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Quantum 1200 Series DAT Autochanger User's Guide

1. Bit Byte 7 6 5 4 3 D 1 0 0 Peripheral Qualifier Peripheral Device Type 1 RMB Reserved 2 Version 3 Obsolete NormACA HiSup Response Data Format 4 Additional Length 5 SCCS ACC ALUA 3PC Reserved 6 BQue EncServ VS MultiP MChngr Obsolete Addr16 7 RelAdr Obsolete Wbus16 Sync Linked Obsolete CmdQue VS MSB 8 15 Vendor Identification QUANTUM LSB MSB 16 31 Product Identification LSB MSB 32 35 Product Revision Level hhss LSB MSB 36 55 Vendor Specific Bytes LSB 56 Reserved Clocking QAS TUS 57 Reserved MSB 58 59 Version Descriptor first version descriptor LSB n 1 Version Descriptor last version descriptor 1f more than one n Figure 4 3 Standard Inquiry Data Page Data Format 81 81200 02 REV A01 January 2005 4 13 INQUIRY Command 12h SDLT 600 SCSI Interface Guide The following table contains field descriptions for the data the drive returns Table 4 8 Standard Inquiry Data Page Field Descriptions Field Name Value Description Peripheral Qualifier Peripheral Device Type RMB Version NormACA HiSup Response Data Format Additional Length SCCS ACC ALUA 3PC BQue EncServ 0 04h 00b This field contains 000b if the command is directed to a valid device The field contains 011b if there is no device at the selected LUN This field contain
2. Pu 7 6 5 4 3 2 1 0 MSB 0 1 Parameter Code LSB 2 DU DS TSD ETC TMC LBIN LP 3 Parameter Length MSB 4 n Parameter Value LSB 1 The byte 2 fields are collectively referred to as the Parameter Control byte Figure 4 20 Log Parameters Format for Read Write Error LOG SENSE Page Table 4 24 Log Parameters for Read Write Error LOG SENSE Page Field Descriptions Field Name Description Parameter Code Parameter codes supported for the READ WRITE error counter pages are as follows Code 0000h 0001h 0002h 0003h 0004h 0005h 0006h 8000h 8001h Description Errors corrected without substantial delays Errors corrected with possible delays Total read write errors Total read write errors Total times correction algorithm processed Always 0 for write errors only Total bytes processed Total uncorrected errors WRITE errors since last READ page 02h or READ errors since last WRITE page 03h Total raw write error flags 4 44 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 24 Log Parameters for Read Write Error LOG SENSE Page Field Descriptions Continued Field Name Description 8002h Total dropout error count 8003h Total servo tracking errors 9000h Without substantial delay errors by channel 9007h 9080h Write only Possible delay errors as
3. Pu 6 5 4 3 2 1 36 Product Family Released Firmware 37 Firmware Major Version Number 38 Firmware Minor Version Number 39 EEPROM Format Major Version Number 40 EEPROM Format Minor Version Number 41 Firmware Personality 42 Firmware Subpersonality 43 Vendor Specific Subtype 44 Controller Hardware Version Number 45 Tape Drive EEPROM Version Number 46 Tape Drive Hardware Version Number 47 Media Loader Firmware Version Number 48 Media Loader Hardware Version Number 49 Media Loader Mechanical Version Number 50 Media Loader Present Flag 51 Library Present Flag 52 55 Module Revision Figure 4 4 Vendor Specific Inquiry Data Page Data Format NOTE Refer also to Subsystem Components Revision Page Clh on page 4 26 for information about an alternate method for accessing these same drive subsystem components 81 81200 02 REV A01 January 2005 INQUIRY Command 12h SDLT 600 SCSI Interface Guide Table 4 9 Vendor Specific Inquiry Data Page Field Descriptions Field Name Description Product Family Released Firmware Version Number Fields Firmware Personality Firmware Subpersonality Vendor Specific Subtype Media Loader Present Flag Library Present Flag Module Revision Indicates the data density of each of the SDLT tape drives as follows Value Drive Density Ah 110 0 220 0 GB Bh 160 0 320 0 GB Ch 300 0 600 0 GB Differentiates b
4. ae 7 6 5 4 3 2 1 0 0 PS 0 SPF 0 Page Code 02h 1 Page Length 0Eh 2 Buffer Full Ratio 3 Buffer Empty Ratio MSB 4 5 Bus Inactivity Limit LSB MSB 6 7 Disconnect Time Limit LSB MSB 8 9 Connect Time Limit LSB MSB 10 11 Maximum Burst Size LSB 12 EMDP Fair Arbitration DIMM DTDC 13 Reserved MSB 14 15 Reserved LSB Figure 4 46 Disconnect Reconnect MODE SELECT Page Data Format 4 78 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 48 Disconnect Reconnect MODE SELECT Page Field Descriptions Field Name Description PS Parameters Savable For MODE SELECT must be set to 0 SPF SubPage Format Always set to 0 Indicates that the drive uses the page_0 page format Page Code Identifies the type of MODE SELECT page being transferred A value of 02h identifies this as the Disconnect Reconnect Page Page Length Indicates the number of bytes in the page excluding bytes 0 and 1 The length is returned in MODE SENSE commands and must subsequently be set to the same value when performing MODE SELECT If the drive receives an unexpected page length value it returns a CHECK CONDITION status Sense Key set to ILLEGAL REQUEST Buffer Full Ratio Not supported The drive ignores all values Buffer Empty Ratio Not supported The drive ignores all values Bus Inactivity Limit Disconnect Time L
5. 4 245 Error Summary for the WRITE ATTRIBUTE Command 4 247 WRITE BUFFER Command 3Bh 4 249 Write Combined Header and Data Mode 00h 4 250 Write Data Mode 02h v2 0 ee LER rer ede Rr eere RE Reed 4 250 Download Microcode Mode 04h 4 25 Download Microcode and Save Mode 05h 4 25 Write Data to Echo Buffer Mode OAh 4 251 WRITE FILEMARKS Command 10h 4 252 81 81200 02 REV A01 January 2005 ix Table of Contents SDLT 600 SCSI Interface Guide x January 2005 81 81200 02 REV A01 List of Tables 1 Introduction 0 cece cece eee eee eens 1 1 Table 1 1 Typographical Conventions 1 3 2 SCSI Parallel Protocol 2 1 Table 2 1 Drive s MESSAGE OUT Phase Response 2 3 3 scsi Mess ges IA ee ng ee ee es ee 3 1 Table 3 1 SCSI Message Format 3 2 Table 3 2 SDLT Tape Drive Extended Message Field Descriptions 3 3 Table 3 3 SDLT Tape Drive Supported Messages 3 3 Table 3 4 Drive s
6. 4 49 Temperature Log Page ODh AH teen e eens 4 51 TapeAlert Log Page Eh iii cent ttn hen 4 53 Read Write Compression Log Page 32h 4 57 Device Wellness Log Page 33h prin apana canner cle gare ek ee Mumba T A 4 61 Device Status Log Page 3Eh 0 ccc ai e a a a tae a aa 4 64 MODE SELECT 6 10 Command 15h 55h 4 67 Mode Parameter List cocco uer Re ep E A E area A A ESE 4 69 Mode Parameter Header 0 20 0 0c ccc re 4 71 Mode Parameter Block Descriptor 4 73 Mode Page Descriptor oi hari osde sera au RGUAENGU RACK P LE ee abe 4 75 Read Write Error Recovery Page 01h 4 76 Disconnect Reconnect Page 02h 4 78 Control Mode Page OAh 4 80 Data Compression Page OFh 4 82 Device Configuration Page 10h 4 84 Medium Partition Page 11h 4 87 Logical Unit Control Page 18h 4 89 Port Control Page 19h oliin e dex eR ae a ded eate e sd Re EE 4 90 TapeAlert P ge LICH ss eoe eI aeg eet tree ctos di rede 4 92 Vendor Specific Configuration
7. 4 134 81 81200 02 REV A01 January 2005 vii Table of Contents SDLT 600 SCSI Interface Guide PERSISTENT RESERVE IN Command SEh 4 135 PERSISTENT RESERVE OUT Command 5Fh 4 142 PREVENT ALLOW MEDIUM REMOVAL Command 1Eh 4 152 READ Command O08h 4 153 Filemark and End of Data Handling 4 154 End of Medium Partition Handling 4 155 READ ATTRIBUTE Command 8Ch 4 156 Error Summary for the READ ATTRIBUTE Command 4 157 READ ATTRIBUTE Service Action Codes 4 158 ATTRIBUTE VALUES Service Action 4 159 ATTRIBUTE LIST Service Action 4 160 VOLUME LIST Service Action o osi i a n e a a a eens 4 161 PARTITION LIST Service Action 4 162 Enhanced Medium Auxiliary Memory EMAM Attributes 4 163 Attribute Eorrmat nepos eher ORTOPUDOCURADCCEERA I V DES RATE EUER EAT Ra y 4 163 Attribute Identifier Values 4 165 Unique Features of the SDLT Tape Drive Implementation of Read Write Attributes
8. 4 20 Table 4 11 Device Identification Page Field Descriptions 4 21 Table 4 12 Vendor unique Logical Unit Identifier Field Descriptions 4 22 Table 4 13 Logical Unit NAA Identifier Field Descriptions 4 24 Table 4 14 Firmware Build Information Page Field Descriptions 4 25 Table 4 15 Subsystem Components Revision Page Field Descriptions 4 27 Table 4 16 LOAD UNLOAD Command Descriptor Block Field Descriptions 4 28 Table 4 17 LOCATE Command Descriptor Block Field Descriptions 4 30 Table 4 18 LOG SELECT Command Descriptor Block Field Descriptions 4 32 Table 4 19 LOG SELECT Page clearing Codes 4 33 Table 4 20 LOG SELECT Log Page Header Field Descriptions 4 34 Table 4 21 LOG SELECT Log Parameters Field Descriptions 4 35 Table 4 22 LOG SENSE Command Descriptor Block Field Descriptions 4 40 Table 4 23 Read Write Error LOG SENSE Header Field Descriptions 4 43 Table 4 24 Log Parameters for Read Write Error LOG SENSE Page Field Descriptions Ie repa eR RO OW e ce eei v obest etuer Ra Slows 4 44 Table 4 25 Last n Error Events LOG SENSE Header Field Descriptions 4 48 Table 4 26 L
9. 4 82 Figure 4 49 Device Configuration MODE SELECT Page Data Format 4 84 Figure 4 50 Medium Partition MODE SELECT Page Data Format 4 87 Figure 4 51 Logical Unit Control MODE SELECT Page Data Format 4 89 xviii January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide List of Figures Figure 4 52 Figure 4 53 Figure 4 54 Figure 4 55 Figure 4 56 Figure 4 57 Figure 4 58 Figure 4 59 Figure 4 60 Figure 4 61 Figure 4 62 Figure 4 63 Figure 4 64 Figure 4 65 Figure 4 66 Figure 4 67 Figure 4 68 Figure 4 69 Figure 4 70 Figure 4 71 Figure 4 72 Figure 4 73 Figure 4 74 Figure 4 75 Figure 4 76 Figure 4 77 Figure 4 78 Figure 4 79 Figure 4 80 Figure 4 81 Figure 4 82 Format Figure 4 83 Figure 4 84 Figure 4 85 Format Figure 4 86 4 160 Figure 4 87 161 Port Control MODE SELECT Page Data Format 4 90 TapeAlert MODE SELECT Page Data Format 4 92 Vendor Specific Configuration MODE SELECT Page Data Format 4 95 Disaster Recovery Control MODE SELECT Page Data Format 4 97 EEPROM Vendor Specific MODE SELECT Page Data Format 4 98 EEPROM Vendor Specific Page Vendor ID Example Data Format 4 104 MODE SENSE 6 Command Descriptor Block Data Format
10. Figure 4 80 PERSISTENT RESERVE OUT Command Descriptor Block Data Format 4 142 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 82 PERSISTENT RESERVE OUT Command Field Descriptions Field Name Description Service The following service action codes are available All other values are reserved Action Code Name Description 00h Register Registers a Reservation Key with the drive Olh Reserve Creates a persistent reservation using a Reservation Key 02h Release Releases a persistent reservation 03h Clear Clears all Reservation Keys and all persistent reservations 04h Pre empt Pre empts persistent reservations from another initiator 05h Pre empt Pre empts persistent reservations from another amp Clear initiator and clears the task set for the pre empted initiator 06h Register amp Registers a Reservation Key with the tape drive Ignore Existing Reservation Key is ignored Existing Key Note Refer to Table 4 83 on page 4 144 for detailed descriptions of each of the Service Action codes Scope The drive only supports reservations of the entire logical unit Must be set to 0 Type Specifies the characteristics of the persistent reservation being established for all data blocks within the extent or within the logical unit Refer to Table 4 84 on page 4 148 for the applicable Type codes and their meanings Parameter Fields contained in the PERSISTENT R
11. Bit Byte 7 6 5 4 3 2 1 0 0 7 Mode Parameter Header 8 15 Mode Parameter Block Descriptor Optional 8 n or Page s Optional 16 n Figure 4 40 MODE SELECT 10 Mode Parameter List Data Format Table 4 43 MODE SELECT Mode Parameter List Field Descriptions Field Name Mode Parameter Header Mode Parameter Block Descriptor Page s Description Four bytes in length for MODE SELECT 6 or 8 bytes in length for MODE SELECT 10 Contains information about the remainder of the Parameter List and is always present Eight bytes in length Allows the host to set the drive s Logical Block Size and Density Code to be written from BOT The Page Code or Codes of the pages that are a part of this MODE SELECT command 4 70 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Mode Parameter Header The following figure and table illustrate and describe the fields that make up the MODE SELECT command s Mode Parameter header Pu 7 5 4 3 2 1 0 0 Reserved 1 Medium Type 2 Ignored Buffered Mode Speed 0h 3 Block Descriptor Length Figure 4 41 MODE SELECT 6 Mode Parameter Header Data Format Bit Byte 7 5 4 3 2 1 0 0 1 Reserved 2 Medium Type 3 Ignored Buffered Mode Speed 0h 4 5 Reserved MSB 6 7 Block Descriptor Length LSB F
12. 4 218 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 129 REQUEST SENSE Data Field Descriptions Continued Field Name Description Field Not used Always set to 0 Replaceable Unit Code SKSV Sense Key Specific Valid When set to 1 indicates that the data in the Sense Key Specific fields is valid C D Command Data When set to 1 indicates that the illegal parameter is contained in the CDB When set to 0 indicates that the illegal parameter is in the Parameter List from the initiator BPV Bit Pointer Valid When set to 1 indicates that the Bit Pointer field is valid Bit Pointer Field Pointer Internal Status Code Tape Motion Hours Power On Hours Tape Remaining and designates which bit of the byte designated by the field pointer is in error For a multi bit field it points to the most significant bit of the field When BPV is set to 1 indicates the most significant bit of the field in error Reserved fields are treated as individual bit fields the most significant reserved bit that is set is indicated rather than the most significant bit of the entire reserved field When the field in error uses an entire byte the Bit Pointer field is typically not used BPV is set to 0 If the Sense Key is ILLEGAL REQUEST this field indicates which byte of the CDB or Parameter List is in error For a multi byte field the most significant byte is
13. Bit Byte YA 6 5 4 3 2 1 0 MSB 0 1 Parameter Code LSB 2 DU DS TSD ETC TMC LBIN LP 3 Parameter Length 1 4 Value of TapeAlert Flag Flag is set when bit 0 is set to 1 bits 1 7 are reserved 1 The byte 2 fields are collectively referred to as the Parameter Control Byte Figure 4 28 TapeAlert LOG SENSE Page Parameters Format Table 4 32 TapeAlert Page LOG SENSE Parameters Field Descriptions Field Name Description Parameter Code Contains the Flag code See Table 4 33 on page 4 55 for the supported flags level of severity and the flag definitions Parameter Length Always set to 1 Value of TapeAlert Flag If bit 0 is set to 1 indicates that TapeAlert has sensed a problem See Table 4 33 on page 4 55 for the supported flags and their definitions If bit 0 is set to 0 indicates that TapeAlert did not sense a problem and therefore did not set the flag 4 54 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 33 TapeAlert Flags Severity Levels and Meanings Severity Flag Level Meaning 1 Read Warning Warning Problems reading data There is no loss of data but the tape drive s performance is reduced 2 Write Warning Warning Problems writing data There is no loss of data but the capacity of the tape is reduced 3 Hard Error Warning An error occurred during a read or write operation that the drive cannot correct the opera
14. Figure 4 105 RELEASE 10 ID Only Parameter List Data Format 81 81200 02 REV A01 January 2005 4 197 RELEASE UNIT Command 17h SDLT 600 SCSI Interface Guide 4 21 RELEASE UNIT Command 17h NOTE This command has been made obsolete in the latest version of SCSI 3 and should not be used with any new implementations The SDLT tape drive supports this command for legacy applications only The RELEASE UNIT command releases the SDLT tape drive if it is currently reserved by the requesting initiator It is not an error to release the drive if it is not currently reserved by the requesting initiator If the drive is reserved by another initiator however it is not released the drive is only released from the initiator that issued the RELEASE UNIT command E 6 5 4 3 2 1 0 0 Operation Code 17h 1 Logical Unit Number 3rdPty Third Party Device ID Rsv d 2 4 Reserved 5 Control Figure 4 106 RELEASE UNIT Command Descriptor Block Data Format Table 4 115 RELEASE UNIT Command Field Descriptions Field Name Description 3rdPty The third party release option for RELEASE UNIT allows an initiator to release a logical unit that was previously reserved using the third party reservation option When set to 0 the third party release option is not requested When set to 1 the drive is released if the same initiator originally reserved it using the third party reservation opt
15. 3 6 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 3 SCSI Messages 3 2 6 3 2 7 IGNORE WIDE RESIDUE 23h The SDLT tape drive sends the IGNORE WIDE RESIDUE message to the initiator to indicate that the number of valid bytes sent during the last REQ ACK handshake and REQB ACKB handshake of a DATA IN phase is less than the negotiated transfer width The Ignore field indicates the number of invalid data bytes transferred The drive sends this message immediately following the DATA IN phase and before any other messages Figure 3 3 illustrates the data format of the IGNORE WIDE RESIDUE message Table 3 6 describes the field definitions Bit Byte 7 6 5 4 3 2 1 0 0 Message Code 23h 1 Ignore 01h Figure 3 3 IGNORE WIDE RESIDUE Message Data Format Table 3 6 IGNORE WIDE RESIDUE Message Field Definitions Ignore Invalid Data Bits 16 bit Transfers 00h Reserved Olh DB 15 8 02h FFh Reserved INITIATOR DETECTED ERROR 05h The initiator sends the INITIATOR DETECTED ERROR message to inform the SDLT tape drive that an error has occurred that does not preclude the drive from retrying the operation for example a bus parity error The source of the error may either be related to previous activities on the SCSI bus or may be strictly drive related When the drive receives this message it may attempt to re transfer the last command d
16. 4 179 A Comparison of MAM and EMAM 4 179 READ BLOCK LIMITS Command 0S5h 4 181 READ BUFFER Command 3Ch 4 183 Retrieving Diagnostic Data 4 185 Read Data from the Saved Buffer Alh 4 185 Read Data from the Live Buffer A2h 4 185 Compressors oupa ese c a E ca he te eae Manto tke Mete ds 4 186 Combined Header and Data Mode 00h 4 186 Data Mode O2b jrs reei IAEA WANENE y XN 4 187 Descriptor Mode 03h 6 eee teen een eben nen ees 4 187 Read Data from Echo Buffer 0Ah 4 187 Echo Buffer Descriptor Mode 0Bh 4 188 READ POSITION Command 34h 4 189 Read Position Data Short Form 4 190 Read Position Data Long Form 4 192 RECEIVE DIAGNOSTIC RESULTS Command 1Ch 4 194 RELEASE 10 Command 57h 0 0 0 0 AA ka kaa kaka 4 196 RELEASE UNITCommand 17h 4 198 REPORT DENSITY SUPPORT Command 44h 4 199 REPORT
17. Field Descriptions 4 80 Data Compression MODE SELECT Page Field Descriptions 4 83 Device Configuration MODE SELECT Page Field Descriptions 4 85 Medium Partition MODE SELECT Page Field Descriptions 4 87 Logical Unit Control MODE SELECT Page Field Descriptions 4 89 Port Control MODE SELECT Page Field Descriptions 4 90 TapeAlert MODE SELECT Page Field Descriptions 4 92 Vendor Specific Configuration MODE SELECT Page Field Descriptions 4 96 Disaster Recovery Control MODE SELECT Page Field Descriptions 4 97 EEPROM Vendor Specific MODE SELECT Page Parameter Descriptions 4 98 Changeable Mode Parameters Within MODE SELECT 4 105 MODE SENSE Command Descriptor Block Field Descriptions 4 108 MODE SENSE Data Header Field Descriptions 4 110 MODE SENSE Block Descriptor Field Descriptions 4 112 MODE SENSE Page Field Descriptions 4 113 Supported MODE SENSE Block Pages and Page Codes 4 113 Read Write Error Recovery MODE SENSE Page Field Descriptions 4 115 Disconnect Reconnect MODE SENSE Page Field Descriptions 4 117 Control Mode MODE SENSE Page Field Descriptions 4 118 Data Compress
18. 8 15 Logical Object Number LSB MSB 16 23 Logical File Identifier LSB MSB 24 31 Logical Set Identifier LSB Figure 4 101 READ POSITION Long Form Data Format Table 4 112 READ POSITION Long Form Data Field Descriptions Field Name Description BOP Beginning of Partition When set to 1 indicates that the drive is at the Beginning of Partition BOP in the current partition When set to 0 indicates that the current logical position is not at BOP Since SDLT tape drives do not support more than one partition the value of this field is 1 when at BOT EOP End of Partition When set to 1 indicates that the drive is positioned between early warning and the End of Partition EOP in the current partition When set to 0 indicates that the current logical position is not between early warning and EOP 4 192 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 112 READ POSITION Long Form Data Field Descriptions Continued Field Name Description MPU Mark Position Unknown When set to 1 indicates that the values contained in the Logical File Identifier and Logical Set Identifier fields are not known or accurate reporting is not currently available When set to 0 indicates that the values these fields contain are accurate LONU Logical Object Number Unknown When set to 1 indicates that the Partition Number Logical Object
19. The SDLT tape drive initiates a WIDE DATA TRANSFER REQUEST message exchange whenever a previously arranged transfer width agreement may have become invalid The agreement becomes invalid after any condition that may leave the data transfer agreement in an indeterminate state such as e After a hard reset condition e After a TARGET RESET message e After a power cycle The WIDE DATA TRANSFER REQUEST message exchange establishes an agreement between two SCSI devices on the width of the data path to be used for DATA phase transfer between them This agreement applies to DATA IN and DATA OUT phases only All other information transfer phases must use an eight bit data path The drive implements both the wide data transfer option and synchronous data transfer option If both wide and synchronous data transfers are used the wide data transfer agreement must be negotiated first If a synchronous data transfer agreement is in effect the drive resets the synchronous agreement to asynchronous mode after accepting a WIDE DATA TRANSFER REQUEST message The transfer width established applies to all logical units Valid transfer widths for the SDLT tape drive are 8 bits transfer width 00h and 16 bits transfer width 01h Other transfer widths are reserved 3 14 January 2005 81 81200 02 REV A01 m SCSI Commands 0 CHAPTER 4 Q This chapter describes the supported SCSI commands options and error recovery procedures implemented in the
20. When the host requests Page 00h the drive returns the 4 byte page header followed by the pages supported in ascending order one byte for each Eu 2 6 5 4 3 2 1 0 0 Page Code 00h 1 Reserved MSB 2 3 Page Length 0Ah LSB 4 Supported Pages Log Page 00h 5 Write Error Log Page 02h 6 Read Error Log Page 03h 7 Last n Error Events Log Page 07h 8 Sequential Access Device Log Page 0Ch 9 Temperature Log Page 0Dh 10 TapeAlert Log Page 2Eh 11 Read Write Compression Ratio Log Page 32h 12 Device Wellness Log Page 33h 13 Device Status Log Page 3Eh Figure 4 18 Supported Pages LOG SENSE Page Data Format 4 42 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 8 3 Read Page 03h Write Page 02h Error Log Page Each log page begins with a 4 byte header followed by a number of log parameters Bit Byte 7 6 5 4 3 2 1 0 0 Page Code 1 Reserved MSB 2 3 Page Length LSB Figure 4 19 Read Write Error LOG SENSE Page Header Format Table 4 23 Read Write Error LOG SENSE Header Field Descriptions Field Name Description Page Code Echoes the page code specified in the LOG SENSE CDB Page Length Specifies the total number of bytes contained in this log page excluding the 4 bytes that make up the header 81 81200 02 REV A01 January 2005 4 43 LOG SENSE Command 4Dh SDLT 600 SCSI Interface Guide
21. length of the parameter data is available in the Identifier Length field in the parameter data If the remainder of the parameter data is required the application client must send a new REPORT DEVICE IDENTIFIER command with a value in the Allocation Length field large enough to hold all of the data 4 204 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands The REPORT DEVICE IDENTIFIER parameter list contains a 4 byte field that sets the length in bytes of the parameter list and the drive s identifier Bit Byte 7 6 5 4 3 2 1 0 MSB 0 3 Identifier Length n 4 LSB 4 n Identifier Figure 4 111 REPORT DEVICE IDENTIFIER Data Format Table 4 120 REPORT DEVICE IDENTIFIER Parameter Data Field Descriptions Field Description Identifier Length Identifier Specifies the length in bytes of the Identifier field If the value of the Allocation Length field in the CDB is too small to transfer all of the identifier the length is not adjusted to reflect the truncation The identifier length is initially set to 0 Only a successful SET DEVICE IDENTIFIER command changes the value of the identifier The value reported is the last value written by a successful SET DEVICE IDENTIFIER command Only a successful SET DEVICE IDENTIFIER command changes the value of the identifier The identifier value persists through resets power cy
22. 0 4 FDP 0 SDP 0 IDP 0 PSUM 0 POFM Clear ADDP 5 Medium Format Recognition 01 6 Reserved Partition Units 7 Reserved MSB 8 9 Partition Size LSB Figure 4 50 Medium Partition MODE SELECT Page Data Format Table 4 52 Medium Partition MODE SELECT Page Field Descriptions Field Name Description PS Parameters Savable For MODE SELECT must be setto 0 Page Code Identifies the type of MODE SELECT page being transferred A value of 11h identifies this as the Medium Partition Page Page Length Indicates the number bytes in the page ezcluding bytes 0 and 1 The Mazimum Additional Partitions length is returned in MODE SENSE commands and must subsequently be set to the same value when performing MODE SELECT If the drive receives an unexpected page length value it returns a CHECK CONDITION status Sense Key set to ILLEGAL REQUEST Not supported Must be set to 0 81 81200 02 REV A01 January 2005 4 87 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide Table 4 52 Medium Partition MODE SELECT Page Field Descriptions Continued Field Name Description Additional Partitions Defined FDP SDP IDP PSUM POFM Clear ADDP Medium Format Recognition Partition Units Partition Size Must be set to 0 Specifies the number of additional partitions defined for the tape based on the settings of the SDP and IDP bits The maximum allowed is the
23. 80 0 GB 160 0 GB VStape I 7Fh No change from previous density No Operation Number Must be set to 0 indicating that all of the remaining logical blocks on the tape have of Blocks the medium characteristics specified by this block descriptor Block Specifies the length in bytes of each logical block transferred A block length of 0 Length indicates that the length is variable specified in the I O command Any value other than 0 indicates the number of bytes per block to use for READ WRITE and VERIFY commands that specify a Fixed bit of 1 1 e Fixed Block Mode which also causes the transfer length in the CDB to be defined as a block count If the Fixed bit is not set to 1 the drive ignores this field The value in this field must be a multiple of 4 1 The Density Code must match a supported density of the tape cartridge currently mounted in the SDLT tape drive 4 74 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Mode Page Descriptor Following the MODE SELECT command s Mode Parameter Block Descriptor are the MODE SELECT pages each of which sets a different device parameter Each Mode page has a 2 byte header that identifies the page code and indicates the number of bytes in that page Bx e 6 5 4 3 2 1 0 0 PS 0 SPF 0 Page Code 1 Page Length 2 n Mode Parameters Figure 4 44 MODE SELECT Page Descriptor Data Form
24. Current Indicates the total number of times the drive performed a Write retry during this Write load of the medium Retries Count Current Indicates the amount of data physically read from the medium during this load of Amount of the medium This value is expressed in increments of 1 048 576 bytes that is a Data Read value of 1 means 1 048 576 bytes 2 means 2 097 152 bytes and so on Current Indicates the number of times the drive performed a Read retry during this load of Read the medium Retries Count Previous Indicates the amount of data physically written to the medium during the previous Amount of load of the medium This value is expressed in increments of 1 048 576 bytes Data that is a value of 1 means 1 048 576 bytes 2 means 2 097 152 bytes and so on Written Previous Indicates the total number of times the drive performed a Write retry during the Write previous load of the medium Retries Count 4 170 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 100 MEDIUM USAGE HISTORY Attribute Parameter Data Field Descriptions Continued Field Name Description Previous Indicates the amount of data physically read from the medium during the Amount of previous load of the medium This value is expressed in increments of 1 048 576 Data Read bytes that is a value of 1 means 1 048 576 bytes 2 means 2 097 152 bytes and so on Previous Indicates the nu
25. Data Format 4 230 Figure 4 125 REWIND Command Descriptor Block Data Format 4 232 Figure 4 126 SEND DIAGNOSTIC Command Descriptor Block Data Format 4 233 Figure 4 127 SET DEVICE IDENTIFIER Command Descriptor Block Data Format 4 237 Figure 4 128 SET DEVICE IDENTIFIER Parameter List Data Format 4 238 Figure 4 129 SPACE Command Descriptor Block Data Format 4 239 Figure 4 130 TEST UNIT READY Command Descriptor Block Data Format 4 241 Figure 4 131 VERIFY Command Descriptor Block Data Format 4 242 Figure 4 132 WRITE Command Descriptor Block Data Format 4 243 Figure 4 133 WRITE ATTRIBUTE Command Descriptor Block Data Format 4 245 Figure 4 134 WRITE ATTRIBUTE Parameter List Format 4 246 Figure 4 135 WRITE BUFFER Command Descriptor Block Data Format 4 249 Figure 4 136 WRITE FILEMARKS Command Descriptor Block Data Format 4 252 81 81200 02 REV A01 January 2005 xxi List of Figures SDLT 600 SCSI Interface Guide xxii January 2005 81 81200 02 REV A01 1 1 1 2 CHAPTER 1 gg Introduction Purpose and Scope This reference guide is a comprehensive source of information about SCSI commands and SCSI messages used by the Super DLTtape generation SDLT tape drives This document
26. MAM NOT AVAILABLE The application should retry the command in this case 4 15 5 A Comparison of MAM and EMAM The SDLT tape drive incorporates a new feature called Enhanced Medium Auxiliary Memory EMAM This feature is used to store MAM attributes in a log file on the tape itself The attributes are accessed using the READ ATTRIBUTE and WRITE ATTRIBUTE commands An EMAM device mimics a MAM device with the following exceptions If the tape is bulk erased the EMAM attribute data is lost The next time the tape 1s used it has default values in the attribute fields 81 81200 02 REV A01 January 2005 4 179 READ ATTRIBUTE Command 8Ch SDLT 600 SCSI Interface Guide e Since the EMAM data is read off the tape the host needs to wait for one of two ready states to read and write attributes If the SDLT tape drive is configured to report the MAM Available Unit Attention using the EEPROM setting RepMAMAvailUA see Table 4 58 on page 4 98 once that UA is reported to the host it can read and write MAM attributes If the SDLT tape drive is not configured to report the MAM Available Unit Attention the host needs to wait for the Not Ready to Ready transition prior to reading and writing MAM attributes If the host sends READ ATTRIBUTE or WRITE ATTRIBUTE commands prior to the Ready state the drive returns a CHECK CONDITION status The Sense Data is set to NOT READY the Sense Key is set to LOGICAL UNIT NOT READY and the Additional Sense Cod
27. Parameter value for 05h is eight bytes the Parameter Length field is set to 8 DU Disable Update This bit is not defined for LOG SELECT the drive ignores any value in DU DS Disable Save Not supported DS and Target Save Disable TSD must be set to 1 If DS or TSD or both are set to 0 the drive terminates the command with CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN PARAMETER LIST TSD Target Save Disable Not supported TSD and DS must be set to 1 If TSD or DS or both are set to 0 the drive terminates the command with CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN PARAMETER LIST ETC Enable Threshold Comparison When set to 1 the drive performs a comparison with threshold values once the cumulative value is updated Comparison criteria are defined in Threshold Met Criteria TMC If the comparison is met and the RLEC bit of MODE SELECT SENSE Control Page OAh is set to 1 the drive generates a UNIT ATTENTION for all initiators The drive sets the Additional Sense Code to THRESHOLD CONDITION MET If the RLEC bit is 0 and the comparison is met the drive does not generate a UNIT ATTENTION TMC Threshold Met Criteria Once the criteria specified in this field are met the ETC bit is 1 and the RLEC bit in the MODE SENSE SELECT Control Page is set to 1 the drive generates a UNIT ATTENTION for all initiators
28. Port Control Page 19h This page contains the parameters that affect SCSI target port operation options feel 6 5 4 3 2 1 0 0 PS SPF 0 Page Code 19h 1 Page Length 2 Reserved Protocol Identifier 1h 3 Reserved MSB 4 5 Synchronous Transfer Timeout LSB 6 7 Reserved Figure 4 71 Port Control MODE SENSE Page Data Format 81 81200 02 REV A01 January 2005 4 127 MODE SENSE 6 10 Command 1Ah 5Ah SDLT 600 SCSI Interface Guide Table 4 72 Port Control MODE SENSE Page Field Descriptions Field Name Description PS Parameters Savable Not supported Always set to 0 SPF SubPage Format Always set to 0 Indicates that the drive uses the page 0 page format Page Code Identifies the type of MODE SENSE page being transferred A value of 19h identifies this as the Port Control page Page Length Indicates the number of bytes in the page excluding bytes 0 and 1 The length is returned on MODE SENSE and must subsequently be set to the same value when performing MODE SELECT Protocol A value of 1h indicates that this mode page applies to an SPI device For Identifier details see SCSI Primary Commands 3 SPC 3 Synchronous Indicates the maximum amount of time in 1 msec increments that the Transfer Timeout drive waits before generating an error by performing an unexpected bus free operation The drive enters the BUS FREE phase only if one
29. Rewind Failed 83h 92h DLT Worm Error Read Failed 83h 93h DLTWorm Error Initialization Invalid HARDWARE 04h 08h 00h LUN Communication Failure ERROR 08h Olh LUN Communication Timeout Failure OBh Olh Over Temperature Condition Error 0Ch 80h Write SCSI FIFO CRC Error OCh 84h Write Hifn CRC Error OCh 85h Write XEZ DMA CRC Error 11h 80h Read SCSI FIFO CRC Error 11h 81h Block Port Detected EDC Error 11h 82h Block Port Detected Record CRC Error 11h 83h Interface Buffer CRC Error 15h Olh Random Mechanical Positioning Error 3Bh 08h Repositioning Error 40h 84h Diagnostic POST Failure POST Soft Failure 44h 83h SCSI Chip Gross Error Illegal Command Status 44h 84h Unexpected Unexplained Residue Count in Transfer Register 44h 85h Immediate Data Transfer Timeout 44h 86h Insufficient CDB Bytes 44h 87h Disconnect SDP Sequence Failed 44h 88h Bus DMA Transfer Timeout 81 81200 02 REV A01 January 2005 4 223 REQUEST SENSE Command 03h SDLT 600 SCSI Interface Guide Table 4 131 Supported ASC ASCQ Hex for REQUEST SENSE Command Continued Text Name Sense Key ASC ASCQ Description 44h COh Internal Target Failure 44h Cih EEPROM Copy 1 Area Bad 44h C2h EEPROM Copy 2 Area Bad 44h C3h Both EEPROM Copy Areas Bad 47h 00h SCSI Parity Error 51h 00h Erase Failure 53h 00h Media Load Eject Failure 53h Olh Unload Tape Failure 84h Olh Basic Health Check BHC Diagnostic Test Failed ILLEGAL 05h 1Ah 00h Parameter List Length Erro
30. SDLT 600 SCSI Interface Guide 4 9 13 EEPROM Vendor Specific Page 3Eh The drive supports an EEPROM Vendor Specific Page that enables an initiator to modify savable parameters Only one savable parameter can be changed per MODE SELECT command E 6 5 4 2 1 0 0 PS Rsv d Page Code 3Eh 1 Page Length 2 n ASCII String of Parameter Name and Value Figure 4 56 EEPROM Vendor Specific MODE SELECT Page Data Format The ASCII string has a parameter name followed by one or more space characters a parameter value and an ASCII line feed or null character When the string is parsed the parameter value is interpreted as shown in the following table Note that the parameter name may be in upper or lower case The drive saves the savable parameters during resets and power cycles Table 4 58 EEPROM Vendor Specific MODE SELECT Page Parameter Descriptions Data Parameter Name Type Default Length Bytes Usage VendorID ASCII ProductID ASCII BTHDirMode Decimal CacheTMs Binary DefaultCompON Binary DefFixedBlkLen Decimal QUANTUM SDLT600 8 16 Vendor Identification field in INQUIRY data Product Identification field in INQUIRY data SDLT600 for the SDLT 600 tape drive Obsolete When set the drive always treats a WRITE FILEMARKS command that writes a single filemark and is not preceded by another WRITE FILEMARKS command as if the Immed bit was set
31. The Capacity field is intended to be used by the client to determine that the correct density is being used especially when a lower density format is required Contains 8 bytes of ASCII data identifying the organization responsible for the specifications that define the values in the density support data block Contains 8 bytes of ASCII data identifying the document associated with this density support data block Contains 20 bytes of ASCII data describing the density 81 81200 02 REV A01 January 2005 4 203 REPORT DEVICE IDENTIFIER Command A3h SDLT 600 SCSI Interface Guide 4 23 REPORT DEVICE IDENTIFIER Command A3h The REPORT DEVICE IDENTIFIER command requests that the SDLT tape drive send device identification information to the applicable client eee o 6 5 4 3 2 1 0 0 Operation Code A3h 1 Reserved Service Action 05h 27 5 Reserved MSB 6 9 Allocation Length LSB 10 Reserved 11 Control Figure 4 110 REPORT DEVICE IDENTIFIER Command Descriptor Block Data Format Table 4 119 REPORT DEVICE IDENTIFIER Command Descriptor Block Field Descriptions Field Description Service A service action of 05h identifies this as the REPORT DEVICE IDENTIFIER Action command Allocation Ifthe Allocation Length is not large enough to hold all of the parameter data the Length drive truncates the data it returns This is not considered an error The actual
32. The criteria for comparison are Code Basis of Comparison 00b Every update of the cumulative value 4 36 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 21 LOG SELECT Log Parameters Field Descriptions Continued Field Name Description LBIN LP Parameter Length Parameter Value 01b Cumulative value equal to threshold value 10b Cumulative value not equal to threshold value 11b Cumulative value greater than threshold value The Default Threshold Values are the maximum values that each parameter can attain e The Current Cumulative Values are the values computed since the last reset of the tape drive by power cycle TARGET RESET or SCSI RESET e The Default Cumulative Values are the values to which each parameter is initialized at a reset condition Default value is 0 e By default Current Threshold Values are set to Default Threshold Values Note that all types of parameter values are changeable using LOG SELECT List Binary Not used List Parameter Always set this bit to 0 to indicate that parameter codes are treated as data counters Specifies the number of bytes in the parameter value Indicates the actual value of this log parameter 81 81200 02 REV A01 January 2005 4 37 LOG SELECT Command 4Ch SDLT 600 SCSI Interface Guide 4 7 4 Error Detection Summary in LOG SELECT Pages The host issues a LOG SENSE command
33. Unsupported FUNCTIONS REQUEST SENSE Allocation Sense Data REWIND 0 SEND Parameter List Diagnostic Page DIAGNOSTIC SET DEVICE Parameter List Device ID IDENTIFIER SPACE 0 TEST UNIT 0 READY VERIFY 0 WRITE Transfer Data WRITE BUFFER Parameter List Microcode Image Data or Test Data WRITE FILEMARKS January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 1 3 Unit Attention Condition Queued Unit Attentions are implemented on the SDLT tape drive and are maintained separately for each valid LUN for each initiator Unit Attentions are created in each of the following circumstances At power on At Bus Reset On a BUS DEVICE RESET message When the medium may have changed asynchronously When another initiator changes the Mode parameters When a firmware microcode update has completed Change of SCSI bus transceivers SE or LVD Up to three Unit Attentions may be queued for each initiator If an initiator does not clear its queued Unit Attentions any additional Unit Attention conditions are not reported 4 1 4 Behavior at Power On The SDLT tape drive s behavior at power on consists of the following The drive s SCSI lines are set to high impedance The design of the drive prevents it from generating any spurious signals on the SCSI bus during power on Within five seconds of power on the tape drive respond
34. WAKES Wakeup Supported Not supported Always set to 0 81 81200 02 REV A01 January 2005 4 215 REQUEST SENSE Command 03h SDLT 600 SCSI Interface Guide 4 27 REQUEST SENSE Command 03h The REQUEST SENSE command directs the SDLT tape drive to transfer detailed Sense Data to the initiator ee 7 6 5 4 3 2 1 0 0 Operation Code 03h 1 Reserved DESC 2 3 Reserved 4 Allocation Length 5 Control Figure 4 120 REQUEST SENSE Command Descriptor Block Data Format Table 4 128 REQUEST SENSE Command Data Field Descriptions Field Name Description DESC Descriptor Indicates which sense data format the drive returns The drive does not support descriptor format sense data Must be set to 0 indicating that the drive returns fixed format sense data Specifies the maximum number of Sense Data bytes to be returned The drive terminates the transfer when it has transferred this number of bytes or all available Sense Data to the host whichever is less Allocation Length The Sense Data are valid for a CHECK CONDITION or RESERVATION CONFLICT status returned on the previous command The drive preserves the Sense Data bytes until retrieved by a REQUEST SENSE command or until the receipt of any other command from the same initiator though some commands such as INQUIRY do not change Sense Data If the drive receives an unsolicited REQUEST SENSE it returns Sense
35. disabled EnaThirdPtyDens Binary 1 1 When set to 1 makes non DLT density codes act as the default density same as density code 0 ForceComp Binary 0 1 Ob Automatic 1b Force Compression disabled 10b Force Compression enabled ForceDensity Decimal 0 1 Obsolete ForceEERebuild Binary 0 1 When set to 1 forces the drive to reset all of the parameters to default values at the next power cycle 4 100 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 58 EEPROM Vendor Specific MODE SELECT Page Parameter Descriptions Parameter Name Data Type Default Length Bytes Usage MaxBurstSize Mod4FixedSize NoDeferRcvdErr NoSCSIEject RedundancyMode RepBusyInProg RepMAMAvailUA ReportRcvdPerrs ReportRcvdRdErr RepUaOnSeqUnld Binary Binary Binary Binary Decimal Binary ASCII Binary Binary Binary 0080h 2 Specifies the maximum amount of data to be transferred without disconnecting A value of 0 sets no limit This value is given in 512 byte increments For example a value of 8 indicates 4 KB The drive rounds values that are not multiples of 8 down to the nearest multiple of 8 Minimum value of this field is 0000h maximum value is FFFFh When set to 1 limits fixed block MODE SELECT lengths to a multiple of 4 bytes When set to 1 the drive reports a deferred recovered error as a current rec
36. except INQUIRY and REQUEST SENSE commands following detection of the condition The Sense Key is set to RECOVERED ERROR with the Additional Sense Code set to 5Dh 00h TapeAlert event The SCSI command with CHECK CONDITION completes without error before the report of any exception condition and does not need to be repeated 4 130 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 73 TapeAlert MODE SENSE Page Field Descriptions Continued Field Name Description 04h Unconditionally Generate Recovered Error The drive reports informational exception conditions by returning CHECK CONDITION status on the next SCSI command except INQUIRY and REQUEST SENSE commands following detection of the condition The Sense Key is set to RECOVERED ERROR with the Additional Sense Code set to 5Dh 00h TapeAlert event The SCSI command with CHECK CONDITION completes without error before the report of any exception condition and does not need to be repeated 06h Only Report Informational Exception Condition on Request The drive preserves information exception data To access the data issue an unsolicited REQUEST SENSE command to poll the drive The Sense Key is set to NO SENSE with the Additional Sense Code set to 5Dh 00h TapeAlert event The Additional Sense Code of 5Dh 00h for values 03h and 06h signals that a TapeAlert occurred The drive stores information about the eve
37. identified as saveable by the DS bit in the log page When set to 0 specifies that the drive does not save the parameters Note If PCR and SP are both set to 1 the drive terminates the command with a CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN CDB PC Page Control Defines the type of parameter values to be selected Code Type of Parameter Value 00b Current Threshold Values 01b Current Cumulative Values 10b Default Threshold Values 11b Default Cumulative Values When the PC field is set to 10b and the Parameter List Length field is set to 0 all Current Threshold Values are reset to the Default Threshold Values When the PC field is set to 11b and the Parameter List Length field is set to 0 all Current Cumulative Values are reset to the Default Cumulative Values This is equivalent to clearing all log pages that can be cleared Note The drive ignores the PC field value if the PCR bit is set to 1 Parameter Specifies the length in bytes of the LOG SELECT parameter list to be List Length transferred from the initiator to the drive during the DATA OUT phase A Parameter List Length of 0 indicates that no data is to be transferred This condition is not considered an error 4 32 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 7 1 Overview LOG SELECT Command Descriptor Block Errors The following conditions constitute e
38. returns Page Code Not used Allocation Length Specifies the number of bytes of diagnostic page results the drive is allowed to send to the initiator 4 194 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands The drive returns the following data as a result of the RECEIVE DIAGNOSTIC RESULTS command Use the REQUEST SENSE command to obtain more detailed information following a CHECK CONDITION status on a SEND DIAGNOSTIC command i 7 6 5 4 3 2 1 0 0 Controller Present Flag 1 Controller Error ASQ 2 Drive Present Flag 3 Drive Error ASQ 4 7 MB Written 8 11 Total Write Errors 12 15 MB Read 16 19 Total Read Errors 20 Drive Health Check Status 21 Media Health Check Status Notes 1 Controller and Drive Present Flags 1 Present 0 Not present 2 Controller and Drive Error ASQs 0 No error Non zero Error 3 Contains the highest severity TapeAlert flag set against the drive or media Figure 4 103 RECEIVE DIAGNOSTIC RESULTS Data Format This information indicates which of the main components of the SDLT tape drive subsystem may have failed diagnostic testing For the Level 1 Electronics test the first four fields are set to 1 and the second four fields are set to 0 For the Level 2 Write Read Functionality test the first four fields are set to the defaults of 1 0 1 and 0 respectively and the seco
39. the drive does not operate in Disaster Recovery mode 81 81200 02 REV A01 January 2005 4 133 MODE SENSE 6 10 Command 1Ah 5Ah SDLT 600 SCSI Interface Guide EEPROM Vendor Specific Page 3Eh This page returns all of the EEPROM parameters that can be set with the MODE SELECT EEPROM Vendor Specific page it sometimes returns an error message in the returned ASCII string The 10 byte MODE SENSE command for the EEPROM page returns data in the form of a MODE SENSE 10 data header followed by block and page descriptors m In 6 5 4 3 2 1 0 0 PS 0 Rsv d Page Code 3Eh 1 Page Length 2 n ASCII String of Parameter Name or Value Figure 4 75 EEPROM Vendor Specific MODE SENSE Page Data Format As with other MODE SENSE pages the data in the page descriptor is organized in the form ofa parameter header followed by the parameter s value The parameter is as follows Name T Current Default Minimum Maximum Table 4 76 lists the parameter definitions Table 4 76 EEPROM Vendor Specific MODE SENSE Page Field Descriptions Field Name Description Name Refers to the parameter name for example ProductID or DefaultCompOn T Type Designates data type b indicates binary A indicates string type no designator indicates that the data is in decimal format Current Specifies the current default minimum and maximum values of the parameter Default Minimum
40. 0 PS 0 SPF 0 Page Code 02h 1 Page Length 0Eh 2 Buffer Full Ratio 0 3 Buffer Empty Ratio 0 MSB 4 5 Bus Inactivity Limit 0 LSB MSB 6 7 Disconnect Time Limit 0 LSB MSB 8 9 Connect Time Limit 0 LSB MSB 10 11 Maximum Burst Size 0 LSB 12 EMDP Fair Arbitration DIMM DTDC 13 Reserved MSB 14 15 Reserved LSB Figure 4 65 Disconnect Reconnect MODE SENSE Page Data Format 4 116 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 66 Disconnect Reconnect MODE SENSE Page Field Descriptions Field Name Description PS Parameters Savable Not supported Always set to 0 SPF SubPage Format Always set to 0 Indicates that the drive uses the page_0 page format Page Code Identifies the type of MODE SENSE page being transferred A value of 02h identifies this as the Disconnect Reconnect Page Page Length Indicates the number of bytes in the page always OEh excluding bytes 0 and 1 The length is returned on MODE SENSE and must subsequently be set to the same value when performing MODE SELECT Buffer Full Ratio Not supported Always set to 0 Buffer Empty Ratio Not supported Always set to 0 Bus Inactivity Limit Disconnect Time Limit Connect Time Limit Maximum Burst Size EMDP Fair Arbitration DIMM DTDC Not supported Always set to 0 Not supported Always set to 0 Not supported Always se
41. 02 REV A01 January 2005 4 171 READ ATTRIBUTE Command 8Ch SDLT 600 SCSI Interface Guide PARTITION USAGE HISTORY Provides statistics see Figure 4 92 for the partition specified by the Partition Number field in the CDB If a field is not used it is set to 0 Bit Byte 7 5 4 3 2 1 0 MSB 0 3 Current Amount of Data Written LSB MSB 4 7 Current Write Retries Count LSB MSB 8 11 Current Amount of Data Read LSB MSB 12 15 Current Read Retries Count LSB MSB 16 19 Previous Amount of Data Written LSB MSB 20 23 Previous Write Retries Count LSB MSB 24 27 Previous Amount of Data Read LSB MSB 28 31 Previous Read Retries Count LSB MSB 32 35 Total Amount of Data Written LSB MSB 36 39 Total Write Retries Count LSB 4 172 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Bit Byte 7 6 5 4 3 2 1 0 MSB 40 43 Total Amount of Data Read LSB MSB 44 47 Total Read Retries Count LSB MSB 48 51 Load Count LSB MSB 52 55 Total Change Partition Count LSB MSB 56 59 Total Partition Initialize Count LSB Figure 4 92 PARTITION USAGE HISTORY Attribute Data Format Table 4 101 PARTITION USAGE HISTORY Attribute Parameter Data Field Descriptions Field Name Description Current
42. 1 Specifies the number of bytes in the parameter value All parameters are 2 bytes in length Indicates the actual value of this log parameter 4 52 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 48 7 TapeAlert Log Page 2Eh This page returns results of the SDLT tape drive s ongoing self diagnosis so that the drive s behavior can be monitored and high reliability assured The host typically reads the TapeAlert page from the drive at the beginning of each READ or WRITE activity after any fatal errors occur during a READ or WRITE at the end of any data cartridge when the READ or WRITE activity continues onto another data cartridge and at the end of each READ or WRITE activity The drive sets or clears the flags when the failure or corrective action occurs Bit Byte 7 6 5 4 3 2 1 0 0 Page Code 2Eh 1 Reserved MSB 2 3 Page Length LSB Figure 4 27 TapeAlert LOG SENSE Page Header Format Table 4 31 TapeAlert Page LOG SENSE Header Field Descriptions Field Name Description Page Code Echoes the page code specified in the LOG SENSE CDB Page Length Specifies the total number of bytes contained in this log page excluding the 4 bytes that make up the header 81 81200 02 REV A01 January 2005 4 53 LOG SENSE Command 4Dh SDLT 600 SCSI Interface Guide
43. 10 Reserved 11 Control Figure 4 127 SET DEVICE IDENTIFIER Command Descriptor Block Data Format 81 81200 02 REV A01 January 2005 4 237 SET DEVICE IDENTIFIER Command A4h SDLT 600 SCSI Interface Guide Table 4 139 SET DEVICE IDENTIFIER Command Descriptor Block Field Descriptions Field Name Description Service Action Must be set to 06h Any other value causes the drive to return CHECK CONDITION status with Sense Key set to ILLEGAL REQUEST Parameter List Specifies the length in bytes of the Identifier that is transferred from the Length application client to the SDLT tape drive The maximum value for this field is 64 bytes A Parameter List Length of 0 indicates that no data is to be transferred and that subsequent REPORT DEVICE IDENTIFIER commands return an Identifier length of 0 If the parameter list length exceeds 64 bytes the drive returns CHECK CONDITION status with Sense Key set to ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN CDB The SET DEVICE IDENTIFIER parameter list contains the identifier to be set by the drive Bit Byte 0 n Identifier Figure 4 128 SET DEVICE IDENTIFIER Parameter List Data Format Table 4 140 SET DEVICE IDENTIFIER Parameter List Field Description Field Name Description Identifier The Identifier field is a vendor specific value This value is returned by all subsequent REPORT DEVICE IDENTIFIER commands
44. 121 REPORT LUNS Command Descriptor Block Field Descriptions Continued Field Description Allocation Ifthe Allocation Length is not sufficient to contain the logical unit number values for all Length configured logical units the SDLT tape drive reports as many logical number values as fit in the Allocation Length The format of the report of configured logical units is shown in Figure 4 113 Bit Byte 7 6 5 4 3 2 1 0 MSB 0 3 LUN List Length n 7 LSB 4 7 Reserved MSB 8 15 LUN first LUN LSB n 7 LUN last LUN if more than one n Figure 4 113 LUN Reporting Parameter List Data Format The LUN List Length field contains the length in bytes of the LUN list that can be transferred The LUN list length equals the number of logical unit numbers reported multiplied by 8 If the allocation length in the CDB is too small to allow transfer of information about all of the logical units configured the LUN list length value is not adjusted to reflect the truncation 81 81200 02 REV A01 January 2005 4 207 REPORT SUPPORTED OPERATION CODES Command A3h SDLT 600 SCSI Interface Guide 4 25 REPORT SUPPORTED OPERATION CODES Command A3h The REPORT SUPPORTED OPERATION CODES command requests information on commands the SDLT tape drive supports An application client may request a list of all operation codes and service actions the drive supports or the comma
45. 4 107 MODE SENSE 10 Command Descriptor Block Data Format 4 108 MODE SENSE 6 Data Header Data Format 4 109 MODE SENSE 10 Data Header Data Format 4 110 MODE SENSE Block Descriptor Data Format 4 111 MODE SENSE Page Data Format 4 113 Read Write Error Recovery MODE SENSE Page Data Format 4 114 Disconnect Reconnect MODE SENSE Page Data Format 4 116 Control Mode MODE SENSE Page Data Format 4 118 Data Compression MODE SENSE Page Data Format 4 120 Device Configuration MODE SENSE Page Data Format 4 122 Medium Partition MODE SENSE Page Data Format 4 125 Logical Unit Control MODE SENSE Page Data Format 4 126 Port Control MODE SENSE Page Data Format 4 127 TapeAlert MODE SENSE Page Data Format 4 129 Vendor Specific Configuration Control MODE SENSE Page Data Format 4 131 Disaster Recovery Control MODE SENSE Page Data Format 4 133 EEPROM Vendor Specific MODE SENSE Page Data Format 4 134 PERSISTENT RESERVE IN Command Descriptor Block Data Format 4 135 PERSISTENT RESERVE IN Read Keys Parameters Data Format 4 137 PERSISTENT RESERVE IN
46. 4 11 Figure 4 3 Standard Inquiry Data Page Data Format 4 13 Figure 4 4 Vendor Specific Inquiry Data Page Data Format 4 17 Figure 4 5 Supported Vital Product Data Pages Data Format 4 19 Figure 4 6 Unit Serial Number Page Data Format 4 20 Figure 4 7 Device Identification Page Data Format 4 2 Figure 4 8 Vendor unique Logical Unit Identifier Data Format 4 22 Figure 4 9 Logical Unit NAA Identifier Data Format 4 24 Figure 4 10 Firmware Build Information Page Data Format 4 25 Figure 4 11 Subsystem Components Revision Page Data Format 4 26 Figure 4 12 LOAD UNLOAD Command Descriptor Block Data Format 4 28 Figure 4 13 LOCATE Command Descriptor Block Data Format 4 30 Figure 4 14 LOG SELECT Command Descriptor Block Data Format 4 3 81 81200 02 REV A01 January 2005 xvii List of Figures SDLT 600 SCSI Interface Guide Figure 4 15 LOG SELECT Log Page Data Format 4 34 Figure 4 16 LOG SELECT Log Page Parameters Format 4 35 Figure 4 17 LOG SENSE Command Descriptor Block Data Format 4 39 Figure 4 1
47. 4 3 2 1 0 MSB 0 3 Available Data n 3 LSB 4 Attribute 0 n Attribute x Figure 4 85 READ ATTRIBUTE with ATTRIBUTE VALUES Service Action Parameter List Format Table 4 91 READ ATTRIBUTE with ATTRIBUTE VALUES Service Action Parameter Data Field Descriptions Field Name Description Available Contains the number of bytes of attribute information in the parameter list If the Data parameter list is truncated as a result of insufficient allocation length the contents of the Available Data field are not altered Attribute The drive returns each Attribute formatted as described in Enhanced Medium Auxiliary Memory EMAM Attributes on page 4 163 81 81200 02 REV A01 January 2005 4 159 READ ATTRIBUTE Command 8Ch SDLT 600 SCSI Interface Guide ATTRIBUTE LIST Service Action The READ ATTRIBUTE command with the ATTRIBUTE LIST service action returns parameter data containing the attribute identifiers for the specified partition and volume number The contents of the First Attribute Identifier field in the CDB are ignored The returned parameter data contains the requested attribute identifiers in ascending numerical order by attribute identifier value and using the format shown in Figure 4 86 Bit Byte 7 6 5 4 3 2 1 0 MSB 0 3 Available Data n 3 LSB 4 5 Attribute Identifier 0 n 1 Attribute Identifier x n Figure 4 86 READ ATTRIB
48. 5Fh SDLT 600 SCSI Interface Guide 4 12 PERSISTENT RESERVE OUT Command 5Fh PERSISTENT RESERVE OUT is a 10 byte command used to reserve a logical unit for exclusive or shared use of an initiator The command is used with the PERSISTENT RESERVE IN command Initiators that perform PERSISTENT RESERVE OUT actions are identified by a Reservation Key the application client assigns The application client uses the PERSISTENT RESERVE IN command to identify which other initiators within a system hold conflicting or invalid persistent reservations and uses the PERSISTENT RESERVE OUT command to preempt those reservations if necessary Since the SCSI bus reset of TARGET RESET or other global action does not reset persistent reservations they can be used to enact device sharing among multiple initiators The PERSISTENT RESERVE OUT and PERSISTENT RESERVE IN commands provide the means for resolving contentions in multiple initiator systems with multiple port targets By using the Reservation Key to identify persistent reservations it is possible to determine which ports hold conflicting persistent reservations and to reclaim these reservations from failing or greedy initiators Figure 4 80 illustrates the format of the PERSISTENT RESERVE OUT command Ta 7 6 5 4 3 2 1 0 0 Operation Code 5Fh 1 Reserved Service Action 2 Scope Type 3 6 Reserved MSB 7 8 Parameter List Length 18h LSB 9 Control
49. 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 42 MODE SELECT 6 10 Command Descriptor Block Field Descriptions Field Name Description PF Page Format Indicates that the data the host sent after the MODE SELECT header and block descriptors complies with the definition of pages in the SCSI 3 specification If the Page Format bit is set to 0 only a Mode Parameter Header and Mode Parameter Block Descriptor can be included in the mode parameter data If any other data is included in the mode parameter data the drive terminates the command with CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN CDB SP Save Parameters Not supported Must be set to 0 If set to 1 the drive terminates the command with CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN CDB 4 9 1 Mode Parameter List Figure 4 39 shows the format of the Mode Parameter List that the host passes to the drive during the command s DATA OUT phase Bit Byte 7 6 5 4 3 2 1 0 0 3 Mode Parameter Header 4 11 Mode Parameter Block Descriptor Optional 4 n or Page s Optional 12 n Figure 4 39 MODE SELECT 6 Mode Parameter List Data Format 81 81200 02 REV A01 January 2005 4 69 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide
50. Additional Sense Code to INITIATOR DETECTED ERROR MESSAGE RECEIVED The drive then sends the CHECK CONDITION status and the TASK COMPLETE message and then enters the BUS FREE phase 3 2 8 LOGICAL UNIT RESET 17h This message causes the drive to execute a logical unit reset function on the logical unit identified by the last IDENTIFY message The logical unit reset function is the same as would be performed following a BUS DEVICE RESET message except only the logical unit selected is affected The drive enters the BUS FREE phase as part of processing this message and aborts all commands to the selected logical unit 3 8 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 3 SCSI Messages 3 2 9 MESSAGE PARITY ERROR 09h The initiator sends this message to tell the SDLT tape drive that the last message byte the drive passed to the initiator contained a parity error To indicate that it intends to send the message the initiator sets the ATN signal before it releases ACK for the REQ ACK handshake of the message that has the parity error This provides an interlock so that the drive can determine which message has the parity error If the drive receives this message under any other condition it proceeds directly to the BUS FREE phase by releasing the BSY signal signifying a catastrophic error The drive s response to this message is to switch to the MESSAGE IN phase and re send from the beginning all the
51. Amount of Data Written Current Write Retries Count Current Amount of Data Read Indicates the amount of data physically written to the medium in the partition specified by the Partition Number field in the CDB during this load of the medium This value is expressed in increments of 1 048 576 bytes that is a value of 1 means 1 048 576 bytes 2 means 2 097 152 bytes and so on Indicates the total number of times the drive performed a Write retry in the partition specified by the Partition Number field in the CDB during this load of the medium Indicates the amount of data physically read from the medium in the partition specified by the Partition Number field in the CDB during this load of the medium This value is expressed in increments of 1 048 576 bytes that is a value of 1 means 1 048 576 bytes 2 means 2 097 152 bytes and so on 81 81200 02 REV A01 January 2005 4 173 READ ATTRIBUTE Command 8Ch SDLT 600 SCSI Interface Guide Table 4 101 PARTITION USAGE HISTORY Attribute Parameter Data Field Descriptions Continued Field Name Description Current Indicates the number of times the drive performed a Read retry in the partition Read specified by the Partition Number field in the CDB during this load of the Retries medium Count Previous Indicates the amount of data physically written to the medium in the partition Amount of specified by the Partition Number field in the CDB during the previous load o
52. CONDITION status during long busy conditions Unit Attention Interlocks Control Always set to 00b The drive clears all UNIT ATTENTION conditions when they are reported Software Write Protect Always set to 0 Indicates the action the drive is to take when tape medium is loaded All values not listed below are reserved Value Description 000b The medium is loaded for full access 001b The medium is loaded for Enhanced Medium Auxiliary Memory EMAM access only 010b The medium is not loaded Specifies the maximum time in 100 msec increments that the initiator allows the drive to remain busy for unanticipated conditions that are not a routine part of commands from the initiator A value of 0000h is undefined A value of FFFFh specifies an unlimited busy timeout period The drive does not support extended self test Always set to 0 81 81200 02 REV A01 January 2005 4 119 MODE SENSE 6 10 Command 1Ah 5Ah SDLT 600 SCSI Interface Guide Data Compression Page OFh The Data Compression Page specifies parameters that control data compression Bit Byte 7 6 5 4 3 2 1 0 0 PS 0 Rsv d Page Code OFh 1 Page Length OEh 2 DCE DCC 1 Reserved 3 DDE 0 RED 0 Reserved MSB 4 7 Compression Algorithm 10h LSB MSB 8 11 Decompression Algorithm LSB 12 15 Reserved Figure 4 67 Data Compression MODE SENSE Page Data Format Table 4 68 D
53. Command 4Ch The LOG SELECT command allows the host to manage statistical information the SDLT tape drive maintains about its own hardware parameters and about the installed tape medium Read the description of the LOG SENSE Command 4Dh on page 4 39 it provides information about log page format parameters and supported pages Bc s 4 3 2 1 0 0 Operation Code 4Ch 1 Reserved PCR SP 2 PC Reserved 3 6 Reserved MSB 7 8 Parameter List Length LSB 9 Control Figure 4 14 LOG SELECT Command Descriptor Block Data Format 81 81200 02 REV A01 January 2005 4 31 LOG SELECT Command 4Ch SDLT 600 SCSI Interface Guide Table 4 18 LOG SELECT Command Descriptor Block Field Descriptions Field Name Description PCR Parameter Code Reset If this bit is set to 1 and the Parameter List Length field is set to 0 all accumulated values of page codes 2 3 and 32 are set to 0 and all threshold values are set to default If PCR is set to 1 and the Parameter List Length field is set to a non zero value the drive terminates the command with CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Additional Sense Code ASC set to INVALID FIELD IN CDB See the Note under SP Save Parameters below SP Save Parameters When set to 1 indicates that after performing the specified LOG SELECT operation the drive saves to nonvolatile memory all parameters
54. Compression Ratio LOG SENSE Page Parameter Codes 00h and 01h 81 81200 02 REV A01 January 2005 4 57 LOG SENSE Command 4Dh SDLT 600 SCSI Interface Guide Table 4 35 Log Parameters for Read Write Compression Ratio LOG SENSE Page Field Descriptions Parameter Codes 00h and 01h Field Name Description Parameter Parameter codes supported for the Read Write Compression Ratio Page are Code as follows for codes 00h and 01h only codes 02h through 09h are detailed separately Code Description 00h READ Compression Ratio x 100 Olh WRITE Compression Ratio x 100 DU Disable Update Always set to 0 DS Disable Save Not supported Always set to 1 TSD Target Save Disable Not supported Always set to 1 ETC Enable Threshold Comparison Not supported Always set to 0 TMC Threshold Met Criteria Always set to 0 LBIN List Binary Not used LP List Parameter The drive treats the parameter codes as data counters Always set to 0 Bit Byte 7 6 5 4 3 2 1 0 MSB 0 1 Parameter Code LSB 2 DU DS TSD ETC TMC LBIN LP 3 Parameter Length 04h MSB 4 7 Counter Value LSB Figure 4 31 Log Parameters Format for Read Write Compression Ratio LOG SENSE Page Parameter Codes 02h through 09h 4 58 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 36 Log Parameters for Read Write Compress
55. Data with the appropriate values in the End of Media EOM Sense Key Additional Sense Code and Additional Sense Code Qualifier fields The positional information provided reflects the logical position of the drive The drive returns information based on the non diagnostic data in its buffer as well as the data on the tape medium Additionally bytes 25 through 28 contain the amount of tape to be written in 4 KB blocks The REQUEST SENSE command does not cause the drive to flush its buffered data to tape Therefore if the host requires the exact physical positioning of the tape medium it must precede the REQUEST 4 216 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands SENSE command with a WRITE FILEMARKS command with the Immed bit set to 0 This forces the drive to flush any buffered data to tape A subsequent REQUEST SENSE command returns the actual physical and logical position of the drive to the initiator The following figure illustrates the REQUEST SENSE data format ie 7 6 5 4 3 2 1 0 0 Valid Response Code 70h or 71h 1 Obsolete 2 Filemark EOM ILI Rsv d Sense Key MSB 3 6 Information LSB 7 Additional Sense Length n 7 MSB 8 11 Command Specific Information LSB 12 Additional Sense Code ASC 13 Additional Sense Code Qualifier ASCQ 14 Field Replaceable Unit Code 15 SKS
56. Description Buffered Mode When set to 0 the drive does not report a GOOD status on WRITE Speed commands until it actually writes the data blocks to tape When set to 1 the drive reports GOOD status on WRITE commands as soon as the data block has been transferred to the buffer This is the default configuration of the drive Note that if Buffered Mode is not used the drive suffers a degradation of performance and capacity Always set to 0 indicating the default speed Block Descriptor Specifies the length in bytes of all of the block descriptors If the DBD bit Length in the CDB is set to 0 this value is 8 indicating one Block Descriptor was sent If the DBD bit in the CDB is set to 1 this value is 0 indicating no Block Descriptors were sent 1 When a VStape I or Super DLTtape I cartridge is mounted in the drive the MODE SENSE informat ion reports the Media Type and the correct Density Code as detected on the tape and sets the Write Protect WP bit in the MODE SENSE header to 1 Any command that attempts to write to the medium WRITE WRITE FILEMARKS ERASE returns CHECK CONDITION status with Sense Key set to DATA PROTECT 7 and the Additional Sense Code or Additional Sense Code Qualifier set to CANNOT WRITE MEDIUM INCOMPATIBLE FORMAT 30h 05h The drive does not update the medium 4 10 2 MODE SENSE Block Descriptor The following figure describes the MODE SENSE block descriptor that follows the MOD
57. Descriptions 4 150 Table 4 86 SDLT Tape Drive Interpretation of Service and Scope Value 4 151 Table 4 87 PREVENT ALLOW MEDIUM REMOVAL Command Descriptor Block Field Descriptions EA erba ee goes ates Pat a e Ce odii Gazette dye etr es pedes 4 152 Table 4 88 READ Command Descriptor Block Field Descriptions 4 153 Table 4 89 READ ATTRIBUTE Parameter Data Field Descriptions 4 156 Table 4 90 READ ATTRIBUTE Command Service Action Codes 4 158 Table 4 91 READ ATTRIBUTE with ATTRIBUTE VALUES Service Action Parameter Data Field Descriptions MTS 4 159 Table 4 92 READ ATTRIBUTE with ATTRIBUTE LIST Service Action Parameter Data Field DesGrIptlons 4 set Re Tees e al aed dv RE aie Rd desee deba dete e eda 4 160 Table 4 93 READ ATTRIBUTE with VOLUME LIST Service Action Parameter Data Field Descriptions ed ibi Hing es he Ho as Meise ICA Ie VEI cuir ee anms 4 161 Table 4 94 READ ATTRIBUTE with PARTITION LIST Service Action Parameter Data Field Descriptions ai ML eet eins Unam ee ett ve e addat vfu ede 4 162 Table 4 95 EMAM Attribute Parameter Data Field Descriptions 4 164 Table 4 96 EMAM Attribute Formats 4 164 Table 4 97 EMAM Attribute Identifier Range Assignments 4 165 Table 4 98 Device Type Attributes for EMAM Supported by the SDLT
58. Format 81 81200 02 REV A01 January 2005 4 241 VERIFY Command 13h SDLT 600 SCSI Interface Guide 4 35 VERIFY Command 13h The VERIFY command directs the SDLT tape drive to verify one or more blocks beginning with the next block on the tape The drive verifies both CRCs and EDCs PES 6 5 4 3 2 1 0 0 Operation Code 13h 1 Reserved Immed BytCmp Fixed MSB 2 4 Verification Length LSB 5 Control Figure 4 131 VERIFY Command Descriptor Block Data Format Table 4 142 VERIFY Command Data Field Descriptions Field Name Description Immed Immediate When set to 1 the VERIFY command completes provided it has begun processing before the drive performs any tape medium movement BytCmp Byte Compare Not supported Must be set to 0 Fixed Specifies whether the drive is to verify fixed length or variable length blocks When set to 0 variable block mode is requested The drive verifies a single block with the Verification Length specifying the maximum number of bytes the initiator has allocated for verification When set to 1 the Verification Length specifies the number of blocks the drive is to verify This is valid only if the drive is currently operating in fixed block mode Verification Specifies the amount of data to verify in blocks or bytes as indicated by the Length Fixed field 4 242 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface
59. Guide Chapter 4 SCSI Commands 4 36 WRITE Command 0Ah The WRITE command transfers one or more data blocks from the host to the current logical position on tape When in Buffered Mode which is the default mode of operation the SDLT tape drive reports GOOD status on WRITE commands as soon as the requested data block or blocks have been transferred to the data buffer Refer to the MODE SELECT 6 10 Command 15h 55h on page 4 67 for more information on Buffered Mode Bit Byte i 6 5 4 3 2 1 0 0 Operation Code 0Ah 1 Reserved Fixed MSB 2 4 Transfer Length LSB 5 Control Figure 4 132 WRITE Command Descriptor Block Data Format 81 81200 02 REV A01 January 2005 4 243 WRITE Command 0Ah SDLT 600 SCSI Interface Guide Table 4 143 WRITE Command Data Field Descriptions Field Name Description Fixed Sets both the meaning of the Transfer Length field and whether fixed length or variable length blocks are to be transferred When set to 0 variable length block mode is selected A single block is transferred from the initiator and is written to the drive beginning at the current logical tape position Upon successful termination the drive logically positions the tape after this block on the EOM EOP side The Transfer Length specifies the number of bytes that the drive handshakes from the initiator as one block When set to 1 the Transfer Length
60. Magazine Removed 3Bh 14h Medium Magazine Locked 4Bh 00h Data Phase Error 50h 95h Illegal Append Location Requested DLTIce V30 50h 95h DLTIce protected Medium Overwrite Attempted 53h 02h Media Removal Prevented 55h 04h Insufficient Registration Resources 82h 00h Not Allowed if not at BOT UNIT 06h 28h 00h Not Ready to Ready Transition ATTENTION 29h 00h Reset Occurred 81 81200 02 REV A01 January 2005 4 225 REQUEST SENSE Command 03h SDLT 600 SCSI Interface Guide Table 4 131 Supported ASC ASCQ Hex for REQUEST SENSE Command Continued Text Name Sense Key ASC ASCQ Description 29h Olh Power On Occurred 29h 02h SCSI Bus Reset Occurred 29h 03h Device Reset Function Occurred 29h 04h Device Internal Reset 29h 05h Transceiver Mode Changed to Single Ended 29h 06h Transceiver Mode Changed to LVD 2Ah 01h Mode Parameters Changed 2Ah 02h Log Parameters Changed 2Ah 03h Reservations Preempted 2Ah 04h Reservations Released 2Ah 05h Registrations Preempted 3Bh 13h Medium Magazine Inserted 3Bh 15h Medium Magazine Unlocked 3Fh Olh Microcode has been Changed 3Fh 05h Device Identifier Changed 3Fh 11h Medium Auxiliary Memory Accessible 5Bh Olh Log Threshold Condition Met DATA 07h 27h Olh Hardware Write Protected PROTECTED 27h 02h Logical Unit Software Write Protected 30h 05h Cannot Write Medium Incompatible Format 50h 95h DLTIce protected Medium Overwrite Attempted BLANK 08h 00h 05h EOD Encountered CHECK COMMAND OBh
61. Number Logical File Identifier Logical Set Identifier values contained in the Logical Object Number or Partition Number fields are not known or accurate reporting is not currently available When set to 0 indicates that the values these fields contain are accurate The partition number for the current logical position The number of logical blocks between the beginning of partition and the current logical position Filemarks and Setmarks count as one logical block each The number of Filemarks between the beginning of partition and the current logical position The number of Setmarks between the beginning of partition and the current logical position 81 81200 02 REV A01 January 2005 4 193 RECEIVE DIAGNOSTIC RESULTS Command 1Ch SDLT 600 SCSI Interface Guide 4 19 RECEIVE DIAGNOSTIC RESULTS Command 1Ch The RECEIVE DIAGNOSTIC RESULTS command fetches the results of the last SEND DIAGNOSTIC command sent to the SDLT tape drive Bit Byte 7 6 5 4 3 2 1 0 0 Operation Code 1Ch 1 Reserved PCV 2 Page Code MSB 3 4 Allocation Length LSB 5 Control Figure 4 102 RECEIVE DIAGNOSTIC RESULTS Command Descriptor Block Data Format Table 4 113 RECEIVE DIAGNOSTIC RESULTS Command Data Field Descriptions Field Name Description PCV Page Code Valid Must be set to 0 indicating that the most recent SEND DIAGNOSTIC command defines the data this command
62. PS Parameters Savable Always set to 0 Page Code Identifies the type of MODE SENSE page being transferred A value of 1Ch identifies this as the TapeAlert Page Page Length Indicates the number bytes in the page excluding bytes 0 and 1 The length is returned in MODE SENSE commands and must subsequently be set to the same value when performing MODE SELECT Perf Performance Not supported Always set to 0 EBF Enable Background Function Not supported Always set to 0 EWASC Enable Warning Not supported Always set to 0 DExcpt Disable Information Exception Operations Default value is 1 When set to 0 the reporting method specified by the contents of the MRIE field is selected When set to 1 all information exception operations are disabled and the drive ignores the contents of the MRIE field When in this mode the software polls the TapeAlert Log page Test Always set to 0 LogErr Error Log Not supported MRIE Method for Reporting Informational Exceptions The drive uses the contents of this field to report information about exception conditions Four methods are available Value Method 00h No reporting of Informational Exception Conditions The drive does not report information exception conditions 03h Conditionally Generate Recovered Error This value is the default The drive reports informational exception conditions if reports of recovered errors are allowed by returning CHECK CONDITION status on the next SCSI command
63. Page 25h 4 95 Disaster Recovery Control Page 3Ch 4 97 EEPROM Vendor Specific Page 3Eh 4 98 Changeable Parameters Within MODE SELECT 4 105 MODE SENSE 6 10 Command IAh SAh 4 107 MODE SENSE Data Headers c g WA 4 109 MODE SENSE Block Descriptor 4 111 MODE SENSE Mode Pages 4 113 Read Write Error Recovery Page Olh 4 114 Disconnect Reconnect Page 02h 4 116 Control Mode Page OAh ranie i a a nen rn 4 118 Data Compression Page OFh 4 120 Device Configuration Page 10h 4 122 Medium Partition Page 11h 4 125 Logical Unit Control Page 18h 4 126 Port Control Page I9h dte er dr ie Idee ed baci acted deba bens 4 127 TapeAlert Page 1Ch s sore rwr Grave ee gabe eee Gated moe eL e etre goin 4 129 Vendor Specific Configuration Control Page 25h 4 131 Disaster Recovery Control Page 3Ch 4 133 EEPROM Vendor Specific Page 3Eh
64. Page 83h e Firmware Build Information Page COh e Subsystem Components Revision Page C1h wo 6 5 4 3 2 1 0 0 Peripheral Qualifier Peripheral Device Type 1 Page Code 00h 2 Reserved 3 Page Length 05h 4 Supported Vital Product Data Page 00h 5 Unit Serial Number Page 80h 6 Device Identification Page 83h 7 Firmware Build Information Page COh Vendor Specific 8 Subsystem Components Revision Page C1h Vendor Specific Figure 4 5 Supported Vital Product Data Pages Data Format 81 81200 02 REV A01 January 2005 4 19 INQUIRY Command 12h SDLT 600 SCSI Interface Guide Unit Serial Number Page 80h Figure 4 6 shows the format of the Unit Serial Number page the drive returns MS 6 5 4 3 2 1 0 0 Peripheral Qualifier Peripheral Device Type 1 Page Code 80h 2 Reserved 3 Page Length 10h 4 19 Serial Number Figure 4 6 Unit Serial Number Page Data Format Table 4 10 Unit Serial Number Page Field Descriptions Field Name Description Serial Number The serial number given is the serial number of the module or the drive typically beginning with MX indicating the site of manufacture If the drive serial number is valid it is reported otherwise the module serial number is reported The serial number appears on the bar code label The drive returns the serial number in ASCII
65. READ or VERIFY commands cause this bit to be set to 1 Sense Key The Sense Key values are described in Table 4 130 on page 4 220 Information Contains the difference residue between the requested length minus the actual length in bytes blocks or Filemarks as determined by the command Negative values are indicated by two s complement notation The bytes are valid for all READ WRITE SPACE and VERIFY commands for which the drive generated a CHECK CONDITION status AdditionalSense Specifies the number of additional sense bytes to follow If the value in the Length Allocation Length field of the CDB is too small to transfer all of the Additional Sense bytes the Additional Sense Length is not adjusted to reflect the truncation Command Command Specific Information bytes can be logged by the operating system Specific on error conditions On tape medium errors such an entry usually contains Information the current SCSI logical block address LBA AdditionalSense This field and the Additional Sense Code Qualifier field provide additional Code ASC information about the Sense Key and the cause of a CHECK CONDITION status Additional Sense Codes are listed in Table 4 131 on page 4 221 Additional Sense This field and the Additional Sense Code field provide additional Code Qualifier information about the Sense Key and the cause of a CHECK CONDITION ASCQ status Additional Sense Code Qualifiers are discussed in Table 4 131 on page 4 221
66. REQUEST However if the EEPROM parameter EnaRepDecomp is set the drive ignores the parameter in this field and does not return the CHECK CONDITION status Indicates which decompression algorithm the drive uses when decompressing data on the tape The only value currently supported is 10h Specifying a value other than 10h for this field causes the drive to return CHECK CONDITION status Sense Key set to ILLEGAL REQUEST 81 81200 02 REV A01 January 2005 4 83 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide 4 9 6 Device Configuration Page 10h The Device Configuration Page controls the tape drive s behavior on the SCSI bus and allows the host to tune bus performance ee E 6 5 4 3 2 1 0 0 PS 0 Rsv d Page Code 10h 1 Page Length 0Eh 2 Rsv d Obsolete CAF 0 Active Format 0 3 Active Partition 0 4 Write Buffer Full Ratio 5 Read Buffer Empty Ratio MSB 6 7 Write Delay Time LSB 8 DBR 0 BIS 1 RSmk 0 AVC 0 SOCF 0 RBO 0 REW 0 9 Gap Size 0 10 EOD Defined 0 EEG SEW SWP Reserved MSB 11 13 Buffer Size at Early Warning 0 LSB 14 Select Data Compression Algorithm 15 Reserved Rewind on Reset AsocWP PersWP PrmWP Figure 4 49 Device Configuration MODE SELECT Page Data Format 4 84 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Inte
67. Read Write Error Recovery 01h PER bit 0 0 1 Control Mode 0Ah Report Log Exception 0 0 1 Condition Control Mode 0Ah Autoload Mode 0 0 2 Data Compression 0Fh Data Compression Enable 1 0 1 Disconnect Reconnect 02h Maximum Burst Size 0080h 0000h FFFFh Disconnect Reconnect 02h DTDC 0 0 3 Device Configuration 10h Write Delay Time 64h 64h 1964h Device Configuration 10h Synchronize at Early 1 0 1 Warning Device Configuration 10h Select Data Compression 1 0 1 Algorithm TapeAlert 1Ch DExcpt 1 0 1 TapeAlert 1Ch Perf 0 0 1 TapeAlert 1Ch Test 0 0 1 TapeAlert 1Ch MRIE 3 0 6 TapeAlert 1Ch Test Flag 0 Vendor Specific Configuration 25h Default Density 0 0 FFh Override 81 81200 02 REV A01 January 2005 4 105 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide Table 4 59 Changeable Mode Parameters Within MODE SELECT Continued Page Parameter Default Minimum Maximum Disaster Recovery 3Ch DRAct 0 0 1 1 All values between the minimum and maximum must be an even multiple of 4 4 106 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 10 MODE SENSE 6 10 Command 1Ah 5Ah The MODE SENSE command allows the SDLT tape drive to report its media type and current or changeable configuration parameters to the host It is a complementary command to MODE SELECT The CDB for the 6 byte M
68. Sense Code Qualifiers ASCQs that the drive may report Additional information explanations or suggestions for action are included with some of the descriptions Table 4 131 Supported ASC ASCQ Hex for REQUEST SENSE Command Text Name Sense Key ASC ASCQ Description NO SENSE 00h 00h 00h No Additional Sense Code 00h Olh FileMark Encountered 00h 02h End of Medium EOM Encountered 00h 03h SetMark Encountered 00h 04h Beginning of Medium BOM Encountered 00h 05h EOD Encountered 00h 16h Operation in Progress 30h 05h Cannot Write Medium Incompatible Error 5Dh 00h TapeAlert Failure Prediction Threshold Exceeded 5Dh FFh False Exception Condition RECOVERED Olh 00h 17h Clean Requested Non Vendor Specific ERROR OAh 00h Error Log Overflow OAh 80h Error Log Generated 37h 00h Rounded Parameter 3Bh 08h Repositioning Error 44h Cih EEPROM Copy 1 Area Bad 44h C2h EEPROM Copy 2 Area Bad 47h 00h SCSI Parity Error 48h 00h IDE Message Received 51h 00h ERASE Failure 53h 01h Unload Tape Failure 5Bh Olh Threshold Condition Met 5Bh 02h Log Counter at Maximum 5Dh 00h Failure Predictive Threshold Exceeded 5Dh FFh Failure Predictive Threshold Exceeded False 81 81200 02 REV A01 January 2005 4 221 REQUEST SENSE Command 03h SDLT 600 SCSI Interface Guide Table 4 131 Supported ASC ASCQ Hex for REQUEST SENSE Command Continued Text Name Sense Key ASC ASCQ Description NOT READY 02h 04h 00h Unit Not Ready C
69. WRITE error prevented the directory from being Invalid at Unload updated when the drive unloaded the tape 1 Severity levels are Informational Warning and Critical Informational flags provide a status type message Warning flags indicate that there is the possibility of loss of data and Critical flags indicate the possibility of loss of data and that user intervention a service call or both may be required January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 8 8 Read Write Compression Log Page 32h This page begins with a 4 byte header followed by the log parameter blocks of 6 or 8 bytes depending on the parameter code selected Bit Byte 7 6 5 4 3 1 0 0 Page Code 32h 1 Reserved MSB 2 3 Additional Length LSB Figure 4 29 Read Write Compression Ratio LOG SENSE Page Header Format Table 4 34 Read Write Compression Ratio LOG SENSE Header Field Descriptions Field Name Description Page Code Echoes the page code specified in the LOG SENSE CDB Additional Length Specifies the number of bytes available and depends on the parameters requested Bit Byte 7 6 5 4 3 1 0 MSB 0 1 Parameter Code LSB 2 DU DS TSD ETC TMC LBIN LP 3 Parameter Length 02h MSB 4 5 Compression Ratio x 100 LSB Figure 4 30 Log Parameters Format for Read Write
70. at the request speed The maximum supported synchronous period is 5Dh 372 nsec A request with a Transfer Period less than this returns a request for asynchronous mode Table 3 9 Transfer Periods and Transfer Rates Transfer Period Transfer Rate OAh 40 MHz 25 nsec Transfer Period OBh 33 MHz 30 3 nsec Transfer Period Super DLTtape uses 37 5 nsec period OCh 20 MHz 50 nsec Transfer Period O0Dh 5Dh 4 Transfer Period nsec The drive s minimum supported value for Transfer Period is 0Ah when the bus is operating in LVD mode When operating in SE Single Ended mode the minimum Transfer Period value is 0Ch When the Transfer REQ ACK value is non zero the drive will transfer data using synchronous transfers a Transfer REQ ACK offset value of zero indicates asynchronous transfers If the host requests a Transfer REQ ACK offset value greater than the maximum value that the drive supports the drive responds with the maximum value that it supports 81 81200 02 REV A01 January 2005 3 13 Supported SCSI Messages SDLT 600 SCSI Interface Guide 3 2 16 WIDE DATA TRANSFER REQUEST extended message 03h Figure 3 6 illustrates the message formats pe 6 5 4 3 2 1 0 0 Extended Message Identifier 01h see Figure 3 1 1 Extended Message Length 02h 2 WIDE DATA TRANSFER REOUEST 03h 3 Transfer Width Ezponent Figure 3 6 WIDE DATA TRANSFER REOUEST Message Data Format
71. bytes contained in this log page excluding the 4 bytes that make up the header Bit Byte 7 6 5 4 3 2 1 0 MSB 0 1 Parameter Code LSB 2 DU DS TSD ETC TMC LBIN LP 3 Parameter Length MSB 4 n ASCII String for Event n LSB 1 The byte 2 fields are collectively referred to as the Parameter Control Byte For definitions of the bits that compose the Control Byte the byte 2 in the above figure refer to Read Page 03h Write Page 02h Error Log Page on page 4 43 Figure 4 22 Log Parameters Format for Last n Error Events LOG SENSE Page Table 4 26 Log Parameters for Last n Error Events LOG SENSE Page Field Descriptions Field Name Description Parameter Code Parameter Code values are assigned from 0 to 63 decimal where 0 is the oldest event stored and the highest Parameter Code returned is the most recent event ASCII String for The text of the parameter includes a Packet 7 that is a value from 0 to Event n 255 The drive assigns this internal number when the packet is written to EEPROM A value of 0 is normally the oldest packet but packet numbers wrap back to 0 after reaching 255 4 48 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 8 5 Sequential Access Device Log Page OCh This page provides a standardized way to report the amount of data transferred between the tape d
72. cleared 81 81200 02 REV A01 January 2005 4 33 LOG SELECT Command 4Ch SDLT 600 SCSI Interface Guide 4 7 3 LOG SELECT Log Page Format Each log page begins with a 4 byte header followed by number of log parameter blocks one block for each parameter code Each block except for parameter code 05h comprises 8 bytes The parameter block for page code 05h is 12 bytes regal err 6 5 4 3 2 1 0 0 Page Code 1 Reserved MSB 2 3 Page Length n 3 LSB Log Parameters 4 Log Parameter First x3 Length x n y l Log Parameter Last n Length y Figure 4 15 LOG SELECT Log Page Data Format Table 4 20 LOG SELECT Log Page Header Field Descriptions Field Name Description Page Code Specifies the log page to which this LOG SELECT command is directed Page Length Specifies the total number of bytes contained in this log page not including the 4 bytes that make up the header Log Use one block for each parameter code Parameters 4 34 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Bit Byte 7 6 5 4 3 2 1 0 MSB 0 1 Parameter Code LSB 2 DU DS TSD ETC TMC LBIN LP 3 Parameter Length n 3 MSB 4 n Parameter Value LSB 1 The byte 2 fields are collectively referred to as the Parameter Control byte Figu
73. data bytes written to the media during WRITE command operations not counting ECC and formatting overhead 0002h Tape Read Byte Count The number of data bytes read from the media during READ command operations not counting ECC and formatting overhead 0003h Host Read Byte Count The number of data bytes transferred to the initiator s during READ command operations Disable Update Always set to 0 Disable Save Not supported Always set to 1 Target Save Disable Not supported Always set to 1 Enable Threshold Comparison Threshold checking is not supported on this page Always set to 0 Threshold Met Criteria Ignored Always set to 0 List Parameter The drive treats the parameter codes as data counters Always set to 1 Specifies the number of bytes in the parameter value All parameters are 8 bytes in length Indicates the actual value of this log parameter 4 50 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 8 6 Temperature Log Page ODh This page provides a standardized way to report the device temperature B 7 6 5 4 3 2 1 0 0 Page Code 0Dh 1 Reserved MSB 2 3 Page Length LSB Figure 4 25 Temperature LOG SENSE Page Header Format Table 4 29 Temperature LOG SENSE Header Field Descriptions Field Name Description Page Code Echoes the
74. data counter reaches its maximum value the drive does not increment it further If a data counter is at or reaches its maximum value during the successful execution of a command and if the RLEC bit on the Control Mode page is set to 1 the drive terminates the command with a CHECK CONDITION status Sense Key set to RECOVERED ERROR and Additional Sense Code set to LOG COUNTER AT MAXIMUM When set to 1 indicates that the parameter is a list parameter Power on hours when CHECK CONDITION status occurred This is the number of power on hours since the last time the drive was powered on not total number of hours during the lifetime of the drive The time stamp counter is updated once per hour If the drive is powered down before the hourly update occurs the update does not occur until a full hour after power is re applied Internal media identifier being used when CHECK CONDITION status occurred A value of 0 indicates no media or unknown media when the event occurred Note that this is not a legitimate method of tracing media The Sense Keys are described in Table 4 130 on page 4 220 The Additional Sense Codes are described in Table 4 131 on page 4 221 The Additional Sense Code Qualifiers are described in Table 4 131 on page 4 221 Not used 81 81200 02 REV A01 January 2005 4 63 LOG SENSE Command 4Dh SDLT 600 SCSI Interface Guide 4 8 10 Device Status Log Page 3Eh This page describes the current status of th
75. drive returns tape cleaning flags for TapeAlert When set to 0 this functionality is disabled EnaGranularity Binary 1 1 Enables the Granularity field in the READ BLOCK LIMITS command EnalnitSyncNe Binar 0 1 When set to 1 enables target initiated synchronous negotiation EnaModePg22 Binary 0 1 Enable vendor specific data compression Status Mode Page EnaModePg3C Binary 1 1 Enable Disaster Recovery Mode Page 3Ch 81 81200 02 REV A01 January 2005 4 99 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide Table 4 58 EEPROM Vendor Specific MODE SELECT Page Parameter Descriptions Data Length Parameter Name Type Default Bytes Usage EnaReadPosLong Binary 1 1 Enable Long Data Format in READ POSITION command EnaRepDecomp Binary 0 1 If set and the drive is in Read mode the decompression algorithm field in Data Compression mode is reset if the drive decompressed the last block the host requested otherwise the drive clears the Decompression Algorithm field in Data Compression mode EnaReqAckActNeg Binary 1 1 Enables active negation on REQ and ACK signals EnaSCSIFilter Binary 1 1 Enables the SCSI filter on the SCSI chip EnaSCSIUnlonPMR Binary 0 1 When set to 1 enables a SCSI UNLOAD when a previous PREVENT MEDIUM REMOVAL command is in effect EnaSoftClean Binary 0 1 When set to 1 periodic cleaning of the read write heads is enabled When set to 0 this functionality is
76. ed rele a co Goan uhu katia foe pte ah forte Sa 1 3 For More Information WA en een ahhh 1 3 Reader Comments eoriet II hk aod Ue V atonal ce dor UE ys oce ea ae e d h 1 4 2 SCSI Parallel Protocol 2 1 Background Information About SCSI 2 1 Information Transfer Phases 2 2 SCSI Bus Conditions AA ARCET RR AUS n e a AL 2 2 Attention Conditions eol We RW r ES nS os MPEG AEN E AS 2 2 Reset Condition va qu ea dee be ae e aee eda he p ody d d E e 2 4 3 SCSI Messages ouri PT 3 1 Message Format AA dn kd en eR re eR GU Ged Fach Gin Rede RC RU a EU RUERUR 3 1 Supported SCSI Messages lisse rra 3 3 ABORT TASK SET 06h iii ccc ccc cee etn rr 3 4 TARGET RESET OCH 05 60 ee etd eee hw Abd Rede ed Dba Me Mea he eed Hoa Xe 3 5 TASK COMPLETE 00h 4 rice duci s ee de dod Pe Bs a die dye e td 3 5 DISCONNECT 04h ii eda eae dw Ga anaes cie a eU pepe de 3 5 IDENTIFY 80h FEh iL oRbRRReeeib v9 banc E bake ened PPP C eevhPP WT 3 6 IGNORE WIDE RESIDUE 23h 3 7 INITIATOR DETECTED ERROR 05h 3 7 LOGICAL UNIT RESET 17h 44 1 i be e Ue ace Eu qd ER a eps 3 8 81 81200 02 REV A01 January 2005 v Table of Contents SDLT 600 SCSI Interface Guide MESSAGE PARITY ERROR 09h ev c danced OCURRA OC RACE ARE AEN wale ew R
77. enters the message in phase and returns MESSAGE REJECT 81 81200 02 REV A01 January 2005 3 11 Supported SCSI Messages SDLT 600 SCSI Interface Guide 3 2 15 SYNCHRONOUS DATA TRANSFER REQUEST extended message 01h This extended message allows the SDLT tape drive and initiator to agree on the values of the parameters relevant to synchronous transfers The SYNCHRONOUS DATA TRANSFER REQUEST message has the format shown in Figure 3 5 NOTE The ANSI SPI 4 standard prohibits target devices from initiating negotiations using the PARALLEL PROTOCOL REQUEST message Instead targets are required to negotiate using the WIDE DATA TRANSFER REQUEST and SYNCHRONOUS DATA TRANSFER REQUEST messages The SDLT tape drive initiates negotiations starting with a WIDE DATA TRANSFER REQUEST message before transferring any data if transfer parameters have not been established or have been lost See SPI 4 prs 7 6 5 4 3 2 1 0 0 Extended Message Identifier 01h see Figure 3 1 1 Length 03h 2 SYNCHRONOUS DATA TRANSFER REOUEST 01h 3 Transfer Period 4 Transfer REO ACK Offset Figure 3 5 SYNCHRONOUS DATA TRANSFER REOUEST Message Data Format A SCSI device initiates a SYNCHRONOUS DATA TRANSFER REQUEST message exchange whenever a previously arranged transfer agreement may have become invalid The agreement becomes invalid after any condition that may leave the data transfer agreement in an indetermina
78. equivalent density code value If no secondary density code exists the drive returns the primary device code value in this field Write OK When set to 0 indicates that the drive does not support writing to the media at this density When set to 1 indicates that the drive 1s capable of writing at this density to either the currently mounted medium if the Media bit in the Command Block Descriptor is set to 1 or to any media if the Media bit in the Command Block Descriptor is set to 0 Note that all density code values the REPORT DENSITY SUPPORT command returns are supported for READ operations Duplicated When is set to 0 indicates that this Primary Density Code has exactly one density support data block When set to 1 indicates that this Primary Density Code is specified in more than one density support data block Default When set to 0 indicates that this is not the default density of the drive If either the Primary Density Code or the Secondary Density Code fields are set to 0 this bit is set to 1 If neither the Primary nor Secondary Density Code fields are set to 0 and this bit is set to 1 the drive accepts a MODE SELECT header with a density code of 00h as equivalent to the Primary and Secondary Density Codes The default density of the drive may vary depending on the currently mounted media Multiple codes may return a Deflt bit of 1 when the Media field is set to 0 since more than one default may be possible Ind
79. format 4 20 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Device Identification Page 83h Figure 4 7 shows the format of the Device Identification page the drive returns ict 7 6 5 4 3 2 1 0 0 Peripheral Oualifier Peripheral Device Type 1 Page Code 83h 2 Reserved 3 Page Length 4 n Identification Descriptors Figure 4 7 Device Identification Page Data Format Table 4 11 Device Identification Page Field Descriptions Field Name Description Peripheral Contains 000b if the command is directed to a valid device Contains 011b if Qualifier there is no device at the selected LUN Peripheral Contains 01h if the LUN is 0h 8h if the LUN selects an attached library or Device Type 1Fh if there is no device at the selected LUN Page Code A value of 83h identifies this as the Device Identification page Page Length Indicates the size of the returned Device Identification page Identification The drive always returns the Vendor unique Logical Unit Identifier and the Descriptors Logical Unit NAA Identifier It may also return other identifiers The following identifiers are described in this section e Vendor unique Logical Unit Identifier Logical Unit NAA Identifier 81 81200 02 REV A01 January 2005 4 21 INQUIRY Command 12h SDLT 600 SCSI Interface Guide Vendor unique Logical Unit Identifier Figure 4 8
80. from any initiator that have been accepted by the drive as non conflicting continue their normal executions A UNIT ATTENTION condition is established for all registered initiators for the logical unit The Sense Key is set to UNIT ATTENTION and the Additional Sense Code is set to RESERVATIONS PREEMPTED Applications should not use the Clear service action except during recoveries associated with initiator or system reconfiguration as this may compromise data integrity 81 81200 02 REV A01 January 2005 4 145 PERSISTENT RESERVE OUT Command 5Fh SDLT 600 SCSI Interface Guide Table 4 83 PERSISTENT RESERVE OUT Command s Service Action Descriptions Continued Code Name Description 04h Pre empt A PERSISTENT RESERVE OUT command with a successful Pre empt service action removes all persistent reservations for all initiators that have been registered with the service action Reservation Key specified in the PERSISTENT RESERVE OUT command s parameter list A persistent reservation is also established for the pre empting initiator Any commands from any initiator that the drive has accepted as non conflicting continue their normal executions If an initiator sends a PERSISTENT RESERVE OUT command that specifies a Pre empt service action and no persistent reservation exists for the initiator identified by the service action Reservation Key it is not an error condition A UNIT ATTENTION condition is established fo
81. health checks See Code Table 4 136 on page 4 235 for specific information PF Page Format Not supported Must be set to 0 Selftst Self Test Used with DevOfl and UnitOfl to specify the type of testing to be done See Table 4 136 on page 4 235 for specific information DevOfl Device Offline Used with Selftst and UnitOfl to specify the type of testing to be done See Table 4 136 on page 4 235 for specific information UnitOfl Unit Offline Used with Selftst and DevOfl to specify the type of testing to be done See Table 4 136 on page 4 235 for specific information Parameter For this command always set to 0 signifying that only default parameters are List Length used 81 81200 02 REV A01 January 2005 4 233 SEND DIAGNOSTIC Command 1Dh SDLT 600 SCSI Interface Guide 4 31 1 Level 7 Test Electronics Test Running a Level 1 test requires that a major portion of the controller hardware and software be functioning properly The Level 1 test is based on the premise that full power up testing is not necessary therefore it is an extension of the power on tests that the drive runs The test verifies the controller software Error Detection Code EDC and checks one queue that much of the controller software uses by dequeuing and enqueuing items The test also runs a cache memory test Finally this test checks the status of the servo subsystem by sending a STATUS command to the servo and interpreting the results The Level 1 test
82. indicated If the Sense Key is NO SENSE and the Additional Sense Code field is OPERATION IN PROGRESS this field indicates the progress toward completion as the numerator of a fraction with 65 536 as the denominator Vendor specific Reports the number of tape motion head wear hours Format is given as a hexadecimal word 2 bytes Reports the total number of hours that drive power has been applied over the drive s lifetime Format is given as a hexadecimal longword 4 bytes Reports the amount of tape remaining in 4 KB 4096 bytes blocks 81 81200 02 REV A01 January 2005 4 219 REQUEST SENSE Command 03h SDLT 600 SCSI Interface Guide Table 4 130 Supported Sense Keys for REQUEST SENSE Command Sense Key Description Oh lh 2h 3h 4h 5h 6h 7h 8h Bh Dh NO SENSE Check the Filemark EOM ILI Additional Sense Code and Additional Sense Code Qualifier fields RECOVERED ERROR Can result from rounding of Mode Parameters on a MODE SELECT command or may report that READ WRITE error rates are reaching drive specification limits for optimal operation The drive may still be able to continue to function without any unrecovered errors for a long period of time however The drive generates a CHECK CONDITION status only if the PER field of Mode Page 01h is set to 1 NOT READY The tape medium is not ready for tape operation commands The tape medium might not be present in the drive or
83. list contained in the Data Out List Length Buffer A Parameter List Length of 0 indicates that no parameter data is present this is not considered an error If the Parameter List Length results in the truncation of an attribute the drive terminates the WRITE ATTRIBUTE command with a CHECK CONDITION status The Sense Key is set to ILLEGAL REQUEST and the Additional Sense Code is set to PARAMETER LIST LENGTH ERROR The parameter list has the format shown in Figure 4 134 Bit Byte 0 0 3 Parameter Data Length n 3 LSB 4 Attribute 0 n Attribute n Figure 4 134 WRITE ATTRIBUTE Parameter List Format 4 246 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 145 WRITE ATTRIBUTE Command Parameter Data Field Descriptions Field Name Description Parameter Ignored Contains the number of bytes of attribute data Data Length Attribute Contains 1 an attribute header and 2 data Each attribute must be formatted as described in Enhanced Medium Auxiliary Memory EMAM Attributes on page 4 163 4 37 1 Error Summary for the WRITE ATTRIBUTE Command If there is not enough space to write the attributes to the medium auxiliary memory no attributes are changed and the WRITE ATTRIBUTE command terminates with a CHECK CONDITION status The Sense Key is set to ILLEGAL REQUEST and the Additional Sense Code is set to AUXILIARY MEMORY OUT O
84. may be in the process of loading or calibrating MEDIUM ERROR An unrecoverable WRITE READ or positioning error occurred Detailed device specific information may be available HARDWARE ERROR The Additional Sense Code Additional Sense Code Qualifier fields may present more specific information ILLEGAL REQUEST The CDB or supplied parameter data specified an unsupported or illegal operation Check the Byte Pointer and Bit Pointer fields for an indication of the field in error UNIT ATTENTION The drive generates Unit Attentions after a device reset if 1 the medium asynchronously becomes ready to the initiator 2 if another initiator changes Mode Parameters 3 if the firmware is updated or 4 if the latter two items occur together DATA PROTECTED The current tape medium is write protected Either the Write Protect switch on the cartridge is in its enabled position the tape medium is not the appropriate type or a software write protect is in effect BLANK CHECK The drive encountered End of Data or a blank tape COMMAND ABORTED Generated when the drive aborts a command VOLUME OVERFLOW Indicates that the drive reached the physical end of tape medium during writing The initiator ignored the End of Medium condition and continued to write to the tape 4 220 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 131 provides the Additional Sense Codes ASCs and Additional
85. must be set after the cartridge is loaded After being set its value overrides any application resetting the drive to default density 0 with the MODE SELECT command January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 9 12 Disaster Recovery Control Page 3Ch This page controls the operation of the Disaster Recovery Control Mode for the tape drive a 7 6 5 4 3 2 1 0 0 PS 0 Rsv d Page Code 3Ch 1 Page Length 4 2 Reserved DRAct BIS Reserved Figure 4 55 Disaster Recovery Control MODE SELECT Page Data Format Table 4 57 Disaster Recovery Control MODE SELECT Page Field Descriptions Field Name Description PS Parameters Savable Must be set to 0 Page Code Identifies the type of MODE SELECT page being transferred A value of 3Ch identifies this as the Disaster Recovery Control Page Page Length Indicates the number bytes in the page excluding bytes 0 and 1 The length is returned in MODE SENSE commands and must subsequently be set to the same value when performing MODE SELECT If the drive receives an unexpected page length value it returns a CHECK CONDITION status with Sense Key set to ILLEGAL REQUEST DRAct Disaster Recovery Active Set to 0 to disable Disaster Recovery mode Set to 1 to enable Disaster Recovery mode 81 81200 02 REV A01 January 2005 4 97 MODE SELECT 6 10 Command 15h 55h
86. of the following events causes the timer after it is started not to reset or reload before it expires Ifthere is a REQ transition when there are no outstanding REQs waiting for an ACK load and start the timer e fthere is a REQ transition when there are any outstanding REQs waiting for an ACK there is no effect on the timer Ifthere is an ACK transition when there are outstanding REQs waiting for an ACK load and start the timer e If after an ACK transition there are no outstanding REQs waiting for an ACK stop the timer A value of 0000h indicates that this functionality is disabled A value of FFFFh indicates an unlimited timeout period 4 128 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands TapeAlert Page 1Ch The TapeAlert configuration settings can be read using the MODE SENSE command s TapeAlert Page Bit Byte 7 6 5 4 3 2 1 0 0 PS 0 Rsv d Page Code 1Ch 1 Page Length OAh 2 Perf Rsv d EBF EWASC DExcpt Test Rsv d LogErr 3 Reserved MRIE MSB 4 7 Interval Timer LSB MSB 8 11 Report Count Test Flag Number LSB Figure 4 72 TapeAlert MODE SENSE Page Data Format 81 81200 02 REV A01 January 2005 4 129 MODE SENSE 6 10 Command 1Ah 5Ah SDLT 600 SCSI Interface Guide Table 4 73 TapeAlert MODE SENSE Page Field Descriptions Field Name Description
87. on page 4 192 Allocation Valid only when Service Action is set to 08h The value in this field specifies the maximum Length length of the parameter data the drive returns If the value in this field is not sufficient to contain all of the returned parameter data the drive returns truncated parameter data 81 81200 02 REV A01 January 2005 4 189 READ POSITION Command 34h SDLT 600 SCSI Interface Guide 4 18 1 Read Position Data Short Form Data returned when the service action value is 00h or O1h takes the following form Bit Byte 7 9 0 BOP EOP LOCU BYCU Rsv d LOLU PERR Rsv d 1 Partition Number 13 Reserved MSB 4 7 First Logical Object Location LSB MSB 8 11 Last Logical Object Location LSB 12 Reserved MSB 13 15 Number of Logical Objects in Object Buffer LSB MSB 16 19 Number of Bytes in Object Buffer LSB Figure 4 100 READ POSITION Short Form Data Format Table 4 111 READ POSITION Short Form Data Field Descriptions Field Name Description BOP Beginning of Partition When set to 1 indicates that the drive is at the Beginning of Partition BOT in the current partition When set to 0 indicates that the current logical position is not at BOT Since SDLT tape drives do not support more than one partition the value of this bit is when at BOT EOP End of Partition When set to 1 indicates that the drive is positioned between early warning an
88. persistent reservation capability information Capabilities A Read Keys service action requests that the drive return a parameter list that includes a header and a complete list of all of the reservation keys currently registered with the drive If multiple initiators have registered with the same key the key is listed multiple times once for each registration Refer to Figure 4 77 on page 4 137 and Table 4 78 on page 4 138 for information about Read Keys parameter data A Read Reservations service action requests that the drive return a parameter list that contains a header and a complete list of all persistent reservations presently active in the drive Refer to Figure 4 78 on page 4 138 and Table 4 79 on page 4 139 for information about Read Reservations parameter data This field indicates how much space is reserved for the returned parameter list Read Keys or Read Reservations parameters The actual length of the parameter data is indicated in the parameter data field for those parameters If the Allocation Length is not sufficient to contain the entire list of parameters the drive returns a truncated list If the remainder of the list is required the host must send anew PERSISTENT RESERVE IN command with an Allocation Length field value large enough to contain the entire list of parameters 4 136 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands The figure and table below illu
89. returned command The first byte contains the Usage Data operation code of the returned command If the returned command has a service action the service action code is placed in this field in the exact location that the service action code appears in the returned command CDB The remaining bytes in this field contain a usage map of the fields in the CDB of the returned command If the drive evaluates a bit the corresponding bit in this field is set to 1 If the drive ignores or treats a bit as reserved the corresponding bit in this field is set to 0 If a field contains more than one bit the drive fills all bits in that field with the same value 81 81200 02 REV A01 January 2005 4 213 REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS Command A3h SDLT 600 SCSI Interface Guide 4 26 REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS Command A3h The REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS command requests information on task management functions the SDLT tape drive supports Bit Byte 7 0 0 Operation Code A3h 1 Reserved Service Action 0Dh MSB 2 5 Reserved LSB MSB 6 9 Allocation Length 4h or larger LSB 10 Reserved 11 Control Figure 4 118 REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS Command Descriptor Block Data Format 4 214 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 126 REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS
90. returns the Additional Sense Code ECHO BUFFER OVERWRITTEN if the data being read from the Echo Buffer is not the data previously written by the same initiator Buffer Capacity Always returns 252 indicating the size of the Echo Buffer 4 188 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 18 READ POSITION Command 34h The READ POSITION command reads a position identifier or SCSI Logical Block Address LBA The LOCATE command uses this identifier or LBA for high performance repositioning of the tape medium to a known logical position el 6 5 4 3 2 1 0 0 Operation Code 34h 1 Reserved Service Action 2 6 Reserved MSB 7 8 Allocation Length LSB 9 Control Figure 4 99 READ POSITION Command Descriptor Block Data Format Table 4 110 READ POSITION Command Descriptor Block Field Descriptions Field Name Description Service Determines the format of the positional data the drive returns All values other than those listed Action below are reserved Value Description 00h The drive returns 20 bytes of data in the format described in Read Position Data Short Form on page 4 190 Olh The drive returns 20 bytes of data in the format described in Read Position Data Short Form on page 4 190 06h The drive returns 32 bytes of data in the format described in Read Position Data Long Form
91. the application client doing the examination Contains the count of the number of bytes that are in the Reservation Key list bytes 8 n Note that this field contains the number of bytes in the reservation key list regardless of the value prescribed by the Allocation Length field in the command s CDB All of the Reservation Keys appear as items in a list as bytes 8 through n Each entry reflects an 8 byte reservation key registered with the drive using the PERSISTENT RESERVE OUT Register or Register and Ignore Existing Key service actions The application client can examine each key for correlation with a set of initiators and SCSI ports The following figure and table illustrate and describe the data fields of Read Reservations data parameters mss 6 5 4 3 2 1 0 MSB 0 3 PRGeneration LSB MSB 4 7 Additional Length n 7 LSB MSB 8 n Reservation Descriptors LSB Figure 4 78 PERSISTENT RESERVE IN Read Reservations Parameters Data Format 4 138 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 79 Read Reservations Parameters Field Descriptions Field Name Description PRGeneration Additional Length Reservation Descriptors Persistent Reservations Generation The value in this field is a 32 bit counter in the drive that is incremented each time a PERSISTENT RESERVE OUT command reque
92. the SCSI bus Read Data from the Saved Buffer A1h The Ath buffer the saved buffer contains information saved from an event that caused the drive to unexpectedly reset Use Mode 3 to test for event data The event data is not actually generated with this first READ BUFFER command instead the size of the data is returned Note If the length of this buffer is 0 an unexpected reset event has not occurred Read Data from the Live Buffer A2h The A2h buffer the live buffer contains the latest information about the current state of the tape drive The buffer is populated each time a READ BUFFER command using Mode 3 with the A2h buffer ID Is received by the drive The information in this buffer is most useful when an error occurred that did not cause an unexpected reset of the drive for example a Hard Read Error HRE or a Hard Write Error HWE The buffer contains actual event data Note that retrieving this information overwrites any other saved event information so it is best to check the size of the Saved Buffer first to check if there is any useful information available do this with a Mode 3 READ BUFFER command described in Descriptor Mode 03h on page 4 187 81 81200 02 REV A01 January 2005 4 185 READ BUFFER Command 3Ch SDLT 600 SCSI Interface Guide Compression To reduce memory requirements for the diagnostic read buffers and to reduce the size of the resulting diagnostic information the Live Buffer A2h
93. the SDLT tape drive in this case for interface management and command elaboration and qualification Chapter 4 SCSI Commands describes in detail each command supported by SDLT tape drives The SCSI command system enables a SCSI initiator to direct an SDLT tape drive to perform a wide range of operational and diagnostic functions This chapter also provides Sense Key and Additional Sense Code information for the REQUEST SENSE and SEND DIAGNOSTIC SCSI commands as well as density codes for the MODE SELECT and MODE SENSE commands 1 2 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 1 Introduction 1 5 Conventions This manual uses the following conventions to designate specific elements Table 1 1 Typographical Conventions Element Convention Example Commands Uppercase unless case TEST UNIT READY sensitive Messages Uppercase IDENTIFY Hexadecimal Notation Number followed by 25h lowercase h Binary Notation Number followed by 101b lowercase b Decimal Notation Number without suffix 512 Acronyms Uppercase POST Abbreviations Lowercase except where Mb megabits standard usage requires MB megabytes uppercase 1 6 For More Information The web site http Avww dlttape com includes information about the various DLTtape systems available for purchase To locate specific product related support information or to register your tape drive visit http Avww quantum com AM supporv Once you are regi
94. to 1 When set to 0 indicates that compression is defaulted OFF at power on reset When set to 1 indicates that compression is defaulted ON at power on reset Default fixed block size 4 98 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 58 EEPROM Vendor Specific MODE SELECT Page Parameter Descriptions Data Length Parameter Name Type Default Bytes Usage DefSEW Binary 1 1 Default Synchronize at Early Warning parameter DisDeferCInRpt Binary 0 1 When set to 1 the drive sends a cleaning report over the library port as soon as the cleaning light illuminates When set to 0 the drive sends the report only at unload DisUnbufMode Binary 0 1 When set to 1 the drive completely disables unbuffered mode it ignores the MODE SELECT buffered mode selection to turn off buffered mode When set to 0 buffered mode can be enabled or disabled EnablePPRMsg ASCII 0 1 Not used EnaCleanLib Binary 1 1 When set to 1 the drive reports cleaning status using the library tape drive interface When set to 0 this functionality is disabled EnaCleanLight Binary 1 1 When set to 1 the Cleaning Required LED is turned on and off as appropriate When set to 0 this functionality is disabled EnaCleanSense Binary 1 1 When set to 1 the drive collects cleaning Sense Key data When set to 0 this functionality is disabled EnaCleanTA Binary 1 1 When set to 1 the
95. to initialize host resident software that allows determination of e The log pages the drive uses e The parameter codes and length of each parameter The following conditions constitute errors in the parameter block that cause the drive to return CHECK CONDITION status with Sense Data set to ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN PARAMETER LIST e The drive receives a page header with unsupported page codes e An incorrect log page length is specified in the page header Anillegal parameter code is contained in a valid page code e Parameter codes for a supported page are not sent in ascending order e The LP bit is set to 1 in the parameter control byte e The DS bit is set to 0 in the parameter control byte The TSD bit is set to 0 in the parameter control byte 4 38 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 8 LOG SENSE Command 4Dh The LOG SENSE command allows the host to retrieve statistical information the SDLT tape drive maintains about its own hardware parameters or about the installed tape medium This command complements the LOG SELECT command Bit Byte 7 6 5 4 3 2 1 0 0 Operation Code 4Dh 1 Reserved PPC SP 0 2 PC Page Code 3 4 Reserved MSB 5 6 Parameter Pointer LSB MSB 7 8 Allocation Length LSB 9 Control Figure 4 17 LOG SENSE Command Descriptor Bl
96. until replaced by another valid SET DEVICE IDENTIFIER command 4 238 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 33 SPACE Command 11h The SPACE command provides a variety of positioning functions that are determined by the Code and Count fields in the Command Descriptor Block This command provides both forward toward End of Medium End of Partition and reverse toward Beginning of Medium Beginning of Partition positioning Bit Byte 7 6 5 4 3 p 1 0 0 Operation Code 11h 1 Reserved Code MSB 2 4 Count LSB 5 Control Figure 4 129 SPACE Command Descriptor Block Data Format Table 4 141 SPACE Command Data Field Descriptions Field Name Description Code The code can be one of the following values All other values are reserved Space Code Space By 0000b Logical Blocks 0001b Filemarks 0010b Sequential Filemarks 0011b End of Data 0100b Setmarks 0101b Sequential Setmarks 81 81200 02 REV A01 January 2005 4 239 SPACE Command 11h SDLT 600 SCSI Interface Guide Table 4 141 SPACE Command Data Field Descriptions Continued Field Name Description Count When spacing over Blocks or Filemarks the Count field is interpreted as follows A positive value n causes forward motion over n blocks or filemarks The drive logically positions the tape after the nth Block or Filema
97. value of 1 in the first byte indicates the beginning of a multiple byte extended message The minimum number of bytes sent for an extended message is three The extended message format is shown in Figure 3 1 and the data fields are described in Table 3 2 Bus 6 5 4 3 2 1 0 0 Extended Message 01h 1 Extended Message Length 2 Extended Message Code 3 to n 1 Extended Message Arguments Figure 3 1 Extended Message Data Format 3 2 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 3 SCSI Messages Table 3 2 SDLT Tape Drive Extended Message Field Descriptions Field Description Extended This field specifies the length in bytes of the Extended Message Code plus the Extended Message Message Arguments that follow The total length of the message is equal to the Extended Length Message Length plus 2 A value of 0 for the Extended Message Length indicates that 256 bytes follow Extended The drive supports the following Extended Messages Message SEa Code Code Description Olh Synchronous Data Transfer Request 03h Wide Data Transfer Request 04h Parallel Protocol Request 3 2 Supported SCSI Messages The SDLT tape drive supports the messages listed in Table 3 3 The message code and the direction of the message flow is also included in the table In target to initiator Out initiator to target This section describes each message the drive suppo
98. value returned in the Maximum Additional Partitions field Only one partition is supported therefore this field must be set to 0 Fixed Data Partitions Must be set to 0 Select Data Partitions Must be set to 0 Initiator Defined Partitions Must be set to 0 Partition Size Unit of Measure Must be set to 0 Partition on Format Not supported Must be set to 0 Not supported Must be set to 0 Additional Defined Data Partitions Not supported Must be set to 0 Valid only for MODE SENSE and is set to 01h indicating that the drive supports Medium Format Recognition Not supported Must be set to 0 Not supported Must be set to 0 4 88 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 9 8 Logical Unit Control Page 18h The Logical Unit Control Page contains the logical unit control parameters for READ and WRITE operations p 7 6 5 4 3 2 1 0 0 PS SPF 0 Page Code 18h 1 Page Length 06h 2 Reserved Protocol Identifier 1h 3 7 Reserved Figure 4 51 Logical Unit Control MODE SELECT Page Data Format Table 4 53 Logical Unit Control MODE SELECT Page Field Descriptions Field Name Description PS Parameters Savable Not supported Must be set to 0 SPF SubPage Format Always set to 0 Indicates that the drive uses the page 0 page format Page Code Identifies the type of MODE SELECT page being trans
99. 0 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 8 Standard Inquiry Data Page Field Descriptions Continued Field Name Value Description VS 0 Vendor Specific Both VS bits are always set to 0 MultiP 0 Multi Port The drive is a single port device that does not implement multi port requirements Always set to 0 MChnger 0 Medium Changer The drive does not support attached medium changer commands sent to the drive s LUN Always set to 0 Addr16 1 16 bit Addressing Always set to 1 to indicate that the drive supports 16 bit wide SCSI addresses RelAdr 0 Relative Addressing Not supported Always set to 0 WBus 16 1 Wide Bus 16 Always set to 1 to indicate that the drive supports 16 bit wide data transfers Sync 1 Synchronous Data Transfer Always set to 1 to indicate that the drive supports synchronous data transfers Linked 0 Linked Command Support Not supported Always set to 0 CmdQue 0 Tagged Command Queuing Not supported Always set to 0 Vendor Identification QUANTUM The value in this field is left aligned and set to QUANTUM The remainder of the field is filled with space characters Product Identification SDLT600 For the SDLT 600 tape drive this field is set to Product Revision Level Vendor Specific Clocking SDLT600 left aligned filled with space characters to the end of the field Contains 4 bytes of ASCII data that prov
100. 00 02 REV A01 January 2005 SCSI Bus Conditions SDLT 600 SCSI Interface Guide 2 3 2 Reset Condition The SDLT tape drive responds to bus reset conditions as follows e Within 250 milliseconds and typically under 4 milliseconds after a bus reset the drive responds to SCSI bus selections and returns the appropriate normal responses Tape motion commands are returned with Check Condition status Sense Key of Not Ready until the drive makes the medium ready e The drive rewinds the tape medium to Beginning of Partition BOP which is Beginning of Tape BOT NOTE The SDLT tape drive does not implement the hard reset alternative for bus RESET processing The SDLT tape drive recognizes multiple bus resets in succession as well as bus resets of arbitrarily long duration power on conditions It recovers within the time limits specified above following the last bus reset 2 4 January 2005 81 81200 02 REV A01 m SCSI Messages Orn CHAPTER 3 Q This chapter provides a detailed description of the SCSI messages SDLT tape drives support Specifically it covers the following topics e Message Format lists the specific format of SCSI messages e Supported SCSI Messages contains descriptions of each of the messages supported by the drive 3 1 Message Format A message can be one or more bytes in length One or more messages can be sent during a single MESSAGE phase but a message cannot be split across multip
101. 00h MSB 3 5 Buffer Offset LSB MSB 6 8 Parameter List Length LSB 9 Control Figure 4 135 WRITE BUFFER Command Descriptor Block Data Format 81 81200 02 REV A01 January 2005 4 249 WRITE BUFFER Command 3Bh SDLT 600 SCSI Interface Guide Table 4 146 WRITE BUFFER Command Descriptor Block Field Descriptions Field Name Description Mode The drive supports the following values in this field If any other value is set the drive terminates the command with CHECK CONDITION status Sense Key set to ILLEGAL REQUEST Mode Description 00h Write Combined Header and Data 02h Write Data 04h Download Microcode 05h Download Microcode and Save OAh Write Data to Echo Buffer Buffer ID The modes described for the Mode field only support a Buffer ID of 0 except Echo Buffer mode which ignores the Buffer ID field If the Buffer ID field is a value other than 0 the drive rejects the command The drive also detects and rejects commands that would overrun the buffer Buffer Offset This field contains the offset in bytes from the beginning of the buffer 4 38 1 Write Combined Header and Data Mode 00h The data to be transferred is preceded by a 4 byte header consisting entirely of reserved bytes The drive discards this header it is not stored in the buffer The Buffer Offset field must be set to 0 for this mode 4 38 2 Write Data Mode 02h This mode is similar to Header and Data Mode except tha
102. 1 in which case this field Device ID specifies the SCSI ID of the initiator to be granted the reservation of the drive The drive ignores any attempt to release the reservation made by any other initiator For example if ID7 sends ID2 a third party reservation on behalf of ID6 the target at ID2 gets reserved for the initiator ID6 only ID7 can release the target at ID2 using a third party release ID6 cannot release the reservation even though the reservation was made on its behalf Parameter Specifies the length in bytes of the parameter list that is transferred from the List Length initiator If LongID is set to 1 and Extent is set to 0 the Parameter List Length is 8 and the parameter list has the format shown below The drive preserves the reservation until one of the following occurs e Another valid RESERVE command from the initiator supersedes it e The same initiator releases it A TARGET RESET message from any initiator releases it e A reset condition releases it Bit Byte 6 5 4 3 2 1 0 MSB 0 7 Third Party Device ID LSB Figure 4 123 RESERVE 10 ID Only Parameter List Data Format 81 81200 02 REV A03 January 2005 4 229 RESERVE UNIT Command 16h SDLT 600 SCSI Interface Guide 4 29 RESERVE UNIT Command 16h NOTE This command has been made obsolete in the latest version of SCSI 3 and should not be used with any new implementations The SDLT tape dr
103. 1Bh 00h Synchronous Data Transfer Error ABORTED 24h 3Fh Target Operating Conditions Changed 3Fh OFh Echo Buffer Overwritten 43h 00h Message Error 4 226 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 131 Supported ASC ASCQ Hex for REQUEST SENSE Command Continued Text Name Sense Key ASC ASCQ Description 44h 80h Unexpected Selection Interrupt 44h 82h Command Complete Sequence Failure 44h 83h SCSI Chip Gross Error Illegal Command Status 44h 84h Unexpected Unexplained Residue Count in Transfer Register 44h 87h Disconnect SDP Sequence Failed 45h 00h Select Reselect Failure 47h 00h SCSI Parity Error Check SCSI bus configuration and connections 47h Olh Data Phase CRC Error Detected 47h Olh Data Phase CRC Error Detected 48h 00h IDE Message Error 49h 00h Invalid Message Error 4Ah 00h Command Phase Error 4Bh 00h Data Phase Error 4Eh 00h Overlapped Commands Attempted Queue tag is not unique CDB sent with abort tag message or untagged CDBs are outstanding VOLUME 0Dh 00h 02h End of Medium OVERFLOW 1 Contact a service representative 2 Bad firmware image or code download possible 81 81200 02 REV A01 January 2005 4 227 RESERVE 10 Command 56h SDLT 600 SCSI Interface Guide 4 28 RESERVE 10 Command 56h NOTE This command has been made obsolete in the latest version of SCSI 3 and should not be used with any new implementations
104. 4 SCSI Commands Table 4 69 Device Configuration MODE SENSE Page Field Descriptions Field Name Description PS Parameters Savable Not supported Always set to 0 Page Code Identifies the type of MODE SENSE page being transferred A value of 10h identifies this as the Device Configuration page Page Length Indicates the number of bytes in the page excluding bytes 0 and 1 The length is returned on MODE SENSE and must subsequently be set to the same value when performing MODE SELECT CAF Change Active Format Not supported Active Format Active Partition Write Buffer Full Ratio Read Buffer Empty Ratio Write Delay Time DBR BIS RSmk AVC SOCF RBO Not supported Indicates the current logical partition number in use Always set to 0 The drive only supports partition 0 Indicates how full the buffer should be before the drive restarts writing to the medium The drive sets this field to 0 unused since it uses an automatic adaptive mechanism to adjust its ratio dynamically according to the average data rates over the SCSI bus Indicates how empty the buffer should be before the drive restarts reading from the medium The drive sets this field to 0 unused since it uses an automatic adaptive mechanism to adjust its ratio dynamically according to the average data rates over the SCSI bus Indicates the maximum time in 100 msec increments that the drive waits with a partially fully buffer before forcing t
105. 8 Supported Pages LOG SENSE Page Data Format 4 42 Figure 4 19 Read Write Error LOG SENSE Page Header Format 4 43 Figure 4 20 Log Parameters Format for Read Write Error LOG SENSE Page 4 44 Figure 4 21 Last n Error Events LOG SENSE Page Header Format 4 47 Figure 4 22 Log Parameters Format for Last n Error Events LOG SENSE Page 4 48 Figure 4 23 Sequential Access Device LOG SENSE Page Header Format 4 49 Figure 4 24 Log Parameters Format for Sequential Access Device LOG SENSE Page 4 49 Figure 4 25 Temperature LOG SENSE Page Header Format 4 51 Figure 4 26 Log Parameters Format for Temperature Page 4 51 Figure 4 27 TapeAlert LOG SENSE Page Header Format 4 53 Figure 4 28 TapeAlert LOG SENSE Page Parameters Format 4 54 Figure 4 29 Read Write Compression Ratio LOG SENSE Page Header Format 4 57 Figure 4 30 Log Parameters Format for Read Write Compression Ratio LOG SENSE Page Parameter Codes 00h and ON aa eh 4 57 Figure 4 31 Log Parameters Format for Read Write Compression Ratio LOG SENSE Page Parameter Codes 02h through 09h 4 58 Figure 4 32 Device Wellness LOG SENSE Page Header Format 4 61 Figure 4 33 L
106. AD AT PARTITION 1 BINARY Page 4 178 080Bh Reserved OBFFh APPLICATION VENDOR Contains 8 bytes of ASCII data see Attribute Format on page 4 163 identifying the manufacturer of the application client for example class driver or backup program 81 81200 02 REV A01 January 2005 4 177 READ ATTRIBUTE Command 8Ch SDLT 600 SCSI Interface Guide that most recently sent a WRITE ATTRIBUTE command to the drive while this medium auxiliary memory was accessible APPLICATION NAME The name of the application client APPLICATION VERSION The version of the application client USER MEDIUM TEXT LABEL The user level identifier for the medium DATE amp TIME LAST WRITTEN Contains when the application client last wrote to the medium auxiliary memory The format is YY Y YMMDDHHMM that is four numeric ASCII characters for the year followed by two numeric ASCII characters for the month followed by two numeric ASCII characters for the day followed by two numeric ASCII characters between 00 and 24 for the hour followed by two numeric ASCII characters for the minute with no intervening spaces TEXT LOCALIZATION IDENTIFIER Defines the character set see Table 4 105 used for attributes with a TEXT format At this time Super DLTtape only supports the ASCII character set Table 4 105 TEXT LOCALIZATION IDENTIFIER Attribute Values Value Meaning 00h No code specified ASCIT 01h FFh Reserved BARCODE The contents of a barcode
107. CEIVE DIAGNOSTIC RESULTS Command Data Field Descriptions 4 194 Table 4 114 RELEASE 10 Command Field Descriptions 4 197 Table 4 115 RELEASE UNIT Command Field Descriptions 4 198 xiv January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide List of Tables Table 4 116 REPORT DENSITY SUPPORT Command Field Descriptions 4 199 Table 4 117 REPORT DENSITY SUPPORT Header Field Descriptions 4 200 Table 4 118 REPORT DENSITY SUPPORT Data Block Descriptor Field Descriptions ivo edo eye eh RU ete ce ee ea Rte eese ete eco Cae 4 202 Table 4 119 REPORT DEVICE IDENTIFIER Command Descriptor Block Field Descriptions 4 204 Table 4 120 REPORT DEVICE IDENTIFIER Parameter Data Field Descriptions 4 205 Table 4 121 REPORT LUNS Command Descriptor Block Field Descriptions 4 206 Table 4 122 REPORT SUPPORTED OPERATION CODES Command Descriptor Block Field Descriptions u zu Deu s cate awa ER REESE ed aee PER RN RS Caton dados 4 209 Table 4 123 All commands Parameter Data Field Descriptions 4 210 Table 4 124 All commands Command Descriptor Field Descriptions 4 211 Table 4 125 One command Parameter Data Field Descriptions 4 213 Table 4 126 REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS Command Descriptor Block Field Descriptions ei
108. Code Qualifier fields are set to EOM P DETECTED The drive physically positions the tape at EOM P 4 244 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 37 WRITE ATTRIBUTE Command 8Dh The WRITE ATTRIBUTE command allows an application client to write attributes to Enhanced Medium Auxiliary Memory EMAM The WRITE ATTRIBUTE command is the functional counterpart of the READ ATTRIBUTE command Application clients issue READ ATTRIBUTE commands before using this command to discover SDLT tape drive support for EMAM features ioe S 5 4 3 1 0 0 Operation Code 8Dh 1 Reserved 2 4 Restricted 5 Volume Number 6 Reserved 7 Partition Number 8 9 Reserved MSB 10 13 Parameter List Length LSB 14 Reserved 15 Control Figure 4 133 WRITE ATTRIBUTE Command Descriptor Block Data Format 81 81200 02 REV A01 January 2005 4 245 WRITE ATTRIBUTE Command 8Dh SDLT 600 SCSI Interface Guide Table 4 144 WRITE ATTRIBUTE Command Parameter Data Field Descriptions Field Name Description Volume Specifies a volume within the medium auxiliary memory Must be set to 0 Number Super DLTtape media comprises a single volume Partition Specifies a partition within a volume Must be set to 0 Super DLTtape media Number comprises a single partition Parameter Specifies the length in bytes of the parameter
109. Command Descriptor Block Field Descriptions Field Description Service A service action of ODh identifies this as the REPORT SUPPORTED TASK Action MANAGEMENT FUNCTIONS command Allocation Specifies the number of bytes allocated for the returned parameter data The Allocation Length Length value is at least 4 bytes If the allocation length is less than 4 the command shall be terminated with a CHECK CONDITION status the Sense Key shall be set to ILLEGAL REQUEST and the Additional Sense Code shall be set to INVALID FIELD IN CDB this is not considered an error The format of the parameter data is shown in Figure 4 119 The REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS command may return any of the values shown in Figure 4 119 Bit Byte 7 6 5 4 3 2 1 0 0 ATS ATSS CACAS CTSS LURS OTS TRS WAKES MSB 1 3 Reserved LSB Figure 4 119 TASK MANAGEMENT FUNCTIONS Command Parameter Data Data Format Table 4 127 TASK MANAGEMENT FUNCTIONS Command Parameter Data Field Descriptions Field Description ATS Abort Task Supported Not supported Always set to 0 ATSS Abort Task Set Supported Always set to 1 CACAS Clear ACA Supported Not supported Always set to 0 CTSS Clear Task Set Supported Not supported Always set to 0 LURS Logical Unit Reset Supported Always set to 1 QTS Query Task Supported Not supported Always set to 0 TRS Target Reset Supported Always set to 1
110. Current Amount of Data Read LSB 4 168 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Bit Byte 7 4 3 2 1 0 MSB 18 23 Current Read Retries Count LSB MSB 24 29 Previous Amount of Data Written LSB MSB 30 35 Previous Write Retries Count LSB MSB 36 41 Previous Amount of Data Read LSB MSB 42 47 Previous Read Retries Count LSB MSB 48 53 Total Amount of Data Written LSB MSB 54 59 Total Write Retries Count LSB MSB 60 65 Total Amount of Data Read LSB MSB 66 71 Total Read Retries Count LSB MSB 72 77 Load Count LSB 81 81200 02 REV A01 January 2005 4 169 READ ATTRIBUTE Command 8Ch SDLT 600 SCSI Interface Guide Bit Byte 7 6 5 4 3 2 1 0 MSB 78 83 Total Change Partition Count LSB MSB 84 89 Total Partition Initialize Count LSB Figure 4 91 MEDIUM USAGE HISTORY Attribute Data Format Table 4 100 MEDIUM USAGE HISTORY Attribute Parameter Data Field Descriptions Field Name Description Current Indicates the amount of data physically written to the medium during this load of Amount of the medium This value is expressed in increments of 1 048 576 bytes that is a Data value of 1 means 1 048 576 bytes 2 means 2 097 152 bytes and so on Written
111. DEVICE IDENTIFIER Command A3h 4 204 REPORT LUNS Command AOh 4 206 REPORT SUPPORTED OPERATION CODES Command A3h 4 208 All commands Parameter Data Format 4 210 viii January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Table of Contents One command Parameter Data Format 4 212 REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS Command A3h 4 214 REQUEST SENSE Command 03h 4 216 RESERVE 10 Command 56h 4 228 RESERVE UNIT Command 16h AA teen teen teen nen eae 4 230 REWIND Command O1h 2 0 a a a e a a a ta ene eens 4 232 SEND DIAGNOSTIC Command IDh 4 233 Level 1 Test Electronics Test 4 234 Level 2 Test Write Read Functionality Test 4 234 SET DEVICE IDENTIFIER Command A4h 4 237 SPACE Command 11h uua opea netur eh Ua 4 239 TEST UNIT READY Command 00h 4 241 VERIEY Command 13h tpe xem AEA RMH OR BUCH WT wr E mp 4 242 WRITE Command QAB Seem mai AA Wa Wa a an 4 243 WRITE ATTRIBUTE Command 8Dh
112. E Command Data Field Descriptions 4 244 Table 4 144 WRITE ATTRIBUTE Command Parameter Data Field Descriptions 4 246 Table 4 145 WRITE ATTRIBUTE Command Parameter Data Field Descriptions 4 247 Table 4 146 WRITE BUFFER Command Descriptor Block Field Descriptions 4 250 Table 4 147 WRITE FILEMARKS Command Field Descriptions 4 252 81 81200 02 REV A01 January 2005 Xv List of Tables SDLT 600 SCSI Interface Guide xvi January 2005 81 81200 02 REV A01 o List of Figures 1 Introduction 0 0 00 cc cece cece RR 1 1 2 SCSI Parallel Protocol 2 1 3 scsi Messages oss rop uper d asas ES eee qu PS bi Aa 3 1 Figure 3 1 Extended Message Data Format 3 2 Figure 3 2 IDENTIFY Message Data Format 3 6 Figure 3 3 IGNORE WIDE RESIDUE Message Data Format 3 7 Figure 3 4 PARALLEL PROTOCOL REQUEST Message Data Format 3 10 Figure 3 5 SYNCHRONOUS DATA TRANSFER REQUEST Message Data Format 3 12 Figure 3 6 WIDE DATA TRANSFER REQUEST Message Data Format 3 14 4 SCSI Commands s sse 4 1 Figure 4 1 ERASE Command Descriptor Block Data Format 4 10 Figure 4 2 INQUIRY Command Descriptor Block Data Format
113. E Firmware checksums are binary numbers used for positive firmware and EEPROM identification Controller Firmware Build Date An ASCII string in DD MM Y Y YY HH MM SS Firmware Build format Date 81 81200 02 REV A01 January 2005 4 25 INQUIRY Command 12h SDLT 600 SCSI Interface Guide Subsystem Components Revision Page Cth The following information precisely identifies the revision of SDLT tape drive subsystem components Note Page content is subject to change at any time be 7 0 0 Peripheral Qualifier Peripheral Device Type 1 Page Code C1h 2 Reserved 3 Page Length 39h 4 Product Family Released Firmware 5 Firmware Major Version Number 6 Firmware Minor Version Number 7 EEPROM Format Major Version Number 8 EEPROM Format Minor Version Number 9 Firmware Personality 10 Firmware Subpersonality 11 Vendor Specific Subtype 12 Controller Hardware Version Number 13 Tape Drive EEPROM Version Number 14 Tape Drive Hardware Version Number 15 Media Loader Firmware Version Number 16 Media Loader Hardware Version Number 17 Media Loader Mechanical Version Number 18 Media Loader Present Flag 19 Library Present Flag 20 23 Module Revision 24 43 Unit Serial Number Figure 4 11 Subsystem Components Revision Page Data Format January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 15 Subsy
114. E SENSE header A description of the MODE SENSE block descriptor is provided in Table 4 62 Bit Byte 7 6 5 4 3 2 1 0 0 Density Code MSB 1 3 Number of Blocks 000000h LSB 4 Reserved MSB 5 7 Block Length LSB Figure 4 62 MODE SENSE Block Descriptor Data Format 81 81200 02 REV A01 January 2005 4 111 MODE SENSE 6 10 Command 1Ah 5Ah SDLT 600 SCSI Interface Guide Table 4 62 MODE SENSE Block Descriptor Field Descriptions Field Name Description Density Matches the current tape medium density Code Density Code Description 00h Default density 48h 133 000 bpi 56 logical tracks serial cartridge tape 110 0 GB 220 0 GB Super DLTtape I 49h 190 000 bpi 56 logical tracks serial cartridge tape 160 0 GB 320 0 GB Super DLTtape I 4Ah 233 000 bpi 40 logical tracks serial cartridge tape 300 0 GB 600 0 GB Super DLTtape II 50h 175 000 bpi 60 logical tracks serial cartridge tape 80 0 GB 160 0 GB VStape I Number Set to 0 indicating that all of the remaining logical blocks on the tape have the of medium characteristics specified by the block descriptor Blocks Block Specifies the length in bytes of each logical block transferred over the SCSI bus A Length block length of 0 indicates that the length is variable as specified in the I O command Any other value indicates the number of bytes per block that are used for READ WRITE and VE
115. ESERVE OUT parameter list specify List Length the Reservation Keys and extent information required to perform a persistent reservation The parameter list is 24 bytes in length thus the Parameter List Length field is always set to 24 18h 81 81200 02 REV A01 January 2005 4 143 PERSISTENT RESERVE OUT Command 5Fh SDLT 600 SCSI Interface Guide The following table provides detailed descriptions of each of the PERSISTENT RESERVE OUT command s seven possible service actions Service Action codes appear in bits 0 to 4 of Byte 1 Table 4 83 PERSISTENT RESERVE OUT Command s Service Action Descriptions Code Name Description 00h Register When the command executes a Register service action it registers a Reservation Key with the drive without generating a reservation The drive holds these Reservation Keys from each initiator that performs a PERSISTENT RESERVE OUT command with a Register service action until a new PERSISTENT RESERVE OUT command with Register service action from the same initiator changes the key or until the initiator registration is removed by any of the following e Powering down the drive if the last Activate Persist Through Power Loss APTPL see Figure 4 81 on page 4 149 and Table 4 85 on page 4 150 the drive received was 0 e Performing a Clear service action Performing a Pre empt service action Performing a Pre empt amp Clear service action e Performing a Register service action from th
116. F SPACE Ifthe medium auxiliary memory is not accessible because no medium is present no attributes are changed and the WRITE ATTRIBUTE command terminates with a CHECK CONDITION status The Sense Key is set to NOT READY and the Additional Sense Code is set to MEDIUM NOT PRESENT Ifthe medium is present but the medium auxiliary memory is not accessible no attributes are changed and the WRITE ATTRIBUTE command terminates with a CHECK CONDITION status The Sense Key is set to NOT READY and the Additional Sense Code is set to LOGICAL UNIT NOT READY MAM NOT AVAILABLE Ifthe combination of volume number and partition number is not valid the command terminates with a CHECK CONDITION status The Sense Key is set to ILLEGAL REQUEST and the Additional Sense Code is set to INVALID FIELD IN CDB Ifthe medium auxiliary memory has failed as a result of for example a bad checksum the WRITE ATTRIBUTE command terminates with a CHECK CONDITION status The Sense Key is set to MEDIUM ERROR and the Additional Sense Code is set to AUXILIARY MEMORY WRITE ERROR Ifthe WRITE ATTRIBUTE command parameter data contains an attribute with an Attribute Length field see Attribute Format on page 4 163 set to 0 one of the following actions occurs e Ifthe attribute is Read Only no attributes are changed and the WRITE ATTRIBUTE command terminates with a CHECK CONDITION status The Sense Key is set to ILLEGAL REQUEST and the Additional Sense Code is set to INVALID
117. FIELD IN PARAMETER LIST 81 81200 02 REV A01 January 2005 4 247 WRITE ATTRIBUTE Command 8Dh SDLT 600 SCSI Interface Guide e Ifthe attribute is Read Write the attribute is deleted The attribute is not returned in response to a READ ATTRIBUTE command and not reported by the READ ATTRIBUTE command with the ATTRIBUTE LIST service action e Ifthe attribute does not exist the attribute in the WRITE ATTRIBUTE command parameter list is ignored this is not considered an error If either of the following conditions occurs no attributes are changed the WRITE ATTRIBUTE command terminates with a CHECK CONDITION status the Sense Key is set to ILLEGAL REQUEST and the Additional Sense Code is set to INVALID FIELD IN PARAMETER LIST e The parameter data attempts to change a read only attribute e The parameter data contains an attribute with incorrect contents in the Attribute Length field see Attribute Format on page 4 163 4 248 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 38 WRITE BUFFER Command 3Bh The WRITE BUFFER command works with the READ BUFFER command as a diagnostic function for testing the device data buffer DMA engine SCSI bus interface hardware and network SCSI bus integrity It is also used to download and update microcode firmware Bit Byte 7 6 5 4 3 2 1 0 0 Operation Code 3Bh 1 Reserved Mode 2 Buffer ID
118. IDENTIFIER Command Descriptor Block Data Format 4 204 Figure 4 111 REPORT DEVICE IDENTIFIER Data Format 4 205 Figure 4 112 REPORT LUNS Command Descriptor Block Data Format 4 206 Figure 4 113 LUN Reporting Parameter List Data Format 4 207 Figure 4 114 REPORT SUPPORTED OPERATION CODES Command Descriptor Block Data FOTIA 2 2 ox ted ee Wert pent eee dete aee teen Ope Sore ele ed th ae iR deceret 4 208 Figure 4 115 All commands Parameter Data Data Format 4 210 Figure 4 116 All commands Command Descriptor Data Format 4 211 Figure 4 117 One command Parameter Data Data Format 4 212 Figure 4 118 REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS Command Descriptor Bl ck Data Format RTT rm 4 214 Figure 4 119 TASK MANAGEMENT FUNCTIONS Command Parameter Data Data Format 4 215 Figure 4 120 REQUEST SENSE Command Descriptor Block Data Format 4 216 Figure 4 121 REQUEST SENSE Data Format 4 217 Figure 4 122 RESERVE 10 Command Descriptor Block Data Format 4 228 Figure 4 123 RESERVE 10 ID Only Parameter List Data Format 4 229 XX January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide List of Figures Figure 4 124 REQUEST SENSE Command Descriptor Block
119. LSB Figure 4 69 Medium Partition MODE SENSE Page Data Format Table 4 70 Medium Partition MODE SENSE Page Field Descriptions Field Name Description PS Parameters Savable Not supported Always set to 0 Page Code Identifies the type of MODE SENSE page being transferred A value of 11h identifies this as the Medium Partition page Page Length Indicates the number of bytes in the page excluding bytes 0 and 1 The length is returned on MODE SENSE and must subsequently be set to the same value when performing MODE SELECT Maximum Not supported Always set to 0 Additional Partitions Additional Partitions Defined FDP Specifies the number of additional partitions defined for the tape based on the settings of the SDP and IDP bits The maximum allowed is the value returned in the Maximum Additional Partitions field Always set to 0 The drive supports only one partition Fixed Data Partitions Always set to 0 81 81200 02 REV A01 January 2005 4 125 MODE SENSE 6 10 Command 1Ah 5Ah SDLT 600 SCSI Interface Guide Table 4 70 Medium Partition MODE SENSE Page Field Descriptions Continued Field Name Description SDP Select Data Partitions Always set to 0 IDP Initiator Defined Patrons Always set to 0 PSUM Partition Size Unit of Measure Always set to 0 POFM Partition on Format Not supported Always set to 0 Clear Not supported Always set to 0 ADDP Additional De
120. N 3 9 MESSAGE REJECT O7h 0 cee Rh her 3 9 NO OPERATION 08h 3 9 PARALLEL PROTOCOL REQUEST extended message 04h 3 10 RESTORE POINTERS 03h 3 11 SAVE DATA POINTER 02h 3 11 SYNCHRONOUS DATA TRANSFER REQUEST extended message O1h 3 12 WIDE DATA TRANSFER REQUEST extended message 03h 3 14 4 SCSI Commands wmamanann 4 1 Overview of SCSI Command and Status Processing 4 1 Status and Error Reporting 4 3 DATA Phase Command Components 4 4 Unit Attention Condition 4 7 BehavioratPower ONn 4 7 Data Cache and Tape Write Interaction 4 8 SCSI Command Descriptions sep pestia pira UKAA e eet teens 4 8 ERASE Command 19h ee e ee a a a ne ene nett has 4 10 INQUIRY Command 12h 1 44 24 54 44r e tes e C t e C a ia dog 4 11 Standard Inquiry Data Page 4 13 Vendor Specific Inquiry Data Page 4 17 Vital Product Data Pages isse aet aaa 4 19 Sup
121. NARY Page 4 168 MEDIUM LIFE 0221h TOTAL MBYTES READ IN 8 BINARY Page 4 168 MEDIUM LIFE 0222h TOTAL MBYTES WRITTEN IN 8 BINARY Page 4 168 CURRENT LAST LOAD 0223h TOTAL MBYTES READ IN 8 BINARY Page 4 168 CURRENT LAST LOAD 0224h 033Fh Reserved 0340h MEDIUM USAGE HISTORY 90 BINARY Page 4 168 0341h PARTITION USAGE HISTORY 60 BINARY Page 4 172 0342h 03FFh Reserved REMAINING CAPACITY IN PARTITION AND MAXIMUM CAPACITY IN PARTITION These are native capacities assuming no data compression for the specified medium partition expressed in increments of 1 048 576 bytes that is a value of 1 means 1 048 576 bytes 2 means 2 097 152 bytes and so on TAPE ALERT FLAGS Provides a means of reporting the state of the Tape Alert flags for the previous load of the medium Each Tape Alert flag occupies 1 bit Flag 1 MSB byte 1 Flag 64 LSB byte 8 The bits specify all the Tape Alert flags set during the previous load the bits are sticky for the load 4 166 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands LOAD COUNT Indicates how many times this medium has been fully loaded The drive does not reset this attribute MAM SPACE REMAINING Indicates the space currently free in the medium auxiliary memory The total medium auxiliary memory capacity is reported in the MAM CAPACITY attribute see MAM CAPACITY on page 4 176 You cannot always use all of the free space in a particul
122. NUMBER Attribute Parameter Data Field Descriptions Field Name Description Vendor ID Contains the same value returned in the STANDARD INQUIRY data Product Contains the unit serial number Serial Number TOTAL MBYTES WRITTEN IN MEDIUM LIFE AND TOTAL MBYTES READ IN MEDIUM LIFE Indicates the total number of data bytes transferred to or from the medium surface after any data compression has been applied over the entire medium life These values are cumulative and are never reset These values are expressed in increments of 1 048 576 bytes that is a value of 1 means 1 048 576 bytes 2 means 2 097 152 bytes and so on TOTAL MBYTES WRITTEN IN CURRENT LAST LOAD AND TOTAL MBYTES READ IN CURRENT LAST LOAD Indicates the total number of data bytes transferred to or from the medium surface after any data compression has been applied during the current load if the medium is currently loaded or the last load if the medium is currently unloaded The drive resets these attributes to 0 when the medium is loaded These values are expressed in increments of 1 048 576 bytes that is a value of 1 means 1 048 576 bytes 2 means 2 097 152 bytes and so on MEDIUM USAGE HISTORY Provides statistics see Figure 4 91 for the entire medium If a field is not used it is set to 0 Se 2 6 5 4 3 2 1 0 MSB 0 5 Current Amount of Data Written LSB MSB 6 11 Current Write Retries Count LSB MSB 12 17
123. O SENSE with an Additional Sense Code of 5Dh 00h TapeAlert Event The Additional Sense Code of 5Dh 00h for values 03h 04h and 06h signals that a TapeAlert event occurred Information about the event is stored in the TapeAlert Log page The setting of the MRIE field does not impact logging of events in the TapeAlert Log page Not supported Must be set to 0 Report Count or Test Flag Number Must be set to 0 unless the Test bit 1s set to 1 in which case this field indicates a test condition to be generated as follows Value 0 1 to 64 64 to 1 32 767 Result Do not change the TapeAlert Flag but report an exception condition based on the value in the MRIE field Set the TapeAlert flag indicated in the value and generate an exception condition based on the value in the MRIE field Clear the TapeAlert flag in an equivalent manner to taking corrective action for the flag indicated by the absolute number of the value Set all TapeAlert flags and generate an exception condition based on the value in the MRIE field January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 9 11 Vendor Specific Configuration Page 25h The drive supports a Vendor Specific Configuration Page that is used to set or change the vendor unique configuration features Figure 4 54 shows the page that can be changed using the MODE SELECT command and subsequently queried using the MODE SENSE comma
124. ODE SENSE 1Ah command is shown below An illustration of the CDB for the 10 byte MODE SENSE 5Ah command follows on the next page 0 Operation Code 1 Ah 1 Reserved DBD Reserved 2 PC Page Code 3 SubPage Code 4 Allocation Length 5 Control Figure 4 58 MODE SENSE 6 Command Descriptor Block Data Format NOTE The drive returns a CHECK CONDITION status with Sense Key set to ILLEGAL REQUEST if it receives an unsupported Page Code or a Page field with values not supported or not changeable In such cases the drive does not change any parameters as a result of the command 81 81200 02 REV A01 January 2005 4 107 MODE SENSE 6 10 Command 1Ah 5Ah SDLT 600 SCSI Interface Guide The 10 byte MODE SENSE command is required to request the vendor specific EEPROM parameter page due to the large amount of data that parameter page contains MODE SENSE 10 can be used to retrieve the other pages as well Note that MODE SENSE 10 returns descriptor data in a different format than MODE SENSE 6 Byte 7 0 0 Operation Code 5Ah 1 Reserved LLBAA DBD Reserved 2 PC Page Code 3 SubPage Code 4 6 Reserved MSB 7 8 Allocation Length LSB 9 Control Figure 4 59 MODE SENSE 10 Command Descriptor Block Data Format Table 4 60 MODE SENSE Command Descriptor Block Field Descriptions Field Name Description LLBAA Long LBA Accept
125. ORT LUNS AOh Page 4 206 REPORT SUPPORTED OPERATION CODES A3h SA 0Ch Page 4 208 REPORT SUPPORTED TASK MANAGEMENT A3h SA 0Dh Page 4 214 OPERATIONS REQUEST SENSE 03h Page 4 216 RESERVE 10 56h Page 4 228 RESERVE UNIT 16h Page 4 230 REWIND 01h Page 4 232 SEND DIAGNOSTIC 1Dh Page 4 233 SET DEVICE IDENTIFIER A4h Page 4 237 SPACE 11h Page 4 239 TEST UNIT READY 00h Page 4 241 VERIFY 13h Page 4 242 WRITE 0Ah Page 4 243 WRITE ATTRIBUTE 8Dh Page 4 245 4 2 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 1 SCSI Commands Supported by SDLT Tape Drives Continued Command Operation Code Subsection WRITE BUFFER 3Bh Page 4 249 WRITE FILEMARKS 10h Page 4 252 1 SA Service Action NOTES 1 The SDLT tape drive does not act as an initiator on the SCSI bus Therefore the drive does not 1 generate unsolicited interrupts to the host 2 initiate its own SCSI commands or 3 assert bus RESET 2 The RECEIVE DIAGNOSTIC RESULTS and SEND DIAGNOSTIC commands implement vendor specific pages to test the drive during the manufacturing process Quantum recommends that initiators specify only the non page format variants of these commands PF 0 for all pages except page 40h 4 1 1 Status and Error Reporting SCSI message level errors are communicated by messages that are defined specifically for that purpose for example MESSAGE PARITY ERROR MESSAGE REJECT Message level err
126. Obsolete lh WRITE READS Shared Any application client on any initiator may Exclusive execute commands that perform transfers from the tape medium to the initiator WRITES Exclusive Any command from any initiator other than the initiator that holds the persistent reservation that attempts a transfer to the tape medium results in a reservation conflict 2h Obsolete 3h Exclusive READS Exclusive Any command from any initiator other than Access the initiator holding the persistent reservation that attempts a transfer from the tape medium results in a reservation conflict WRITES Exclusive Any command from any initiator other than the initiator holding the persistent reservation that attempts a transfer to the tape medium results in a reservation conflict 4h Obsolete Sh WRITE READS Shared Any application client on any initiator may Exclusive execute commands that perform transfers from the tape medium Registrants Only fo the initiator WRITES Exclusive Any command from an initiator that has not previously performed a Register service action with the drive that attempts a transfer to the tape medium results in a reservation conflict 6h Exclusive READS Exclusive Any command from an initiator that has not Access previously performed a Register service action with the drive that Registrants Only attempts a transfer from the tape medium results in a reservation conflict WRITES Exclusive Any command from an initiato
127. Page Field Descriptions Field Name Description PS Parameters Savable Not supported Always set to 0 Page Code Identifies the type of MODE SENSE page being transferred A value of O1h identifies this as the Read Write Error Recovery Page Page Length Indicates the number of bytes in the page excluding bytes 0 and 1 The length is returned on MODE SENSE and must subsequently be set to the same value when performing MODE SELECT TB Transfer Block The drive does not support the Transfer Block when not fully recovered function Always set to 0 EER Enable Early Recovery This function is always enabled Always set to 1 PER Parity Error When set to 1 enables reporting of CHECK CONDITION for recovered READ WRITE errors Default is 0 DTE Disable Transfer on Error Not supported Always set to 0 DCR Disable ECC Correction Bit Not supported Always set to 0 READ Retry Reports the maximum number of re reads the drive attempts before Count declaring an unrecoverable error WRITE Retry Reports the maximum number or overwrite retries the drive attempts Count before declaring an unrecoverable error 81 81200 02 REV A01 January 2005 4 115 MODE SENSE 6 10 Command 1Ah 5Ah SDLT 600 SCSI Interface Guide Disconnect Reconnect Page 02h The drive supports the Disconnect Reconnect Page The format for the page is shown in the following figure Bit Byte 7 0
128. Quantum ca Q 9g o 2 Interface Guide Interface Guide Interface Guide SCSI 81 81200 02 A01 SDLT 600 Fibre Channel Interface Guide 81 81200 02 A01 December 2007 Made in USA Quantum Corporation provides this publication as is without warranty of any kind either express or implied including but not limited to the implied warranties of merchantability or fitness for a particular purpose Quantum Corporation may revise this publication from time to time without notice COPYRIGHT STATEMENT Copyright 2007 by Quantum Corporation All rights reserved Your right to copy this document is limited by copyright law Making copies or adaptations without prior written authorization of Quantum Corporation is prohibited by law and constitutes a punishable violation of the law TRADEMARK STATEMENT Quantum DLT DLTtape the Quantum logo and DLTtape logo are all registered trademarks of Quantum Corporation SDLT and Super DLTtape are trademarks of Quantum Corporation Other trademarks may be mentioned herein which belong to other companies mi Table of Contents 1 Introduction wawwwww 1 1 Purpose and Scope oco WARE Mae eI Rem E RA Ee hed Kee Nu Ken Sead ed 1 1 Referenced Documents erp 0 teed Bae EURO Aut TR P A 1 1 Related Documents IIIA ee een ene rare 1 2 Structure of this Manual 1 2 MC OMY STILL INS AA Kili eat Be E WA ace ews
129. Quantum SDLT tape drive This chapter does not fully reiterate the entire ANSI SCSI specification for information of this nature refer to the SCSI specification itself The web sites Attp www scsita org and http www tl0 org are also helpful sources of information 4 1 Overview of SCSI Command and Status Processing The Quantum SDLT tape drive supports the SCSI 3 command set The SDLT tape drive supports the SCSI commands listed in Table 4 1 Table 4 1 SCSI Commands Supported by SDLT Tape Drives Command Operation Code Subsection ERASE 19h Page 4 10 INQUIRY 12h Page 4 11 LOAD UNLOAD 1Bh Page 4 28 LOCATE 2Bh Page 4 30 LOG SELECT 4Ch Page 4 31 LOG SENSE 4Dh Page 4 39 MODE SELECT 6 10 15h 55h Page 4 67 MODE SENSE 6 10 1Ah 5Ah Page 4 107 PERSISTENT RESERVE IN SEh Page 4 135 81 81200 02 REV A01 January 2005 4 1 Overview of SCSI Command and Status Processing SDLT 600 SCSI Interface Guide Table 4 1 SCSI Commands Supported by SDLT Tape Drives Continued Command Operation Code Subsection PERSISTENT RESERVE OUT 5Fh Page 4 142 PREVENT ALLOW MEDIUM REMOVAL 1Eh Page 4 152 READ 08h Page 4 153 READ ATTRIBUTE 8Ch Page 4 156 READ BLOCK LIMITS 05h Page 4 181 READ BUFFER 3Ch Page 4 183 READ POSITION 34h Page 4 189 RECEIVE DIAGNOSTIC RESULTS 1Ch Page 4 194 RELEASE 10 57h Page 4 196 RELEASE UNIT 17h Page 4 198 REPORT DENSITY SUPPORT 44h Page 4 199 REPORT DEVICE IDENTIFIER A3h SA 05h Page 4 204 REP
130. RIFY type commands that specify a fixed bit of 1 Fixed Block Mode 4 112 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 10 3 MODE SENSE Mode Pages The following figure depicts the variable length page descriptor Bue 6 5 4 3 2 1 0 0 PS SPF 0 Page Code 1 Page Length 2 n Mode Parameters Figure 4 63 MODE SENSE Page Data Format Descriptions of the MODE SENSE page descriptor fields are provided in Table 4 63 Detailed descriptions of each of the MODE SENSE pages follow Table 4 63 MODE SENSE Page Field Descriptions Field Name Description PS Parameters Savable Not supported Always set to 0 SPF SubPage Format Always set to 0 Indicates that the drive uses the page 0 page format Page Code Refer to Table 4 64 next for a complete list of supported page codes Page Length Indicates the number of bytes in the page excluding bytes 0 and 1 The length is returned on MODE SENSE and must subsequently be set to the same value when performing MODE SELECT Mode Contains the mode parameters for each mode page The mode parameters are Parameters described in the remaining sections of this chapter Page codes and supported pages are Table 4 64 Supported MODE SENSE Block Pages and Page Codes Page Code Description SENSE SELECT Refer to 00h No Requested Page SENSE Olh Read Write Error Recovery Pa
131. RVE OUT command with a Pre empt amp Clear service action removes all persistent reservations for all initiators that have been registered with the service action Reservation Key specified in the PERSISTENT RESERVE OUT command s parameter list It also establishes a persistent reservation for the pre empting initiator Any commands from the initiators being pre empted are terminated as if the pre empted initiator had performed an ABORT TASK management function If a PERSISTENT RESERVE OUT command is sent that specifies a Pre empt amp Clear service action and no persistent reservation exists for the initiator identified by the service action Reservation Key it is not an error condition If the key is registered however the Clear portion of the action executes normally A UNIT ATTENTION condition is established for the pre empted initiators The Sense Key is set to UNIT ATTENTION the Additional Sense Code is set to RESERVATIONS PREEMPTED Commands that follow and retries of commands that timed out because they were cleared are subject to the persistent reservation restrictions set by the pre empting initiator The persistent reservation the pre empting initiator created is defined by the Scope and Type fields of the PERSISTENT RESERVE OUT command and the corresponding fields of the command s parameter list The Pre empt amp Clear service action clears any CA condition with the initiator that is pre empted The Reservation Keys for the
132. Read Reservations Parameters Data Format 4 138 PERSISTENT RESERVE IN Read Reservations Descriptor Data Format 4 140 PERSISTENT RESERVE OUT Command Descriptor Block Data Format 4 142 PERSISTENT RESERVE OUT Parameter List Data Format 4 149 PREVENT ALLOW MEDIUM REMOVAL Command Descriptor Block Data uro usar utr deg Dane bees e tnr on hie ple ul med hee a gd a Lor pee dude dud 4 152 READ Command Descriptor Block Data Format 4 153 READ ATTRIBUTE Command Descriptor Block Data Format 4 156 READ ATTRIBUTE with ATTRIBUTE VALUES Service Action Parameter List SDS OUI Oye rnt oio desees dinde laser ee Sar belek eared 4 159 READ ATTRIBUTE with ATTRIBUTE LIST Service Action Parameter List Format READ ATTRIBUTE with VOLUME LIST Service Action Parameter List Format 4 81 81200 02 REV A01 January 2005 xix List of Figures SDLT 600 SCSI Interface Guide Figure 4 88 READ ATTRIBUTE with PARTITION LIST Service Action Parameter List Format4 162 Figure 4 89 EMAM Attribute Data Format 4 163 Figure 4 90 DEVICE VENDOR SERIAL NUMBER Attribute Data Format 4 167 Figure 4 91 MEDIUM USAGE HISTORY Attribute Data Format 4 170 Figure 4 92 PARTITION USAGE HISTORY Attribute Data Format 4 173 Figure 4 93 READ BLOCK LIMITS Command Descriptor B
133. Response to DISCONNECT Message 3 5 Table 3 5 IDENTIFY Message Field Descriptions 3 6 Table 3 6 IGNORE WIDE RESIDUE Message Field Definitions 3 7 Table 3 7 Drive s Response to INITIATOR DETECTED ERROR Message 3 8 Table 3 8 Features of the PARALLEL PROTOCOL REQUEST Message 3 11 Table 3 9 Transfer Periods and Transfer Rates 3 13 4 SCSI Commands sssse e 4 1 Table 4 1 SCSI Commands Supported by SDLT Tape Drives 4 1 Table 4 2 Status Codes sod IAA a A a A a Aa A 4 4 Table 4 3 Units for Length Fields 4 4 Table 4 4 DATA Phase Command Contents 4 5 Table 4 5 Fields Common to Many SCSI Commands 4 8 Table 4 6 ERASE Command Descriptor Block Field Descriptions 4 10 Table 4 7 INQUIRY Command Descriptor Block Field Descriptions 4 12 Table 4 8 Standard Inquiry Data Page Field Descriptions 4 14 81 81200 02 REV A01 January 2005 xi List of Tables SDLT 600 SCSI Interface Guide Table 4 9 Vendor Specific Inquiry Data Page Field Descriptions 4 18 Table 4 10 Unit Serial Number Page Field Descriptions
134. Tape Drive PItI WAle otc UE e PIU AMO IMMER pee DD eua num D I Sa 4 165 Table 4 99 DEVICE VENDOR SERIAL NUMBER Attribute Parameter Data Field Descriptions 4 168 Table 4 100 MEDIUM USAGE HISTORY Attribute Parameter Data Field D scriptiotis pet co ure eR DER ENCORE ORE ER OE ME ape S odo gres 4 170 Table 4 101 PARTITION USAGE HISTORY Attribute Parameter Data Field D seriptions ies doe epa eene Seb ao Se ever port ee eset us cera d DR Lug 4 173 Table 4 102 Medium Type Attributes for EMAM Supported by the SDLT Tape Drive Firmware 4 175 Table 4 103 MEDIUM TYPE and MEDIUM TYPE INFORMATION Attributes 4 177 Table 4 104 Host Type Attributes for MAM Supported by the SDLT Tape Drive Firmware 4 177 Table 4 105 TEXT LOCALIZATION IDENTIFIER Attribute Values 4 178 Table 4 106 READ BLOCK LIMITS Data Field Descriptions 4 182 Table 4 107 READ BUFFER Command Descriptor Block Field Descriptions 4 184 Table 4 108 READ BUFFER Header Field Description 4 186 Table 4 109 ECHO BUFFER Descriptor Field Descriptions 4 188 Table 4 110 READ POSITION Command Descriptor Block Field Descriptions 4 189 Table 4 111 READ POSITION Short Form Data Field Descriptions 4 190 Table 4 112 READ POSITION Long Form Data Field Descriptions 4 192 Table 4 113 RE
135. The SDLT tape drive supports this command for legacy applications only The RESERVE and RELEASE commands provide contention resolution in multiple initiator systems The RESERVE command reserves a logical unit number The RESERVE 10 CDB is shown in Figure 4 122 and the data fields are described in Table 4 132 If RESERVE 10 is used RELEASE 10 must also be used e 7 6 5 4 3 2 1 0 0 Operation Code 56h 1 Reserved 3rdPty Reserved LongID Extent 0 2 Reservation Identification 3 Third Party Device ID 4 6 Reserved MSB 7 8 Parameter List Length LSB 9 Control Figure 4 122 RESERVE 10 Command Descriptor Block Data Format 4 228 January 2005 81 81200 02 REV A03 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 132 RESERVE 10 Command Field Descriptions Field Description 3rdPty When set to 1 indicates that the Third Party Device ID field is valid LongID When set to 0 indicates that the third party device associated with the reservation release has a number smaller than 255 and the ID value can be sent within the CDB When set to 1 indicates that the third party device ID is greater than 255 the ID value within the CDB is ignored and the parameter list length is at least 8 bytes Extent Not supported Must be set to 0 Reservation Ignored Identification Third Party Required and used only when the 3rdPty bit is set to
136. UT command matches the Reservation Key that is registered for the initiator from which the command is received If there is no match the drive returns a RESERVATION CONFLICT status The Reservation Key of the initiator is valid for all service action and scope values Service Contains information needed for three different service actions Register Pre Action empt and Pre empt amp Clear The Service Action Reservation Key is ignored Reservation for all other service actions Key For the Register service action the Service Action Reservation Key field contains the new Reservation Key to be registered For the Pre empt and the Pre empt amp Clear service actions the Service Action Reservation Key contains the reservation key of the pre empted persistent reservations For the Pre empt and the Pre empt amp Clear service actions any failure of the Service Action Reservation Key to match any registered keys results in the drive returning a RESERVATION CONFLICT status Scope Ignored Specific Address Spec_I PT Specify Initiator Ports Not supported Must be set to 0 All TG PT All Target Ports Not supported Must be set to 0 APTPL Activate Persist Through Power Loss Valid only for Register and Register and Ignore Existing Key service actions It is ignored for all other types of service actions If the last valid APTPL bit value the drive received is 0 loss of power in the drive releases any persistent reservations and removes a
137. UTE with ATTRIBUTE LIST Service Action Parameter List Format Table 4 92 READ ATTRIBUTE with ATTRIBUTE LIST Service Action Parameter Data Field Descriptions Field Name Description Available Contains the number of bytes of attribute information in the parameter list If the Data parameter list is truncated as a result of insufficient allocation length the contents of the Available Data field are not altered Attribute Contains a 2 byte attribute ID The attribute IDs are listed in Table 4 98 on Identifier page 4 165 Table 4 102 on page 4 175 and Table 4 104 on page 4 177 4 160 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands VOLUME LIST Service Action The READ ATTRIBUTE command with the VOLUME LIST service action returns parameter data see Figure 4 87 identifying the supported number of volumes The contents of the Volume Number Partition Number and First Attribute Identifier fields in the CDB are ignored peril ee 6 5 4 3 2 1 0 MSB 0 1 Available Data 02h LSB 2 First Volume Number 3 Number of Volumes Available Figure 4 87 READ ATTRIBUTE with VOLUME LIST Service Action Parameter List Format Table 4 93 READ ATTRIBUTE with VOLUME LIST Service Action Parameter Data Field Descriptions Field Name Description Available Preset to 02h Data First Indicates the first volume available Volume numberi
138. V C D Reserved BPV Bit Pointer MSB 16 17 Field Pointer LSB 18 Internal Status Code VS 19 20 Tape Motion Hours 21 24 Power On Hours 25 28 Tape Remaining 29 Reserved Figure 4 121 REQUEST SENSE Data Format 81 81200 02 REV A01 January 2005 4 217 REQUEST SENSE Command 03h SDLT 600 SCSI Interface Guide Table 4 129 REQUEST SENSE Data Field Descriptions Field Name Description Valid When set to 1 indicates that the Information field contains valid SCSI 3 information When set to 0 indicates that the contents of the Information field are not defined by any command standard Response Code A value of 70h indicates a current error the report is associated with the most recently received command A value of 71h indicates a deferred error the report is associated with a previous command and not as a result of the current command No other values are returned in this field Filemark When set to 1 indicates that the current command read a Filemark EOM End of Medium When set to 1 indicates that an End of Medium condition End of Partition or Beginning of Partition exists The warning is also given by setting the Sense Key to NO SENSE and the Additional Sense Code Qualifier to END OF PARTITION or BEGINNING OF PARTITION ILI Incorrect Length Indicator When set to 1 indicates that the requested logical block length did not match the logical block length of the data on the tape medium Only
139. Vital Product Data Page 00h on page 4 17 An INQUIRY command is neither affected by nor does it clear a Unit Attention condition Bit Byte 7 6 5 4 3 2 1 0 0 Operation Code 12h 1 Reserved Obsolete EVPD 2 Page Code MSB 3 4 Allocation Length LSB 5 Control Figure 4 2 INQUIRY Command Descriptor Block Data Format 81 81200 02 REV A01 January 2005 4 11 INQUIRY Command 12h SDLT 600 SCSI Interface Guide Table 4 7 INQUIRY Command Descriptor Block Field Descriptions Field Description EVPD Enable Vital Product Data If set to 0 the drive returns the Standard Inquiry Data If EVPD is set to 1 the drive returns the Vital Product Data Page specified by Page Code Page Code Specifies the Vital Product Data Page that the drive is to return when EVPD is set to 1 Figure 4 5 on page 4 17 shows the Page Codes for the Vital Product Data pages the drive supports Allocation Specifies the number of bytes of inquiry information the drive is allowed to return Length to the initiator during the command s DATA IN phase The drive does not return Error status if the value in this field truncates the requested information 4 12 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 44 1 Standard Inquiry Data Page Figure 4 3 shows the format of the Standard Inquiry Data page returned by the drive
140. YPE INFORMATION Indicates the type of media on which the MAM chip resides At this time Super DLTtape media only supports the Data Medium type The 4 176 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands MEDIUM TYPE INFORMATION attribute is interpreted according to the type of medium indicated by the MEDIUM TYPE see Table 4 103 Table 4 103 MEDIUM TYPE and MEDIUM TYPE INFORMATION Attributes Medium Type Description Medium Type Information 00h Data medium Reserved 01h 7Fh Reserved Reserved 80h Write once medium Reserved 81h FFh Reserved Reserved Standard Host Type Attributes Application clients use the WRITE ATTRIBUTE and READ ATTRIBUTE commands to maintain the attributes listed in Table 4 104 All host type attributes have a status of read write Table 4 104 Host Type Attributes for MAM Supported by the SDLT Tape Drive Firmware Attribute Attribute Identifier Name Length Format Details 0800h APPLICATION VENDOR 8 ASCII Page 4 177 0801h APPLICATION NAME 32 ASCII Page 4 178 0802h APPLICATION VERSION 8 ASCII Page 4 178 0803h USER MEDIUM TEXT LABEL 160 TEXT Page 4 178 0804h DATE amp TIME LAST WRITTEN 12 ASCII Page 4 178 0805h TEXT LOCALIZATION 1 BINARY Page 4 178 IDENTIFIER 0806h BARCODE 32 ASCII Page 4 178 0807h OWNING HOST TEXTUAL 80 TEXT Page 4 178 NAME 0808h MEDIA POOL 160 TEXT Page 4 178 0809h PARTITION USER TEXT LABEL 16 ASCII Page 4 178 080Ah LOAD UNLO
141. actual length of the parameter data is available in the Additional Length field in the parameter data If the remainder of the parameter data is required the application client must send a new REPORT SUPPORTED OPERATION CODES command with an Allocation Length field value large enough to hold all of the data 81 81200 02 REV A01 January 2005 4 209 REPORT SUPPORTED OPERATION CODES Command A3h SDLT 600 SCSI Interface Guide 4 25 1 All commands Parameter Data Format The REPORT SUPPORTED OPERATION CODES all commands parameter data format begins with a 4 byte header that contains the length in bytes of the parameter data followed by a list of the returned commands Each command descriptor contains information about a single supported command including operation code and service action if applicable The list of command descriptors contains all commands the drive supports Bit Byte 7 6 5 4 3 2 1 0 MSB 0 3 Command Data Length n 3 LSB Commands Command Descriptor 0 4 n Command Descriptor n Figure 4 115 All commands Parameter Data Data Format Table 4 123 All commands Parameter Data Field Descriptions Field Description Command Data Length Command Descriptors The number of bytes in the returned command descriptor list Each command descriptor contains information about a single supported command including operation code and service action if app
142. ameter Pointer contains 2 the drive returns only parameters 3 and 6 to the host If the Parameter Pointer is larger than the highest numbered parameter on the page the drive terminates the command with CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN CDB Note that the drive always returns parameters within a page in ascending order according to the parameter code If the drive does not support a parameter code within a page it does not return any data associated with that parameter Allocation Specifies the maximum number of bytes that the host allocated for returning Length data The host uses this field to limit the size of data transfers to its own internal buffer size 48 1 Error Summary in LOG SENSE Command Descriptor Block The following conditions constitute errors the drive detects relating to the LOG SENSE CDB The drive terminates the command with CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN CDB Error conditions occur when e The drive does not support the requested page e The parameter pointer is larger than the highest numbered parameter on the page e The SP bit is set to 1 81 81200 02 REV A01 January 2005 4 41 LOG SENSE Command 4Dh SDLT 600 SCSI Interface Guide 4 8 2 Supported Pages Log Page Page 00h
143. and Maximum TECH Ti The length of the list of EEPROM parameters requires a 10 byte MODE SENSE command If you use a 6 byte MODE SENSE command to retrieve the EEPROM parameters you will receive the following response Send a 10 byte MODE SENSE command to get the Parameter List 4 134 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 11 PERSISTENT RESERVE IN Command 5Eh The PERSISTENT RESERVE IN command is a 10 byte command used to obtain information about persistent reservations and registrations active in an SDLT tape drive This command works with the PERSISTENT RESERVE OUT command Bit Byte y 6 5 4 3 2 1 0 0 Operation Code SEh 1 Reserved Service Action 2 6 Reserved MSB 7 8 Allocation Length LSB 9 Control Figure 4 76 PERSISTENT RESERVE IN Command Descriptor Block Data Format 81 81200 02 REV A01 January 2005 4 135 PERSISTENT RESERVE IN Command 5Eh SDLT 600 SCSI Interface Guide Table 4 77 PERSISTENT RESERVE IN Command Field Descriptions Field Name Description Service Action Allocation Length The following service action codes are available All other values are reserved Code Name Description 00h Read Keys Reads all registered reservation keys Olh Read Reads all current persistent reservations Reservations 02h Report Returns
144. and remains in effect until one of the following conditions is met e Another valid RESERVE UNIT command from the initiator supersedes it e A RELEASE UNIT command from the same initiator releases it A TARGET RESET message from any initiator releases it e lt A reset condition releases it The occurrence of the last two conditions is indicated by the drive returning a CHECK CONDITION status Sense Key set to UNIT ATTENTION on the next command following the condition It is not an error to issue a RESERVE UNIT command to a drive that is currently reserved by the requesting initiator If another initiator has previously reserved the drive the drive returns a RESERVATION CONFLICT status If after honoring the reservation any other initiator attempts to perform any command except INQUIRY REQUEST SENSE or RELEASE UNIT the drive rejects the command with a RESERVATION CONFLICT status That drive ignores a RELEASE UNIT command issued by another initiator An initiator that holds a current reservation may modify that reservation for example to switch third parties by issuing another RESERVE UNIT command to the drive 81 81200 02 REV A01 January 2005 4 231 REWIND Command 01h SDLT 600 SCSI Interface Guide 4 30 REWIND Command 01h The REWIND command directs the SDLT tape drive to position the tape at the beginning of the currently active partition always Beginning of Media BOM Before rewinding the drive writes any da
145. ar medium auxiliary memory implementation Depending on the internal organization of the memory and the software that controls it fragmentation issues may mean that certain attribute sizes might not be fully accommodated as the medium auxiliary memory nears its maximum capacity FORMATTED DENSITY CODE If the drive formats the medium using a format other than the one specified in the MEDIUM DENSITY CODE attribute for example for compatibility with a previous generation format the FORMATTED DENSITY CODE specifies the DENSITY CODE of the format chosen Otherwise this attribute is the same as the MEDIUM DENSITY CODE INITALIZATION COUNT Indicates the number of times that a drive has logically formatted the medium This figure is cumulative over the life of the medium and is never reset DEVICE VENDOR SERIAL NUMBER AT LAST LOAD DEVICE VENDOR SERIAL NUMBER AT LOAD 1 DEVICE VENDOR SERIAL NUMBER AT LOAD 2 AND DEVICE VENDOR SERIAL NUMBER AT LOAD 3 Provides a rolling history of the last four drives in which the medium has been loaded The format of the attributes is shown in Figure 4 90 Bit Byte 7 6 5 4 3 2 1 0 MSB 0 7 Vendor Identification ID LSB MSB 8 39 Product Serial Number LSB Figure 4 90 DEVICE VENDOR SERIAL NUMBER Attribute Data Format 81 81200 02 REV A01 January 2005 4 167 READ ATTRIBUTE Command 8Ch SDLT 600 SCSI Interface Guide Table 4 99 DEVICE VENDOR SERIAL
146. associated with the medium in the medium auxiliary memory OWNING HOST TEXTUAL NAME Indicates the host from which the USER MEDIUM TEXT LABEL originates MEDIA POOL Indicates the media pool to which this medium belongs PARTITION USER TEXT LABEL A user level identifier for the partition specified by the Partition Number field in the CDB LOAD UNLOAD AT PARTITION Indicates whether the media can be loaded or unloaded at the partition specified by the Partition Number field in the CDB Support for Host Vendor Unique Attributes SDLT tape drives allocate a fixed size 1 029 bytes for the host to write its host vendor unique EMAM attributes These attributes can be numbered in the range 1400h through 17FFh Since attribute headers are 5 bytes in length if the host wants to write one attribute there are 1 024 bytes of attribute data space available If the host wants to write two attributes one maximum and one minimum the largest the maximum can be is 1 029 total 5 max attribute header 5 min attribute header 1 min attribute data or 1 018 data bytes and the smallest the minimum can be is 1 byte 4 178 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Host vendor unique attributes can be added and deleted A write to a host vendor unique attribute causes the drive to test the size remaining Attribute ID 4 MAM Space Remaining and if the write does not cause an out of me
147. at Table 4 46 MODE SELECT Page Descriptor Field Descriptions Field Name Description PS Parameters Savable For the MODE SELECT 6 10 commands this field is reserved Always set to 0 SPF SubPage Format Always set to 0 Indicates that the drive uses the page 0 page format Page Code Identifies the type of MODE SELECT page being transferred Page Length Indicates number of bytes in the page excluding bytes 0 and 1 Mode Parameters Information in this field depends on the Mode page For details refer to a list of all supported Mode pages in Section 4 9 on page 4 67 81 81200 02 REV A01 January 2005 4 75 4 76 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide 49 2 Read Write Error Recovery Page 01h The Read Write Error Recovery Page controls the drive s response to error conditions that arise during the course of READ and WRITE command processing Eu 7 6 5 4 3 2 1 0 0 PS 0 Rsv d Page Code 01h 1 Page Length 0Ah 2 Reserved TB Rsv d EER 1 PER DTE 0 DCR 0 3 Read Retry Count 4 7 Reserved 8 Write Retry Count 9 11 Reserved Figure 4 45 Read Write Error Recovery MODE SELECT Page Data Format January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 47 Read Write Error Recovery MODE SELECT Page Field Descriptions F
148. ata or status bytes using the RESTORE POINTERS message mechanism The drive s response to and its handling of an INITIATOR DETECTED ERROR message are based on when in the I O process the initiator sends the message Table 3 7 summarizes the drive s response 81 81200 02 REV A01 January 2005 3 7 Supported SCSI Messages SDLT 600 SCSI Interface Guide Table 3 7 Drive s Response to INITIATOR DETECTED ERROR Message Bus Phase Drive Response SELECTION COMMAND DATA STATUS MESSAGE IN The drive discards the INITIATOR DETECTED ERROR message and then enters the BUS FREE phase The drive discards any Command Descriptor Block bytes fetched from the initiator sets the Sense Key to ABORTED COMMAND and sets the Additional Sense Code to INITIATOR DETECTED ERROR MESSAGE RECEIVED The drive then sends the CHECK CONDITION status and the TASK COMPLETE message and then enters the BUS FREE phase The drive discards the INITIATOR DETECTED ERROR message sets the Sense Key to ABORTED COMMAND and sets the Additional Sense Code to INITIATOR DETECTED ERROR MESSAGE RECEIVED The drive then sends the CHECK CONDITION status and the TASK COMPLETE message and then enters the BUS FREE phase The drive sends a RESTORE POINTERS message returns to the STATUS phase resends the STATUS command and continues the I O process The drive discards the INITIATOR DETECTED ERROR message sets the Sense Key to ABORTED COMMAND and sets the
149. ata Compression MODE SENSE Page Field Descriptions Field Name Description PS Parameters Savable Not supported Always set to 0 Page Code Identifies the type of MODE SENSE page being transferred A value of OFh identifies this as the Data Compression page Page Length Indicates the number of bytes in the Control Mode Page being transferred The value for this byte is OEh DCE Data Compression Enable The value the drive returns depends on the current WRITE density of the drive When set to 0 indicates that write compression is disabled When set to 1 indicates that write compression is enabled DCC Data Compression Capable The value the drive returns indicates whether the drive supports data compression When set to 0 indicates that data compression is disabled When set to 1 indicates that data compression is enabled 4 120 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 68 Data Compression MODE SENSE Page Field Descriptions Continued Field Name Description DDE Data Decompression Enable The value the drive returns indicates whether data decompression is enabled or not Always set to 1 When the drive reads compressed data from tape it automatically decompresses the data before sending it to the host RED Report Exception on Decompression The drive does not report exceptions on decompression boundaries between compressed and decom
150. ause Nonreportable 04h Olh Unit Not Ready Calibration in Process 04h 02h Unit Not Ready LOAD Command Needed A tape cartridge is loaded but the tape medium is in an unloaded state 04h 03h Unit Not Ready Manual Intervention Needed No tape cartridge is present or a mechanical failure has occurred 04h 07h Unit Not Ready Loader Operation in Progress 25h 90h Bad Code Update Image Header 30h 00h Incompatible Medium Installed 30h 02h Incompatible Format 30h 03h Cleaning Cartridge Installed 3Ah 00h Medium Not Present 3Eh 00h Logical Unit Has Not Self Configured Yet 52h 00h Cartridge Error Calibration Failure 53h 00h Media Load or Eject Failed 5Ah Olh Operator Media Removal Request MEDIUM 03h 00h 00h Medium Error ERROR 00h 17h Cleaning Required OCh 00h WRITE Error 11h 00h Unrecovered READ Error 11h 03h Incomplete Block READ 11h 08h Incomplete Block READ Partial Record Found 14h 00h Recorded Entity Not Found Logical DLT block not found 15h 02h Position Error Detected by Read of Medium 3Bh 00h Sequential Positioning Error 3Bh 08h Repositioning Error 4 222 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 131 Supported ASC ASCQ Hex for REQUEST SENSE Command Continued Text Name Sense Key ASC ASCQ Description 51h 00h ERASE Failure 52h 00h Cartridge Error Calibration Failed 81h 00h Directory Write Error 83h 90h DLTWorm Error Erase Failed 83h 91h DLTWorm Error
151. before each command completes once the End of Medium early warning point is reached effectively operating as if in unbuffered mode When set to 0 the drive continues to operate in buffered mode if enabled past the End of Medium early warning point Default value is 1 SWP Software Write Protection Not supported Always set to 0 Buffer Size at Early Warning Select Data Compression Algorithm Rewind on Reset AsocWP PersWP PrmWP Not supported Always set to 0 If set to 1 data compression is enabled If set to 0 data compression is disabled Always set to 01b indicating that the drive rewinds the tape medium on a logical unit reset operation Associated Write Protection Not supported Always set to 0 Persistent Write Protection Not supported Always set to 0 Permanent Write Protection Not supported Always set to 0 4 124 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Medium Partition Page 11h The drive supports the Medium Partition Page The format for the page is shown below Se 7 6 5 4 3 2 1 0 0 PS 0 Rsv d Page Code 11h 1 Page Length 06h 2 Mazimum Additional Partitions 0 3 Additional Partitions Defined 0 4 FDP 0 SDP 0 IDP 0 PSUM 0 POFM Clear ADDP 5 Medium Format Recognition 01 6 Reserved Partition Units 7 Reserved MSB 8 9 Partition Size
152. bytes of the message that precipitated the MESSAGE PARITY ERROR message 3 2 10 MESSAGE REJECT 07h The initiator or SDLT tape drive sends this message to indicate that the last message received was illegal or has not been implemented To indicate its intention to send this message the initiator asserts the ATN signal before it releases ACK for the REQ ACK handshake of the message that is to be rejected The drive issues the MESSAGE REJECT message in response to any message it considers to be illegal or not supported The drive sends this message to the initiator before requesting any additional message bytes 3 2 11 NO OPERATION 08h If the SDLT tape drive requests a message the initiator sends a NO OPERATION message if it does not currently have any other valid message to send The drive ignores the NO OPERATION message 81 81200 02 REV A01 January 2005 3 9 Supported SCSI Messages SDLT 600 SCSI Interface Guide 3 2 12 PARALLEL PROTOCOL REQUEST extended message 04h PARALLEL PROTOCOL REQUEST PPR messages as shown in Table 3 4 are used to negotiate synchronous transfer agreements and wide data transfer agreements and to set the protocol options between two SCSI devices mu 7 6 5 4 3 2 1 0 0 Extended Message Identifier 01h see Figure 3 1 1 Extended Message Length 06h D Parallel Protocol Request 04h 3 Transfer Period Factor 4 Reserved 5 REQ ACK Offset 6 Transfe
153. can be compressed internally inside the drive before being sent to the host If you choose to do this the process of generating the diagnostic information takes longer but the time to retrieve the information is reduced Using the compression feature is a good choice if you are retrieving the diagnostic information through a slower interface such as the ADT standard transport layer The compression of the diagnostic read buffer is enabled by setting bit 7 of byte 9 the Control byte in the mode 3 read buffer A sample CDB to do this is as follows 3C 03 A2 00 00 00 00 00 04 80 4 17 2 Combined Header and Data Mode 00h In this mode the drive returns a 4 byte header followed by data bytes The drive terminates the DATA IN phase when the Allocation Length bytes of header and data have been transferred or when all available data has been transferred to the initiator whichever is less The 4 byte READ BUFFER header is followed by data bytes from the target data buffer The figure below illustrates the format of the header Bit Byte 7 6 5 4 3 2 1 0 0 Reserved MSB 1 3 Available Length LSB Figure 4 96 READ BUFFER Header Data Format Table 4 108 READ BUFFER Header Field Description Field Name Description Available Length Specifies the total number of data bytes available in the target s buffer This number is neither reduced to reflect the allocation length nor to reflect
154. cles media WRITE operations and media replacement 81 81200 02 REV A01 January 2005 4 205 REPORT LUNS Command A0h SDLT 600 SCSI Interface Guide 4 24 REPORT LUNS Command AOh The REPORT LUNS command requests that the SDLT tape drive send the peripheral device logical unit numbers of known logical units to the applications client The command only returns information about the logical units that accept commands eee and 6 5 4 3 1 0 0 Operation Code A0h 1 Reserved 2 Select Report 3 5 Reserved MSB 6 9 Allocation Length LSB 10 Reserved 11 Control Figure 4 112 REPORT LUNS Command Descriptor Block Data Format Table 4 121 REPORT LUNS Command Descriptor Block Field Descriptions Field Description Select Specifies the type of logical unit addresses to be reported All values other than those listed Report are reserved Value Description 00h The logical unit addresses reported are limited to the following addressing methods Logical unit addressing Peripheral device addressing e Flat space addressing Olh The list of logical units only contains well known logical units if any 02h The list of logical units contains all logical units accessible to the initiator through the addressed SCSI target port 4 206 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4
155. ction describes the specific composition of Enhanced Medium Auxiliary Memory EMAM attributes Each EMAM attribute is identified by a 2 byte attribute ID Attribute Format Each EMAM attribute is communicated between the application client and the drive in the format shown in Figure 4 89 and described in Table 4 95 This format is used in the parameter data for the WRITE ATTRIBUTE command see Section 4 37 and the READ ATTRIBUTE command see Section 4 15 The attribute ID format and length are also sometimes referred to as the attribute header The value of the EMAM attribute header implies nothing about the physical representation of an attribute in the medium auxiliary memory Bit Byte 7 6 5 4 3 2 1 0 MSB 0 1 Attribute Identifier LSB Read Reserved Format 2 Only MSB 3 4 Attribute Length n 4 LSB MSB 5 n Attribute Value LSB Figure 4 89 EMAM Attribute Data Format 81 81200 02 REV A01 January 2005 4 163 READ ATTRIBUTE Command 8Ch SDLT 600 SCSI Interface Guide Table 4 95 EMAM Attribute Parameter Data Field Descriptions Field Name Description Attribute Contains a code value identifying the attribute see Attribute Identifier Values Identifier on page 4 165 Read Only Indicates whether the attribute is read only When set to 1 the attribute is read only When set to 0 the attribute is read write Format Specifie
156. d the End of Partition EOP in the current partition When set to 0 indicates that the current logical position is not between early warning and EOP 4 190 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 111 READ POSITION Short Form Data Field Descriptions Continued Field Name Description LOCU BYCU LOLU PERR Partition Number First Logical Object Location Last Logical Object Location Number of Logical Objects in Object Buffer Number of Bytes in Object Buffer Logical Object Count Unknown When set to 1 indicates that the value contained in the Number of Logical Objects in Object Buffer field does not accurately represent the actual number of logical objects in the object buffer When set to 0 indicates that the value contained in the Number of Logical Objects in Object Buffer field is accurate Byte Count Unknown When set to 1 indicates that the value contained in the Number of Bytes in Object Buffer field does not accurately represent the actual number of bytes in the object buffer When set to 0 indicates that the value contained in the Number of Bytes in Object Buffer field is accurate Logical Object Location Unknown When set to 1 indicates that the values contained in the Partition Number First Logical Object Loca tion or Last Logical Object Location fields are not known or accurate reporting is not currently availab
157. d to reflect the truncation Vendor The value in this field is left aligned and set to QUANTUM The remainder Identification of the field is filled with space characters Product For the SDLT 600 drive this field is set to SDLT600 left aligned and filled Identification with space characters to the end of the field Serial Number The serial number given is the serial number of the module or the drive typically beginning with MX indicating the site of manufacture If the drive serial number is valid it is reported otherwise the module serial number is reported The serial number appears on the bar code label The drive returns the serial number in ASCII format 81 81200 02 REV A01 January 2005 INQUIRY Command 12h SDLT 600 SCSI Interface Guide Logical Unit NAA Identifier Figure 4 9 shows the format of the Logical Unit NAA Identifier Bit Byte 6 5 4 3 2 1 0 0 Protocol Identifier Code Set 1 1 PIV 0 Rsv d Association 0 Identifier Type 3h 2 Reserved 3 Identifier Length 08h MSB 4 11 NAA Identifier binary LSB Figure 4 9 Logical Unit NAA Identifier Data Format Table 4 13 Logical Unit NAA Identifier Field Descriptions Field Name Description Protocol Set to 0 Identifier Code Set Indicates the type of data found in the Identifier field Set to 1h indicating binary data PIV Protocol Identifier Valid Set
158. does not attempt a WRITE or READ to or from the tape medium If an error occurs during the Level 1 test the drive reports a CHECK CONDITION status to the host The host must then issue a REQUEST SENSE command to get the information describing the failure When complete the drive reports any errors that occurred in the extended Sense Data bytes The Level 1 test has an execution time of approximately 5 seconds See Table 4 136 on page 4 235 for information on setting the SEND DIAGNOSTIC CDB fields to select a Level 1 test 4 31 2 Level 2 Test Write Read Functionality Test The Level 2 test performs the following actions 1 Writes two tracks of data one in each direction 2 Rewinds the tape 3 Reads the two tracks of data 4 Rewinds the tape The execution time for the Level 2 test is approximately 12 minutes See Table 4 136 on page 4 235 for information on setting the SEND DIAGNOSTIC CDB fields to select a Level 2 test The Level 1 and Level 2 diagnostic tests do not take parameters Specifying parameters causes the drive to return CHECK CONDITION status with Sense Key set to ILLEGAL REQUEST 4 234 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 136 SEND DIAGNOSTIC CDB Fields Selftst DevOfl and UnitOfl Self Test Code Selftst DevOfl UnitOfl Diagnostic Test Run 101 b 0 0 0 Level 1 Test with Drive and Media Health Check drive is on line 0 0 0 1 Illega
159. e Background Function Must be set to 0 EWASC Enable Warning Must be set to 0 4 92 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 55 TapeAlert MODE SELECT Page Field Descriptions Continued Field Name Description DExcpt Disable Information Exception Operations When set to 0 the reporting method specified by the contents of the MRIE field is selected When set to 1 all information exception conditions are disabled regardless of the contents of the MRIE field When in this mode the software polls the TapeAlert Log page To enable CHECK CONDITION mode set DExcpt to 0 Default setting is 1 Test Generates false TapeAlert conditions to test the response to failure conditions See the Report Count Test Flag Number description for more information If both Test and DExcpt are set to 1 the drive returns CHECK CONDITION status Sense Key ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN PARAMETER LIST LogErr Error Log Not supported Must be set to 0 MRIE Method for Reporting Informational Exceptions The drive uses the contents of this field to report information about exception conditions The available methods are Value Method 00h No reporting of Informational Exception Conditions The drive does not report information exception conditions 03h Conditionally Generate Recovered Error The drive reports informational exception c
160. e SDLT tape drive are 8 bits transfer width Exponent 00h and 16 bits transfer width 01h Other transfer widths are reserved Transfer Period 09h 12 5 nsec Transfer Period 80 MHz Factor OAh 25 nsec Transfer Period 40 MHz OCh 50 nsec Transfer Period 20 MHz 19h 100 nsec Transfer Period 10 MHz 32h 200 nsec Transfer Period 5 MHz 3 2 13 RESTORE POINTERS 03h The SDLT tape drive sends the RESTORE POINTERS message to the initiator to direct the initiator to copy the most recently saved command data and status pointers for the I O process to the corresponding current pointers The command and status pointers are restored to the beginning of the present command and status areas The data pointer is restored to the value at the beginning of the data area in the absence of a SAVE DATA POINTER message or to the value at the point at which the last SAVE DATA POINTER message occurred for that logical unit When the drive receives the RESTORE POINTERS message it switches to the message in phase and returns MESSAGE REJECT 3 2 14 SAVE DATA POINTER 02h The SDLT tape drive sends the SAVE DATA POINTER message to direct the initiator to copy the current data pointer to the saved data pointer for the current I O process The drive sends this message before a disconnect during a data transfer It may not send a SAVE DATA POINTER message if it intends to move directly to the STATUS phase If the drive receives this message it
161. e drive Bit Byte 7 0 Page Code 3Eh 1 Reserved MSB 2 3 Page Length LSB Figure 4 34 Device Status LOG SENSE Page Header Format Table 4 39 Device Status LOG SENSE Header Field Descriptions Field Name Description Page Code Echoes the page code specified in the LOG SENSE CDB Page Length Specifies the number of bytes available and depends on the parameters requested Bit Byte 7 6 5 4 3 2 1 0 0 1 Parameter Code 2 DU DS TSD ETC TMC LBIN LP 3 Parameter Length 04h MSB 4 7 Parameter Value LSB Figure 4 35 Log Parameters Format for Device Status LOG SENSE Page 4 64 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 40 Log Parameters for Device Status LOG SENSE Page Field Descriptions Field Name Description Parameter Code DU DS TSD ETC TMC LBIN LP Parameter Length Parameter Value Parameter codes 0000h through 000Ah are supported Code Description 0000h Specifies the device type For sequential type devices such as tape drives the value is always 00010000h 0001h Specifies device cleaning related status see Figure 4 36 0002h Specifies the number of loads over the lifetime of the drive 0003h Specifies the number of cleaning sessions per cartridge 0004h Vendor specific 0005h Drive temperature in degrees C 0006h Media ID of the most recen
162. e drive should return CHECK CONDITION status with Sense Key set to UNIT ATTENTION when one of the READ and WRITE error counters of the log pages reach a specified threshold Modify the thresholds using the LOG SELECT command Queue Algorithm Must be set to 0 Modifier QErr Queue Error Must be set to 0 DQue Disable Queuing Must be set to 0 TAS Task Aborted Status Must be set to 0 indicating that tasks aborted by other initiators do not return a status RAC Report a Check Must be set to 0 indicating that the drive may return BUSY UA Intlck Ctrl SWP Autoload Mode status Unit Attention Interlocks Control Must be set to 0 indicating that the drive clears UNIT ATTENTION conditions when they are reported Software Write Protect Not supported Must be set to 0 Indicates the action the drive is to take when tape medium is loaded All values not listed below are reserved Value Description 000b The medium is loaded for full access 001b The medium is loaded for Enhanced Medium Auxiliary Memory EMAM access only 010b The medium is not loaded 81 81200 02 REV A01 January 2005 4 81 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide Table 4 49 Control Mode MODE SELECT Page Field Descriptions Continued Field Name Description Busy Timeout Period Specifies the maximum time in 100 ms increments that the initiator allows the drive to remain busy for unanticipated conditi
163. e following figures her 6 5 4 3 1 0 0 Mode Sense Data Length 1 Medium Type 2 WP Buffered Mode Speed 0 3 Block Descriptor Length Figure 4 60 MODE SENSE 6 Data Header Data Format 81 81200 02 REV A01 January 2005 4 109 MODE SENSE 6 10 Command 1Ah 5Ah SDLT 600 SCSI Interface Guide Bs 7 6 5 4 3 2 1 0 MSB 0 1 Mode Data Length LSB 2 Medium Type 3 WP Buffered Mode Speed 0 4 5 Reserved MSB 6 7 Block Descriptor Length LSB Figure 4 61 MODE SENSE 10 Data Header Data Format Table 4 61 MODE SENSE Data Header Field Descriptions Field Name Description Mode Data Specifies the length in bytes of the MODE SENSE data that is available to Length be transferred during the DATA IN phase Note that the Mode Data Length does not include its own length Medium Type The drive checks the media type which can be one of the following Type Description 00h Unknown or not present 81h Cleaning tape 86h Super DLTtape 87h Super DLTtape II 90h VStape p WP Write Protect When set to 0 indicates that the tape is write enabled When set to 1 indicates that the tape 1s write protected 4 110 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guid e Chapter 4 SCSI Commands Table 4 61 MODE SENSE Data Header Field Descriptions Continued Field Name
164. e is set to MAM NOT AVAILABLE 4 180 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 16 READ BLOCK LIMITS Command 05h The READ BLOCK LIMITS command directs the SDLT tape drive to report its block length limits eal 6 5 4 3 2 1 0 0 Operation Code 05h 1 4 Reserved 5 Control Figure 4 93 READ BLOCK LIMITS Command Descriptor Block Data Format The READ BLOCK LIMITS data shown below is sent during the DATA IN phase of the command The command does not reflect the currently selected block size only the available limits The MODE SENSE command returns the current block size Bit Byte 7 6 5 4 3 2 1 0 0 Reserved Granularity 0 MSB 1 3 Mazimum Block Length LSB MSB 4 5 Minimum Block Length LSB Figure 4 94 READ BLOCK LIMITS Data Data Format 81 81200 02 REV A01 January 2005 4 181 READ BLOCK LIMITS Command 05h SDLT 600 SCSI Interface Guide Table 4 106 READ BLOCK LIMITS Data Field Descriptions Field Name Description Granularity Maximum Block Length Minimum Block Length Indicates the granularity of block sizes the drive supports Block sizes must be an even multiple of 2 raised to the granularity power This field is set to 0 for all densities indicating any block size between the minimum and the maximum is acceptable Indicates the maximu
165. e same initiator with the value of the service action Reservation Key set to 0 When a Reservation Key has not yet been established or when the Reservation Key has been removed a Reservation Key of 0 is used when the initiator issues a PERSISTENT RESERVE OUT command with the Register service action When the reservation has been removed no information is reported for the initiator in the Read Keys service action of the resulting PERSISTENT RESERVE IN command Olh Reserved A PERSISTENT RESERVE OUT command with Reserve service action creates a persistent reservation with a specified Scope and Type Persistent reservations are not superseded by a new persistent reservation from any initiator except by the execution of a PERSISTENT RESERVE OUT command that specifies a Release Clear Pre empt or Pre empt amp Clear service action 4 144 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 83 PERSISTENT RESERVE OUT Command s Service Action Descriptions Continued Code Name Description 02h 03h Release Clear A PERSISTENT RESERVE OUT command with Release service action removes a persistent reservation held by the same initiator The fields associated with a Release service action match fields of the active persistent reservation Sending a PERSISTENT RESERVE OUT command that specifies a Release service action when no persistent reservation exists from that ini
166. ead from the medium in the partition Amount of specified by the Partition Number field in the CDB since the last medium format Data Read This value is expressed in increments of 1 048 576 bytes that is a value of 1 means 1 048 576 bytes 2 means 2 097 152 bytes and so on Total Read Indicates the number of times the drive performed a Read retry in the partition Retries specified by the Partition Number field in the CDB since the last medium format Count Load Indicates the number of loads in the partition specified by the Partition Number Count field in the CDB since the last medium format This count accumulates over the life of the medium but it is reset to 0 after a medium format 4 174 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 101 PARTITION USAGE HISTORY Attribute Parameter Data Field Descriptions Continued Field Name Description Total Indicates the number of times that switches to the partition specified by the Change Partition Number field in the CDB have been performed on the medium Must be Partition set to 0 Super DLTtape media comprises a single volume Count Total Indicates the number of times that the partition specified by the Partition Number Partition field in the CDB has been initialized This count accumulates over the life of the Initialize medium but it is reset to 0 after a medium format Count Standard Medium Type Attributes Mediu
167. ecovery Control Page Page 4 97 3Eh EEPROM Vendor Specific Page Page 4 98 Except for the EEPROM Vendor Specific Page page 3Eh the drive always powers on with its default configurations set This is also true if the drive receives a TARGET RESET message or a reset on the RST line of the SCSI bus NOTE See Changeable Parameters Within MODE SELECT on page 4 105 for a list of changeable parameters within MODE SELECT See EEPROM Vendor Specific Page 3Eh on page 4 134 for additional information about how to use these changeable parameters 81 81200 02 REV A01 January 2005 4 67 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide WA 7 6 4 3 2 0 0 Operation Code 15h 1 Reserved PF Reserved SP 0 2 3 Reserved 4 Parameter List Length 5 Figure 4 37 MODE SELECT 6 Command Descriptor Block Data Format ri S 6 4 3 2 0 0 Operation Code 55h 1 Reserved PF Reserved SP 0 2 6 Reserved MSB 7 8 Parameter List Length LSB 9 NOTE The drive returns a CHECK CONDITION status with Sense Key set to ILLEGAL REQUEST if it receives an unsupported page code or a page field with values not supported or not changeable In such cases the drive Figure 4 38 MODE SELECT 10 Command Descriptor Block Data Format does not change any parameters as a result of a command 4 68 January 2005 81
168. ed Ignored The drive does not support long LBA format mode parameters DBD Disable Block Descriptors When set to 0 the drive returns the block descriptor data When set to 1 the drive does not return block descriptor information PC Page Control Indicates the type of page parameter values the drive returns to the host PC Type of Parameter Values 00b Report Current Values 01b Report Changeable Values 10b Report Default Values 11b Report Saved Values 4 108 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 60 MODE SENSE Command Descriptor Block Field Descriptions Continued Field Name Description Page Code Allows the host to select a specific page or all of the pages the drive supports SubPage Code Specifies the subpage to return Set to FFh to return all subpages Allocation Length Specifies the number of bytes that the host has allocated for returned MODE SENSE data An Allocation Length of 0 indicates that the drive returns no MODE SENSE data This is not considered an error and the drive returns GOOD status MODE SENSE may be either MODE SENSE 6 or MODE SENSE 10 MODE SENSE 6 data contains a 4 byte header followed by one 8 byte block descriptor followed by zero or more variable length pages depending on the Page Code and Allocation Length 4 10 1 MODE SENSE Data Headers The MODE SENSE 6 and MODE SENSE 10 headers are depicted in th
169. ed Operation Code field specifies an operation code that has service actions the drive returns CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Addition Sense Code set to INVALID FIELD IN CDB See One command Parameter Data Format on page 4 212 for more information 010b The drive returns the command support data in the one_command parameter data format for the operation code and service action specified in the Requested Operation Code and Requested Service Action fields If the Requested Operation Code field specifies an operation code that does not have service actions the drive returns CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Addition Sense Code set to INVALID FIELD IN CDB See One_command Parameter Data Format on page 4 212 for more information Requested Specifies the operation code of the command to be returned in the one command Operation parameter data format See One command Parameter Data Format on page 4 212 for Code more information Requested Specifies the service action of the command to be returned in the one command parameter Service data format See One command Parameter Data Format on page 4 212 for more Action information Allocation Specifies the number of bytes allocated for the returned parameter data If the Allocation Length Length value is not large enough to hold all of the parameter data the drive truncates the data it returns This is not considered an error The
170. ed action The SDLT tape drive responds with a MESSAGE OUT phase as described in the following table Table 2 1 Drive s MESSAGE OUT Phase Response ATN Signal True in Phase The Drive Enters MESSAGE OUT COMMAND DATA STATUS MESSAGE IN SELECTION RESELECTION After transferring part or all ofthe command descriptor block bytes At the drive s earliest convenience often on a logical block boundary The initiator continues REQ ACK handshakes until it detects the phase change After the initiator has acknowledged the status byte Before it sends another message This permits a MESSAGE PARITY ERROR message from the initiator to be associated with the appropriate message Immediately after that SELECTION phase After the drive has sent its IDENTIFY message for that RESELECTION phase 1 Before the initiator releases BSY provided the initiator asserted ATN 2 The initiator should only assert the ATN signal during a RESELECTION phase to transmit a TARGET RESET or DISCONNECT message The initiator keeps the ATN signal asserted if more than one byte is to be transferred The initiator may negate the ATN signal at any time except that it should not negate ATN while the ACK signal is asserted during a MESSAGE OUT phase NOTE Normally the initiator negates the ATN signal while the REQ signal is true and the ACK signal is false during the last REQ ACK handshake of the MESSAGE OUT phase 81 812
171. emainder of the list is required the application client either 1 sends anew READ ATTRIBUTE command with the Allocation Length field set to a large enough value to contain the entire parameter list or 2 uses the First Attribute Identifier field to restrict the attributes returned 4 15 1 Error Summary for the READ ATTRIBUTE Command If the medium auxiliary memory is not accessible because the medium is not present the drive terminates the READ ATTRIBUTE command with a CHECK CONDITION status The Sense Key is set to NOT READY and the Additional Sense Code is set to MEDIUM NOT PRESENT If the medium is present but the medium auxiliary memory is not accessible the drive terminates the READ ATTRIBUTE command with a CHECK CONDITION status The Sense Key is set to NOT READY and the Additional Sense Code is set to LOGICAL UNIT NOT READY MAM NOT AVAILABLE If the combination of volume number and partition number is not valid the drive terminates the READ ATTRIBUTE command with a CHECK CONDITION status The Sense Key is set to ILLEGAL REQUEST and the Additional Sense Code is set to INVALID FIELD IN CDB If the specified attribute identifier does not exist the drive terminates the READ ATTRIBUTE command with a CHECK CONDITION status The Sense Key is set to ILLEGAL REQUEST and the Additional Sense Code is set to INVALID FIELD IN CDB If the medium auxiliary memory has failed the drive terminates the READ ATTRIBUTE command with a CHECK CONDITION
172. en using the WRITE ATTRIBUTES commands All other attributes are reported as read only Standard Device Type Attributes The drive maintains and updates device type attributes see Table 4 98 when the medium and associated medium auxiliary memory are present Table 4 98 Device Type Attributes for EMAM Supported by the SDLT Tape Drive Firmware Attribute Attribute Identifier Name Length Format Details 0000h REMAINING CAPACITY IN 8 BINARY Page 4 166 PARTITION 0001h MAXIMUM CAPACITY IN 8 BINARY Page 4 166 PARTITION 0002h TAPE ALERT FLAGS 8 BINARY Page 4 166 0003h LOAD COUNT 8 BINARY Page 4 167 0004h MAM SPACE REMAINING 8 BINARY Page 4 167 0005h ASSIGNING ORGANIZATION 8 ASCII 0006h FORMATTED DENSITY CODE 1 BINARY Page 4 167 81 81200 02 REV A01 January 2005 4 165 READ ATTRIBUTE Command 8Ch SDLT 600 SCSI Interface Guide Table 4 98 Device Type Attributes for EMAM Supported by the SDLT Tape Drive Firmware Continued Attribute Attribute Identifier Name Length Format Details 0007h INITIALIZATION COUNT 2 BINARY Page 4 167 0008h 020Ah Reserved 020Ah DEVICE VENDOR SERIAL 40 ASCII Page 4 167 NUMBER AT LAST LOAD 020Bh DEVICE VENDOR SERIAL 40 ASCII Page 4 167 NUMBER AT LOAD 1 020Ch DEVICE VENDOR SERIAL 40 ASCII Page 4 167 NUMBER AT LOAD 2 020Dh DEVICE VENDOR SERIAL 40 ASCII Page 4 167 NUMBER AT LOAD 3 020Eh 021Fh Reserved 0220h TOTAL MBYTES WRITTEN IN 8 BI
173. erial number matches what is shown on the exterior of the drive chassis 81 81200 02 REV A01 January 2005 4 27 LOAD UNLOAD Command 1Bh SDLT 600 SCSI Interface Guide 4 5 LOAD UNLOAD Command 1Bh The LOAD UNLOAD command instructs the SDLT tape drive to load or unload the tape inside the data cartridge If no data cartridge is in the drive the LOAD UNLOAD command returns a CHECK CONDITION status with the Sense Key set to NOT READY Likewise if the drive receives a LOAD UNLOAD command with the Immediate bit set and then it receives another command that requires tape motion or if it receives a TEST UNIT READY command the drive returns a CHECK CONDITION status with the Sense Key set to NOT READY Before executing the LOAD UNLOAD command the drive writes any cached write data to the tape hae 7 6 5 4 3 2 1 0 0 Operation Code 1Bh 1 Reserved Immed 2 3 Reserved 4 Reserved Hold EOT ReTen Load 5 Control Figure 4 12 LOAD UNLOAD Command Descriptor Block Data Format Table 4 16 LOAD UNLOAD Command Descriptor Block Field Descriptions Field Name Description Immed Immediate When set to 1 the drive returns status as soon as the operation starts When set to 0 the drive returns status after the operation has completed Hold When set to 1 indicates that Enhanced Medium Auxiliary Memory EMAM is accessible upon completion of the command but the medi
174. erved Prevent 5 Control Figure 4 82 PREVENT ALLOW MEDIUM REMOVAL Command Descriptor Block Data Format Table 4 87 PREVENT ALLOW MEDIUM REMOVAL Command Descriptor Block Field Descriptions Field Name Value Description Prevent 0 Clears the Prevent state corresponding to the initiator When all initiators have cleared their Prevent states the Eject button and UNLOAD commands are enabled both for the drive and for any attached tape automation system library or loader By default after power on a reset condition or a TARGET RESET message the PREVENT MEDIUM REMOVAL function is cleared 1 Effectively disables the Eject button on the drive s front panel The UNLOAD command does not unload the tape medium or the data cartridge Each initiator maintains the PREVENT ALLOW status in the drive separately If the drive is in a tape automation system library or loader any MOVE MEDIUM command is prevented from removing a data cartridge 4 152 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 14 READ Command 08h The READ command transfers one or more data blocks or bytes to the initiator starting with the next block on the tape Bu s 7 6 5 4 3 2 1 0 0 Operation Code 08h 1 Reserved SILI Fixed MSB 2 4 Transfer Length LSB 5 Control Figure 4 83 READ Command Descriptor Block Data Format Tab
175. escription PS Page Code Page Length DCE DCC DDE Compression Algorithm Decompression Algorithm Parameters Savable For MODE SELECT must be set to 0 Identifies the type of MODE SELECT page being transferred A value of OFh identifies this as the Data Compression Page Indicates the number of bytes in the Data Compression Page that follow this field The only valid value for this field is OEh Data Compression Enable Specifies whether the drive enables or disables data compression When set to 1 the drive compresses all data before writing it to tape When set to 0 the drive does not compress data before writing it to tape Data Compression Capable The MODE SENSE command uses this bit to indicate that the drive supports data compression Data Decompression Enable Must be set to 1 When the drive reads compressed data from tape it automatically decompresses the data before sending it to the host Data decompression must always be enabled Report Exception on Decompression The drive does not report exceptions on decompression boundaries between compressed and uncompressed data Must be set to 00h Indicates which compression algorithm the drive uses to process data from the host when the DCE bit byte 02 bit 7 is set to 1 The only value currently supported for this field is 10h Specifying a value other than 10h for this field causes the drive to return CHECK CONDITION status Sense Key set to ILLEGAL
176. etween released and test versions of firmware When set to 1 indicates released code Vxxx when set to 0 indicates field test code Txxx Released code has no minor firmware version number byte 38 is set to 0 For tracking purposes field test and engineering versions of code have non zero minor firmware version numbers These fields display the various version numbers in binary format instead of ASCII Numeric indicator of firmware personality Note that when set to 4 indicates OEM family Indicates the variant of the firmware personality Always set to 1 indicating the primary firmware personality variant Product identification When set to 0 indicates no loader present Non zero indicates loader is present When set to 0 indicates no library present Non zero indicates library is present A 4 byte ASCII string representing the revision level of the tape drive s module the controller PCBA attached to the drive 4 18 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 44 2 Vital Product Data Pages The following subsections describe the Vital Product Data Pages for the SDLT tape drive Supported Vital Product Data Page 00h The Supported Vital Product Data Page provides a directory of the Vital Product Data pages that the drive supports The supported pages are e Supported Vital Product Data Page 00h Unit Serial Number Page 80h e Device Identification
177. f Data the medium This value is expressed in increments of 1 048 576 bytes that is a Written value of 1 means 1 048 576 bytes 2 means 2 097 152 bytes and so on Previous Indicates the total number of times the drive performed a Write retry in the Write partition specified by the Partition Number field in the CDB during the previous Retries load of the medium Count Previous Indicates the amount of data physically read from the medium in the partition Amount of specified by the Partition Number field in the CDB during the previous load of Data Read the medium This value is expressed in increments of 1 048 576 bytes that is a value of 1 means 1 048 576 bytes 2 means 2 097 152 bytes and so on Previous Indicates the number of times the drive performed a Read retry in the partition Read specified by the Partition Number field in the CDB during the previous load of Retries the medium Count Total Indicates the amount of data physically written to the medium in the partition Amount of specified by the Partition Number field in the CDB since the last medium format Data This value is expressed in increments of 1 048 576 bytes that is a value of 1 Written means 1 048 576 bytes 2 means 2 097 152 bytes and so on Total Write Indicates the total number of times the drive performed a Write retry in the Retries partition specified by the Partition Number field in the CDB since the last Count medium format Total Indicates the amount of data physically r
178. fer and Echo Buffer Descriptor modes this field is ignored Buffer Offset Allows the host to specify the location of the start of the data within the buffer This field is reserved and must be set to 0 for all modes except Data and Descriptor modes 4 184 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 107 READ BUFFER Command Descriptor Block Field Descriptions Continued Field Name Description Allocation Specifies the maximum number of bytes the initiator has allocated for returning Length data The host uses this field to limit the size of data transfers to its own internal buffer size Comp Compression When set to 1 enables compression of buffer A2h the live buffer when set to 0 disables compression of buffer A2h Note This parameter applies only to buffer A2h and is ignored for all other buffers 4 17 1 Retrieving Diagnostic Data The host should first send a READ BUFFER command in Descriptor mode Mode 3 to determine the size of the buffer being returned In response to the READ BUFFER command the drive returns 4 bytes of data 3 of which contain the size of the buffer Note that this may take a while to complete possibly as much as 1 minute The host uses this data to establish the Buffer Offset and Allocation Length fields of the CDB Once the host knows the size of the buffer the host sends a Mode 2 READ BUFFER command to transfer the data across
179. ferred parameter code 09h reports the number of bytes less than a full megabyte that have been transferred Multiplying the counter returned for parameter code 08h by 1 048 576 and then adding the value of the counter returned by parameter code 09h results in the actual total bytes written to the drive 4 60 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 8 9 Device Wellness Log Page 33h The Device Wellness Page returns information about any CHECK CONDITION status related to Sense Keys 03h 04h 09h and OBh that the SDLT tape drive has logged This page can contain up to 16 entries parameter code 0000h to 000Fh Note that parameter code 0000h contains the oldest log information while parameter code 000Fh contains the most recent log information This page begins with a 4 byte header followed by the log parameter blocks as shown in Figure 4 32 Bit Byte 7 4 3 0 0 Page Code 33h 1 Reserved MSB 2 3 Page Length LSB Figure 4 32 Device Wellness LOG SENSE Page Header Format Table 4 37 Device Wellness LOG SENSE Header Field Descriptions Field Name Page Code Page Length Echoes the page code specified in the LOG SENSE CDB Specifies the number of bytes available and depends on the parameters 81 81200 02 REV A01 January 2005 4 61 LOG SENSE Command 4Dh SDLT 600 SCSI Interface Gu
180. ferred A value of 18h identifies this as the Logical Unit Control Page Page Length Indicates the number of bytes in the page excluding bytes 0 and 1 The length is returned on MODE SENSE and must subsequently be set to the same value when performing MODE SELECT If the drive receives an unexpected page length value it returns a CHECK CONDITION status Sense Key set to ILLEGAL REQUEST Protocol A value of 1h indicates that this mode page applies to an SPI device For Identifier details see SCSI Primary Commands 3 SPC 3 81 81200 02 REV A01 January 2005 4 89 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide 4 9 9 Port Control Page 19h The Port Control Page contains the parameters that affect SCSI target port operation options b a 2 U 0 PS SPF 0 Page Code 19h 1 Page Length 06h 2 Reserved Protocol Identifier 1h 3 Reserved MSB 4 5 Synchronous Transfer Timeout LSB 6 7 Reserved Figure 4 52 Port Control MODE SELECT Page Data Format Table 4 54 Port Control MODE SELECT Page Field Descriptions Field Name Description PS Parameters Savable Not supported Must be set to 0 SPF SubPage Format Always set to 0 Indicates that the drive uses the page_0 page format Page Code Identifies the type of MODE SELECT page being transferred A value of 19h identifies this as the Port Control Page Page Length Indicates the number of bytes i
181. field specifies the number of blocks to be transferred to the drive beginning at the current tape position This form of WRITE is valid only if the drive is currently operating in fixed block mode as indicated by the Block Size field in the Mode Parameter Block Descriptor see Mode Parameter List on page 4 69 The current block length is the block length defined in the MODE SELECT command Upon termination the drive logically positions the tape after these blocks Transfer Contains the length of the data transfer in bytes or blocks depending on Length whether fixed or variable block mode is selected When set to 0 no data is transferred and the current position on the drive is not changed Exception Conditions If the drive detects End of Tape EOT while writing it finishes writing any buffered data The command terminates with CHECK CONDITION status Within the Sense Data the EOM field is set the Sense Key is set to NO SENSE and the Additional Sense Code and Additional Sense Code Qualifier fields are set to EOM P DETECTED The drive attempts to complete any subsequent writes returning a CHECK CONDITION status in each case If the drive encounters the physical EOM when attempting a WRITE it returns a CHECK CONDITION status Within the Sense Data the EOM and Valid fields are set and the Sense Key field is set to VOLUME OVERFLOW The Information fields contain the residue count and the Additional Sense Code and Additional Sense
182. fined Data Partitions Not supported Always set to 0 Medium Format Recognition Partition Units Partition Size Set to O1h indicating that the drive supports automatic format recognition Not supported Always set to 0 Not supported Always set to 0 Logical Unit Control Page 18h This page contains the logical unit control parameters for READ and WRITE operations WA 7 6 5 4 3 2 1 0 0 PS SPF 0 Page Code 18h 1 Page Length 06h 2 Reserved Protocol Identifier 1h 3 29 Reserved Figure 4 70 Logical Unit Control MODE SENSE Page Data Format 4 126 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 71 Logical Unit Control MODE SENSE Page Field Descriptions Field Name Description PS Parameters Savable Not supported Always set to 0 SPF SubPage Format Always set to 0 Indicates that the drive uses the page_0 page format Page Code Identifies the type of MODE SENSE page being transferred A value of 18h identifies this as the Logical Unit Control page Page Length Indicates the number of bytes in the page excluding bytes 0 and 1 The length is returned on MODE SENSE and must subsequently be set to the same value when performing MODE SELECT Protocol A value of 1h indicates that this mode page applies to an SPI device For Identifier details see SCSI Primary Commands 3 SPC 3
183. for the TASK COMPLETE message with the ATN signal false If the SDLT tape drive receives the TASK COMPLETE message the drive handles it as an illegal message returning MESSAGE REJECT DISCONNECT 04h The SDLT tape drive sends the DISCONNECT message to inform the initiator that the drive is about to break the present connection by releasing the BSY signal and that a later reconnect is required to complete the current I O process The message does not cause the initiator to save the data pointer After sending the message the drive enters the BUS FREE phase by releasing the BSY signal The initiator may also send the DISCONNECT message to tell the drive to suspend the current phase and disconnect from the bus The drive s response to and its handling of a DISCONNECT message are based on when in the I O process the initiator sends the DISCONNECT message Table 3 4 summarizes the drive s response Table 3 4 Drive s Response to DISCONNECT Message BUS Phase Drive Response SELECTION The drive discards the DISCONNECT message and enters the BUS FREE phase 81 81200 02 REV A01 January 2005 3 5 Supported SCSI Messages SDLT 600 SCSI Interface Guide Table 3 4 Drive s Response to DISCONNECT Message Continued BUS Phase Drive Response COMMAND DATA STATUS MESSAGE IN The drive discards the DISCONNECT message and enters the BUS FREE phase The drive ignores the ATTENTION request while it fetches
184. ge BOTH Page 4 114 02h Disconnect Reconnect Page BOTH Page 4 116 OAh Control Mode Page BOTH Page 4 118 OFh Data Compression Page BOTH Page 4 120 81 81200 02 REV A01 January 2005 4 113 MODE SENSE 6 10 Command 1Ah 5Ah SDLT 600 SCSI Interface Guide Table 4 64 Supported MODE SENSE Block Pages and Page Codes Continued Page Code Description SENSE SELECT Refer to 10h Device Configuration Page BOTH Page 4 122 11h Medium Partition Page BOTH Page 4 125 18h Logical Unit Control Page BOTH Page 4 126 19h Port Control Page BOTH Page 4 127 1Ch TapeAlert Page BOTH Page 4 129 25h Vendor Specific Configuration Page BOTH Page 4 131 3Ch Disaster Recovery Control Page BOTH Page 4 133 3Eh EEPROM Vendor Specific Page BOTH Page 4 134 3Fh All Pages except EEPROM SENSE Read Write Error Recovery Page 01h The drive supports the Error Recovery Page for READ and WRITE operations The format of the Error Recovery Page is shown below ies 7 6 5 4 3 2 1 0 0 PS 0 Rsv d Page Code 01h 1 Page Length OAh 2 Reserved TB 0 Rsv d EER 1 PER DTE 0 DCR 0 3 READ Retry Count 4 7 Reserved 8 WRITE Retry Count 9 11 Reserved Figure 4 64 Read Write Error Recovery MODE SENSE Page Data Format 4 114 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 65 Read Write Error Recovery MODE SENSE
185. han the maximum time specified by the value of the MODE SELECT command Write Delay Time parameter the default is 10 seconds e When the drive receives a non write type media access command e When a RESET condition occurs SCSI Command Descriptions The SCSI command descriptions that make up the rest of this chapter contain detailed information about each command the SDLT tape drive supports The SCSI commands are presented in alphabetical order Fields common to many of the SCSI commands are not repeated for every command instead they are supported as shown in Table 4 5 Table 4 5 Fields Common to Many SCSI Commands Name of Field How Field is Supported in SCSI Commands Logical Unit Number LUN LUN for the SDLT tape drive is 0 Control All SCSI commands must have a Control byte which is implemented as described in SCSI Architecture Model 3 SAM 3 Reserved Reserved bits fields bytes and code values are set aside for future standardization and must be set to 0 If the drive receives a command that contains non zero bits in a reserved field or a reserved code value the drive terminates the command with a CHECK CONDITION status and the Sense Key is set to ILLEGAL REQUEST 81 81200 02 REV A01 January 2005 4 8 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Throughout this manual multiple bytes that contain information about specific command parameters are portrayed as shown in the example of the Pa
186. he CDB and a usage map for fields in the CDB of the command specified in the Reporting Options Requested Operation Code and Requested Service Action fields of the REPORT SUPPORTED OPERATION CODES CDB Bit Byte 7 5 4 3 2 1 0 0 Reserved 1 Reserved Support MSB 2 3 CDB Size n 3 LSB 4 n CDB Usage Data Figure 4 117 One command Parameter Data Data Format 4 212 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 125 One command Parameter Data Field Descriptions Field Description Support Indicates how the drive supports the requested command All values other than those listed are reserved Value Description 000b The drive cannot currently return data about the requested command All data following byte 1 is invalid Another request for command data may be successful 0001b The drive does not support the requested command All data following byte 1 is invalid 011b The drive supports the requested command as defined in the appropriate SCSI standards specification The parameter data after byte 1 is valid 101b The drive supports the requested command in a vendor specific manner The parameter data after byte 1 1s valid CDB Size Contains the size in bytes of the data returned in the CDB Usage Data field as well as the number of bytes in the CDB of the returned command CDB Contains information about the CDB of the
187. he data to tape Note that the buffer full empty ratio which is dynamic can cause the drive to write data sooner than the WRITE delay time value indicates The WRITE delay time defaults to 100 64h This causes the drive to flush the buffer after 10 seconds The minimum value is 15 Fh the maximum value is 6500 1964h representing a range in delay of 1 5 seconds to 11 minutes Data Recovery Not supported Always set to 0 Block Identifiers Supported This bit is supported and is always set to 1 Report Setmark Not supported Always set to 0 Automatic Velocity Control Not supported Always set to 0 Stop on Consecutive Filemarks Not supported Always set to 0 Recover Buffer Order Not supported Always set to 0 81 81200 02 REV A01 January 2005 4 123 MODE SENSE 6 10 Command 1Ah 5Ah SDLT 600 SCSI Interface Guide Table 4 69 Device Configuration MODE SENSE Page Field Descriptions Continued Field Name Description REW Report Early Warning Not supported Always set to 0 do not report Early Warning EOM on READ Gap Size Not supported Always set to 0 EOD Defined End of Data Always set to Oh EEG Enable EOD Generation When set to 1 indicates that the drive generates an EOD The drive generates an EOD mark before any change of direction following a WRITE type operation SEW Synchronize at Early Warning When set to 1 the drive writes any unwritten data or tapemarks to the medium
188. hreshold value Cumulative value greater than threshold value List Binary Not used List Parameter The drive treats the parameter codes as data counters Always set to 0 Specifies the number of bytes in the parameter value All parameters are 4 bytes in length except parameter 0005h which is 8 bytes in length Indicates the actual value of this log parameter January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 8 4 LAST n ERROR EVENTS Log Page 07h This page returns one parameter at a time that contains the ASCII text for the specified event log The Parameter Number field in the CDB specifies the log event to return The log events in EEPROM are numbered from 0 to 255 after which the number wraps back to 0 A maximum of 32 events are stored at a given time The log event returned is the first one whose parameter code is equal to or greater than the parameter number specified in the CDB us 7 6 5 4 3 2 1 0 0 Page Code 07h 1 Reserved MSB 2 3 Page Length LSB Figure 4 21 Last n Error Events LOG SENSE Page Header Format 81 81200 02 REV A01 January 2005 4 47 LOG SENSE Command 4Dh SDLT 600 SCSI Interface Guide Table 4 25 Last n Error Events LOG SENSE Header Field Descriptions Field Name Description Page Code Echoes the page code specified in the LOG SENSE CDB Page Length Specifies the total number of
189. ibed in the following table Table 4 138 ASC ASCQ for SEND DIAGNOSTIC Command ASC ASCQ Description 40h 80h Level 1 Controller Software EDC test failed 40h 81h Level 1 test failed RAM diagnostic failed 40h 82h Level 1 test failed bad drive status 40h 83h Level 1 test failed loader diagnostic failed 40h 84h Level 1 test failed POST has soft failure 40h 85h Level 1 Queue Handler test failed 40h 86h Level 1 Cache Interface test failed 40h 87h Level 1 drive Tape Alert Set 40h 88h Level 1 medium Tape Alert Set 4 236 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 32 SET DEVICE IDENTIFIER Command A4h The SET DEVICE IDENTIFIER command requests that the device identifier information in the SDLT tape drive be set to the value contained in the parameter list This information is then accessible using the REPORT DEVICE IDENTIFIER command The device identifier is persistent through Reset and power cycles On successful completion of a SET DEVICE IDENTIFIER command the drive generates a UNIT ATTENTION status for all initiators except the one that issued the command When the drive reports the UNIT ATTENTION status the Additional Sense Code is set to DEVICE IDENTIFIER CHANGED Bit Byte 7 6 5 4 3 2 1 0 0 Operation Code A4h 1 Reserved Service Action 06h 2 5 Reserved MSB 6 9 Parameter List Length LSB
190. ic Address LSB 12 Reserved 13 Scope Type 14 15 Obsolete 81 81200 02 REV A01 January 2005 4 139 PERSISTENT RESERVE IN Command 5Eh SDLT 600 SCSI Interface Guide Figure 4 79 PERSISTENT RESERVE IN Read Reservations Descriptor Data Format Table 4 80 PERSISTENT RESERVE IN Read Reservations Descriptor Field Descriptions Field Name Description Reservation Contains an 8 byte value that identifies the reservation key under which the Key persistent reservation is held Scope Specific Not supported Must be set to 0 Address Scope Indicates whether a persistent reservation applies to an entire logical unit to a part of the logical unit defined as an extent or to an element The drive only supports reservations of the entire logical unit Must be set to 0 Type Specifies the characteristics of the persistent reservation being established for all data blocks within the extent or within the logical unit Refer to Table 4 81 for the applicable Type codes and their meanings Table 4 81 describes the available Type values from the Type field of the PERSISTENT RESERVE IN Read Reservations parameters Each of the codes provides handling instructions for READ and WRITE operations and for subsequent attempts to establish persistent reservations referred to as Additional Reservations Allowed in the table Table 4 81 PERSISTENT RESERVATION IN Type Codes Code Name Description Oh Obsolete
191. icates a block descriptor is present and precedes the mode page data If any value other than 0 or 8 the drive terminates the command with CHECK CONDITION status Sense Key set to ILLEGAL REQUEST 4 72 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Mode Parameter Block Descriptor The following figure and table illustrate and describe the fields that make up the MODE SELECT command s Mode Parameter Block Descriptor Bit Byte 7 6 5 4 3 0 0 Density Code MSB 1 3 Number of Blocks LSB 4 MSB 5 7 Block Length LSB Figure 4 43 MODE SELECT Mode Parameter Block Descriptor Data Format 81 81200 02 REV A01 January 2005 4 73 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide Table 4 45 MODE SELECT Mode Parameter Block Descriptor Field Descriptions Field Name Description Density This field must contain one of the Density Code values listed below Code Density Code Description 00h Use default density 48h 133 000 bpi 56 logical tracks serial cartridge tape 110 0 GB 220 0 GB Super DLTtape I 49h 190 000 bpi 56 logical tracks serial cartridge tape 160 0 GB 320 0 GB Super DLTtape I 4Ah 233 000 bpi 40 logical tracks serial cartridge tape 300 0 GB 600 0 GB Super DLTtape Ip 50h 175 000 bpi 60 logical tracks serial cartridge tape
192. icates the number of bits per millimeter per track as recorded on the tape medium Note that the value is rounded up if the fractional value of the actual value is greater than or equal to 0 5 A value of 00h indicates that the number of bits per millimeter does not apply to the drive Indicates the width of the tape medium supported by this density This field is expressed in units of tenths of millimeters Indicates the number of data tracks supported on the medium by this density 4 202 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 118 REPORT DENSITY SUPPORT Data Block Descriptor Field Descriptions Continued Field Name Description Capacity Assigning Organization Density Name Description If the Media bit is set to 0 the Capacity field indicates the approximate capacity of the longest supported medium If the Media bit is set to 1 the Capacity field indicates the approximate capacity of the current medium The capacity assumes that compression is disabled If this density does not support an uncompressed format the capacity assumes that compression is enabled using average data The capacity also assumes that the media is in good condition and that normal data and block sizes are used The value is given in units of megabytes 1 048 576 bytes Note that the drive does not guarantee that this space is actually available in all cases
193. ide See nen 6 5 4 3 2 1 0 0 1 Parameter Code 2 DU DS TSD ETC TMC LBIN LP 3 Parameter Length 0Ch MSB 4 7 Time Stamp LSB MSB 8 11 Media ID LSB 12 Sense Key 13 Additional Sense Code 14 Additional Sense Code Qualifier 15 Additional Error Information Figure 4 33 Log Parameters Format for Device Wellness LOG SENSE Page Parameter Codes 0000h 000Fh 4 62 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 38 Log Parameters for Device Wellness LOG SENSE Page Field Descriptions Field Name Description Parameter Code DU DS TSD ETC TMC LBIN LP Time Stamp Media ID Sense Key Additional Sense Code Additional Sense Code Qualifier Additional Error Information Parameter codes 0000h through 000Fh are supported providing 16 log entries for error information capture Disable Update Always set to 0 Disable Save Not supported Always set to 1 Target Save Disable Not supported Always set to 1 Enable Threshold Comparison Not supported Always set to 0 Threshold Met Criteria Always set to 0 List Binary Not used List Parameter When set to 0 indicates that the parameter is a data counter Data counters are associated with one or more events The tape drive updates the data counter whenever one of these events occurs by incrementing the counter value When a
194. ide the drive s firmware revision levels The first 2 bytes are the version number for servo code The second 2 bytes are the version number of the SCSI read write code When a firmware update is performed on the SDLT tape drive the second two bytes of the revision level change to reflect that update See Vendor Specific Inquiry Data Page on page 4 17 for details about what types of vendor specific information are returned Indicates level of data clocking supported Set to 00b if only single edge transfers are supported set to 11b to indicate that both single and dual edge transfers are supported Ultra 160 81 81200 02 REV A01 January 2005 INQUIRY Command 12h SDLT 600 SCSI Interface Guide Table 4 8 Standard Inquiry Data Page Field Descriptions Continued Field Name Value Description QAS 0 Quick Arbitrate Supported Not supported Always set to 0 IUS 0 Information Units Supported Not supported Always set to 0 Version Descriptors Identifies the industry standards to which the drive conforms Note As many version descriptors as apply for the drive are returned 4 16 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Vendor Specific Inquiry Data Page The following information precisely identifies the revision of SDLT tape drive subsystem components Note Page content is subject to change at any time
195. ield Name Description PS Parameters Savable For MODE SELECT must be set to 0 Page Code Identifies the type of MODE SELECT page being transferred A value of O1h identifies this as the Read Write Error Recovery Page Page Length Indicates the number bytes in the page excluding bytes 0 and 1 The length is returned in MODE SENSE commands and must subsequently be set to the same value when performing MODE SELECT If the drive receives an unexpected page length value it returns a CHECK CONDITION status Sense Key set to ILLEGAL REQUEST TB Transfer Block Not supported EER Enable Early Recovery Must be set to 1 PER Post Error Default is 0 When set to 1 enables reporting of CHECK CONDITION to report recovered READ WRITE errors DTE Disable Transfer on Error Not supported Must be set to 0 DCR Disable ECC Correction Not supported Must be set to 0 Read Retry Count This field reports the maximum number of read retries the drive Write Retry Count attempts before reporting an unrecoverable error This field reports the maximum number of write retries the drive attempts before reporting an unrecoverable error 81 81200 02 REV A01 January 2005 4 77 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide 4 9 3 Disconnect Reconnect Page 02h The Disconnect Reconnect Page controls the drive s behavior on the SCSI bus and allows the host to tune bus performance
196. ient to read attribute values from Enhanced Medium Auxiliary Memory EMAM m 7 6 5 4 3 2 1 0 0 Operation Code 8Ch 1 Reserved Service Action 2 4 Restricted 00h 5 Volume Number 6 Reserved 7 Partition Number MSB 8 9 First Attribute Identifier LSB MSB 10 13 Allocation Length LSB 14 Reserved 15 Control Figure 4 84 READ ATTRIBUTE Command Descriptor Block Data Format Table 4 89 READ ATTRIBUTE Parameter Data Field Descriptions Field Name Description Service See READ ATTRIBUTE Service Action Codes on page 4 158 Action Volume Specifies a volume within the medium auxiliary memory Must be set to 0 Number Super DLTtape media comprises a single volume Partition Specifies a partition within a volume Must be set to 0 Super DLTtape media Number comprises a single partition 4 156 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 89 READ ATTRIBUTE Parameter Data Field Descriptions Continued Field Name Description First Specifies the attribute identifier of the first attribute to be returned Attribute Identifier Allocation Specifies how many bytes are allocated for the returned parameter list If the Length value in this field is not sufficient to contain the entire parameter list the drive returns the truncated list this is not considered an error If the r
197. igure 4 42 MODE SELECT 10 Mode Parameter Header Data Format 81 81200 02 REV A01 January 2005 4 71 MODE SELECT 6 10 Command 15h 55h Table 4 44 MODE SELECT Mode Parameter Header Field Descriptions Field Name Description Medium Type Buffered Mode Speed Block Descriptor Length The drive ignores this field Set to 1 by default The drive implements immediate reporting on WRITE commands through its buffered mode With Buffered Mode set to 1 the drive reports GOOD status on WRITE commands as soon as the data block has been transferred to the buffer If this field is set to 0 the drive does not report GOOD status on WRITE commands until it writes the data blocks to tape When Buffered Mode is not used the drive suffers significant performance and capacity degradation If Buffered Mode is set to a number greater than 1 the drive terminates the command with CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN CDB The drive supports a single speed of operation per format This field must be set to Oh If set to any other value the drive terminates the command with CHECK CONDITION status Sense Key set to ILLEGAL REQUEST Specifies the length in bytes of all the block descriptors Since the drive only allows one block descriptor the value must be either 0 or 8 A value of 0 indicates no block descriptor is included a value of 8 ind
198. imit Connect Time Limit Maximum Burst Size EMDP Fair Arbitration DIMM DTDC Not supported The drive ignores all values Not supported The drive ignores all values Not supported The drive ignores all values Indicates the the maximum amount of data that will be transferred without disconnecting in units of 512 bytes The default value is 80h for 64 KBytes Enable Modify Data Pointers Must be set to 0 Not supported Must be set to 0 Disconnect Immediate Must be set to 0 Data Transfer Disconnect Control Must be set to 0 81 81200 02 REV A01 January 2005 4 79 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide 4 9 4 Control Mode Page OAh The Control Mode Page provides control over several features such as tagged queuing extended contingent allegiance asynchronous event notification and error logging Bit Byte 7 6 5 4 3 2 1 0 0 PS 0 SPF 0 Page Code 0Ah 1 Page Length 0Ah 2 TST Reserved D Sense GLTSD RLEC 3 Queue Algorithm Modifier 0 Rsv d QErr 0 DQue 0 4 TAS RAC UA Intlck Ctrl SWP Obsolete 5 Reserved Autoload Mode 6 7 Obsolete MSB 8 9 Busy Timeout Period LSB MSB 10 11 Extended Self test Completion Time LSB Figure 4 47 Control Mode MODE SELECT Page Data Format Table 4 49 Control Mode MODE SELECT Page Field Descriptions Field Name Descri
199. ion MODE SENSE Page Field Descriptions 4 120 Device Configuration MODE SENSE Page Field Descriptions 4 123 Medium Partition MODE SENSE Page Field Descriptions 4 125 Logical Unit Control MODE SENSE Page Field Descriptions 4 127 Port Control MODE SENSE Page Field Descriptions 4 128 TapeAlert MODE SENSE Page Field Descriptions 4 130 Vendor Specific Configuration Control MODE SENSE Page Field Descriptions 4 132 Disaster Recovery Control MODE SENSE Page Field Descriptions 4 133 EEPROM Vendor Specific MODE SENSE Page Field Descriptions 4 134 PERSISTENT RESERVE IN Command Field Descriptions 4 136 Read Keys Parameters Field Descriptions 4 138 Read Reservations Parameters Field Descriptions 4 139 PERSISTENT RESERVE IN Read Reservations Descriptor Field Descriptions 4 140 PERSISTENT RESERVATION IN Type Codes 4 140 PERSISTENT RESERVE OUT Command Field Descriptions 4 143 PERSISTENT RESERVE OUT Command s Service Action Descriptions 4 144 PERSISTENT RESERVE OUT Type Codes 4 148 81 81200 02 REV A01 January 2005 Xiii List of Tables SDLT 600 SCSI Interface Guide Table 4 85 PERSISTENT RESERVE OUT Parameter List Field
200. ion Ratio LOG SENSE Page Field Descriptions Parameter Codes 02h through 09h Field Name Description Parameter Code DU DS TSD ETC TMC LBIN LP Parameter codes supported for the Read Write Compression Ratio Page codes 02h through 09h are as follows Code Description 02h MB Transferred to Host 03h Bytes Transferred to Host 04h MB Read from Tape 05h Bytes Read from Tape 06h MB Transferred from Host 07h Bytes Transferred from Host 08h MB Written to Tape 09h Bytes Written to Tape Disable Update Always set to 0 Disable Save Not supported Always set to 1 Target Save Disable Not supported Always set to 1 Enable Threshold Comparison Not supported Always set to 0 Threshold Met Criteria Always set to 0 List Binary Not used List Parameter The drive treats the parameter codes as data counters Always set to 0 81 81200 02 REV A01 January 2005 4 59 LOG SENSE Command 4Dh SDLT 600 SCSI Interface Guide Table 4 36 Log Parameters for Read Write Compression Ratio LOG SENSE Page Field Descriptions Parameter Codes 02h through 09h Continued Field Name Counter Value Description Parameter codes 02h through 09h provide a count of the number of bytes transferred since the last time the counters were reset with a LOG SELECT command or reset condition Parameter Codes 02h and 03h Report the count of bytes transferred from the drive to the initiator Paramete
201. ion and if the drive is the same SCSI device specified in the Third Party Device ID field Third Party Required if 3rdPty is set to 1 This field specifies the SCSI ID of the initiator Device ID whose third party reservation is being released This field must be used if the initiator of the original third party RESERVE is the source of the RELEASE 4 198 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 22 REPORT DENSITY SUPPORT Command 44h The REPORT DENSITY SUPPORT command is a 10 byte command that the application client uses to request information about the densities the SDLT tape drive supports Note that a reservation conflict occurs when the drive receives a REPORT DENSITY SUPPORT command from any initiator other than the one holding a logical unit reservation for the drive The figure below illustrates the format of the REPORT DENSITY SUPPORT command the table that follows explains the data fields of the command Bu 6 5 4 3 2 1 0 0 Operation Code 44h 1 Reserved Media 2 6 Reserved MSB 7 8 Allocation Length LSB 9 Control Figure 4 107 REPORT DENSITY SUPPORT Command Descriptor Block Data Format Table 4 116 REPORT DENSITY SUPPORT Command Field Descriptions Field Name Description Media When set to 0 the drive returns density support data blocks for the densities of any supported medium When set to 1
202. irection following a WRITE type operation Must be set to 1 SEW Synchronize at Early Warning When set to 1 the drive writes any unwritten data or tape marks to the tape medium before each command completes once the End of Medium early warning point is reached effectively operating as if in unbuffered mode When set to 0 the drive continues to operate in buffered mode if enabled past the End of Medium early warning point The default value is 1 SWP Software Write Protection Not supported Must be set to 0 Buffer Size at Not supported Must be set to 0 Early Warning Select Data When set to 1 enables data compression When set to 0 disables data Compression compression Algorithm Rewind on Reset Asoc WP PersWP PrmWP When set to 01b the drive rewinds the tape on a logical unit reset operation Associated Write Protection Not supported Must be set to 0 Persistent Write Protection Not supported Must be set to 0 Permanent Write Protection Not supported Must be set to 0 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 9 7 Medium Partition Page 11h The drive supports the Medium Partition Parameters Page which specifies the medium partitions Bus 7 6 5 4 3 2 1 0 0 PS 0 Rsv d Page Code 11h 1 Page Length 06h 2 Maximum Additional Partitions 0 3 Additional Partitions Defined
203. is rounded up if the fractional value of the actual value is greater than or equal to 0 5 The Medium Width field may vary for a given density depending on the mounted medium A value of 00h specifies the width of the tape is undefined ASSIGNING ORGANIZATION Identifies the organization responsible for the specifications defining the values in the MEDIUM DENSITY CODE attribute The Assigning Organization field is set to Quantum MEDIUM DENSITY CODE Contains the actual density of the tape based on the following rules 1 Ifthe tape has been written this attribute reports the actual density of the data on the medium 2 Ifthe host has selected a valid density with a MODE SELECT command this attribute reports the selected density 3 Ifneither 1 nor 2 is true this field reports the native density that can be written on this tape MEDIUM MANUFACTURE DATE Identifies the date of manufacture of the medium The format is YY YYMMDD that is 4 numeric ASCII characters for the year followed by 2 numeric ASCH characters for the month followed by 2 numeric ASCII characters for the day with no intervening spaces MAM CAPACITY The total capacity of the medium auxiliary memory in bytes at manufacture time It does not indicate the free space of an unused medium auxiliary memory because some of the medium auxiliary memory space may be reserved for device specific use making it inaccessible to the application client MEDIUM TYPE AND MEDIUM T
204. is written for original equipment manufacturers OEMs that are integrating the Quantum SDLT tape drive into a system or subsystem Background knowledge of the SCSI 3 SAM SPC SPI and SSC standards is assumed This document s primary audience is the OEM technical system integrators who are responsible for the SCSI interface In addition technically astute end users can use this manual for installation and operation of the tape drive although that group is a secondary audience Referenced Documents e Super DLTtape Interactive Library Interface Specification 6464162 01 81 81200 02 REV A01 January 2005 1 1 Related Documents SDLT 600 SCSI Interface Guide 1 3 Related Documents e SDLT 600 Fibre Channel Interface Guide 81 81202 02 e SDLT 600 Product Manual 81 81184 01 e Current standards documents available from www tl0 org SCSI Architecture Model SAM 2 SCSI Parallel Interface SPI 3 SCSI Primary Commands SPC 2 SCSI Stream Commands SSC ww v v v 1 4 Structure of this Manual e Chapter 1 Introduction is the chapter you are currently reading e Chapter 2 SCSI Parallel Protocol provides an overview of SDLT tape drive specific SCSI information Background knowledge of the SCSI 3 SAM SPC SPI and SSC standards is assumed Chapter 3 SCSI Messages lists and describes the SCSI messages supported by SDLT tape drives The SCSI message system allows communication between SCSI initiators and SCSI targets
205. ive supports this command for legacy applications only The RESERVE UNIT command reserves the specified SDLT tape drive for the exclusive use of the requesting initiator or for another specified SCSI device pus E 6 5 4 3 2 1 0 0 Operation Code 16h 1 Logical Unit Number 3rdPty Third Party Device ID Rsv d 2 4 Reserved 5 Control Figure 4 124 REQUEST SENSE Command Descriptor Block Data Format Table 4 133 RESERVE UNIT Command Data Field Descriptions Field Name Description 3rdPty The third party reservation option for RESERVE UNIT allows an initiator to reserve a logical unit for another SCSI device This option is intended for systems that use COPY and is implemented by the drive When set to 1 the drive is reserved for the SCSI device whose ID appears in the Third Party Device ID field The drive ignores any attempt made by any other initiator to release the reservation and returns a GOOD status When set to 0 no third party reservation is requested and the drive is reserved for the initiator that issued the CDB Third Party If 3rdPty is set to 1 indicating that an initiator has reserved the drive for Device ID another SCSI device this field contains the ID number of the SCSI device for which the reservation was made 4 230 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands A reservation with the RESERVE UNIT comm
206. l Combination 0 0 1 0 Illegal Combination 110 b 0 1 1 Level 1 Test and Level 2 Test with Drive and Media Health Check drive is on line 0 1 0 0 Level 1 Test only drive is on line 0 1 0 1 Illegal Combination 0 1 1 0 Level 1 Test drive is off line 1 1 1 Level 2 Test drive is off line Drive and Media Health Check This test checks for the highest priority DLTSage Tape Alert that has been set against the drive and or the media This information is reported in response to the next RECEIVE DIAGNOSTIC RESULTS command If the specified diagnostic test passes the drive returns GOOD status If the specified diagnostic test fails the drive returns CHECK CONDITION status with Sense Data containing information about the failure as described in the following table Table 4 137 Sense Keys for SEND DIAGNOSTIC Command Sense Key Description 3h Medium Error The drive returns a medium error if it encounters a Hard Read or Hard Write error during the test 4h Hardware Error The Additional Sense Code and any Additional Sense Code Qualifiers provide more specific information See Table 4 138 on page 4 236 for more information Sh ILLEGAL REQUEST Illegal parameter settings in the SEND DIAGNOSTIC command 81 81200 02 REV A01 January 2005 4 235 SEND DIAGNOSTIC Command 1Dh SDLT 600 SCSI Interface Guide Additional Sense Codes and Additional Sense Code Qualifiers that apply to SEND DIAGNOSTIC test results are descr
207. le When set to 0 indicates that the values these fields contain are accurate Position Error When set to 1 indicates that the drive is unable to report the correct position as a result of an overflow in any of the returned positional data fields When set to 0 indicates that there were no overflow conditions in any of the returned positional data fields The partition number for the current logical position The block address associated with the current logical position the next block to be transferred between the target and initiator if a READ or WRITE command is issued The block address associated with the current physical position the next block to be transferred to tape medium from the drive s buffer If the buffer is empty or has only a partial block the same value as First Block Location is reported The first block or filemark written onto the tape medium is at address 0 The number of data blocks in the drive s buffer that have not been written to the tape medium The number of data bytes in the drive s buffer that have not been written to the tape medium 81 81200 02 REV A01 January 2005 4 191 READ POSITION Command 34h SDLT 600 SCSI Interface Guide 4 18 2 Read Position Data Long Form Data returned when the service action value is 6 takes the following form Bit Byte 1 9 0 BOP EOP Reserved MPU LONU Reserved 1 3 Reserved MSB 4 7 Partition Number LSB MSB
208. le 4 88 READ Command Descriptor Block Field Descriptions Field Name Description SILI Suppress Incorrect Length Indicator If the SILI bit is set to 1 and the Fixed bit is set to 1 the drive terminates the command with CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN CDB If the SILI bit is set to 0 and the actual block length is different than the specified transfer length the drive returns CHECK CONDITION status Within the Sense Data the Incorrect Length Indicator ILI bit and Valid bit are set to 1 The Sense Key field is set to NO SENSE The information bytes are set to the difference residue between the requested transfer length and the actual block length or in Fixed Block mode the difference residue between the requested number of blocks and the actual number of blocks read No more than Transfer Length blocks are transferred to the initiator and the drive logically positions the tape after the block EOM side 81 81200 02 REV A01 January 2005 4 153 READ Command 08h SDLT 600 SCSI Interface Guide Table 4 88 READ Command Descriptor Block Field Descriptions Continued Field Name Description Fixed Transfer Length If the SILI bit is set to 1 The drive reports CHECK CONDITION status for an incorrect length condition only if the overlength condition exists and the Block Length field in the mode parameter block de
209. le MESSAGE phases The initiator is required to end the MESSAGE OUT phase by negating ATN when it sends certain messages that are identified in Table 3 3 When a connection to the SDLT tape drive is established that is the drive is selected with ATN asserted the first message byte passed by the initiator must be either an IDENTIFY ABORT TASK SET or TARGET RESET message If not the drive discards the message saves no status information and enters the BUS FREE phase If an initiator supplies an unsupported message for example TASK COMPLETE or a reserved or undefined message code the drive returns a MESSAGE REJECT message and continues where it left off possibly returning to MESSAGE OUT if ATN is raised 81 81200 02 REV A01 January 2005 3 1 Message Format SDLT 600 SCSI Interface Guide The first byte of the message as defined in Table 3 1 determines the format of the message Table 3 1 SCSI Message Format Message Code Message 00h Olh 02h 1Fh 20h 2Fh 30h 54h 55h 56h 7Fh 80h FFh One byte message TASK COMPLETE Extended message One byte message Two byte message Reserved One byte message Reserved One byte message IDENTIFY Two byte messages consist of two consecutive bytes The value of the first byte as defined in Table 3 1 determines which message will be transmitted The second byte is a parameter byte that is used as defined in the message description A
210. lh WRITE READS Shared any application client on any initiator can execute Exclusive commands that perform transfers from the drive to the host WRITES Exclusive any command from any initiator other than the initiator that holds the persistent reservation that attempts a transfer to the drive results in a reservation conflict ADDITIONAL RESERVATIONS Allowed any initiator may reserve the logical unit extents or elements as long as the persistent reservations do not conflict with any reservations already known to the drive 2h Obsolete 4 140 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 81 PERSISTENT RESERVATION IN Type Codes Continued Code Name Description 3h Exclusive Access 4h Obsolete 5h WRITE Exclusive Registrants Only 6h Exclusive Access Registrants Only Th Reserved Fh READS Exclusive any command from any initiator other than the initiator holding the persistent reservation that attempts a transfer from the drive results in a reservation conflict WRITES Exclusive any command from any initiator other than the initiator holding the persistent reservation that attempts a transfer to the drive results in a reservation conflict ADDITIONAL RESERVATIONS Restricted any PERSISTENT RESERVE OUT command with the Reserve service action from any initiator other than the initiator holding the persistent reservation result
211. licable See Figure 4 116 on page 4 211 for the command descriptor data format 4 210 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Bit Byte 7 6 5 4 3 2 1 0 0 Operation Code 1 Reserved MSB 2 3 Service Action LSB 4 Reserved 5 Reserved ServActV MSB 6 7 CDB Length LSB Figure 4 116 All commands Command Descriptor Data Format Table 4 124 All commands Command Descriptor Field Descriptions Field Description Operation The operation code of the returned command Code Service The service action of the returned command If the command does not have service Action actions this field is set to 00h ServActV Service Action Valid When set to 0 indicates that the returned command does not have service actions and that the Service Action field should be ignored When set to 1 indicates that the returned command has service actions and that the Service Action field contains valid information CDB Length Contains the length of the CDB indicated by the Operation Code and if the ServActV bit is set to 1 the Service Action fields 81 81200 02 REV A01 January 2005 4 211 REPORT SUPPORTED OPERATION CODES Command A3h SDLT 600 SCSI Interface Guide 4 25 2 One_command Parameter Data Format The REPORT SUPPORTED OPERATION CODES one_command parameter data format contains information about t
212. ll reservation keys If the last valid APTPL bit value is 1 the drive retains all persistent reservations and all reservation keys for all initiators even 1f power is lost and later restored The most recently received valid APTPL value from any initiator governs the drive s behavior in the event of a power loss January 2005 SDLT 600 SCSI Interface Guide 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands The following table illustrates the fields the application client sets and which the drive interprets for each service and scope value Table 4 86 SDLT Tape Drive Interpretation of Service and Scope Value Parameters Service Action Reservation Reservation Service Action Allowed Scope Type Key Key Register Ignored Ignored Valid Valid Reserve LU Valid Ignored Valid Release LU Valid Ignored Valid Clear Ignored Ignored Ignored Valid Pre empt LU Valid Valid Valid Pre empt amp LU Valid Valid Valid Clear Register and Ignored Ignored Valid Ignored Ignore Existing Key 81 81200 02 REV A01 January 2005 4 151 PREVENT ALLOW MEDIUM REMOVAL Command 1Eh SDLT 600 SCSI Interface Guide 4 13 PREVENT ALLOW MEDIUM REMOVAL Command 1Eh This command enables or disables unloading the data cartridge Each initiator maintains the PREVENT ALLOW status in the drive separately Bus i 7 0 0 Operation Code 1Eh 1 Reserved 2 3 Reserved 4 Res
213. lock Data Format 4 181 Figure 4 94 READ BLOCK LIMITS Data Data Format 4 181 Figure 4 95 READ BUFFER Command Descriptor Block Data Format 4 183 Figure 4 96 READ BUFFER Header Data Format 4 186 Figure 4 97 READ BUFFER Descriptor Data Format 4 187 Figure 4 98 ECHO BUFFER Descriptor Data Format 4 188 Figure 4 99 READ POSITION Command Descriptor Block Data Format 4 189 Figure 4 100 READ POSITION Short Form Data Format 4 190 Figure 4 101 READ POSITION Long Form Data Format 4 192 Figure 4 102 RECEIVE DIAGNOSTIC RESULTS Command Descriptor Block Data Format 4 194 Figure 4 103 RECEIVE DIAGNOSTIC RESULTS Data Format 4 195 Figure 4 104 RELEASE 10 Command Descriptor Block Data Format 4 196 Figure 4 105 RELEASE 10 ID Only Parameter List Data Format 4 197 Figure 4 106 RELEASE UNIT Command Descriptor Block Data Format 4 198 Figure 4 107 REPORT DENSITY SUPPORT Command Descriptor Block Data Format 4 199 Figure 4 108 REPORT DENSITY SUPPORT Header Data Format 4 200 Figure 4 109 REPORT DENSITY SUPPORT Data Block Descriptor Data Format 4 201 Figure 4 110 REPORT DEVICE
214. m block length The drive supports a maximum block length of 16 777 215 16 MB 1 for DLTtape formats For Super DLTtape formats the maximum block length is 16 777 212 16 MB 4 Indicates the minimum block length Minimum block lengths vary depending on the format the drive is using For Super DLTtape format the minimum block length is 4 4 182 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 17 READ BUFFER Command 3Ch The READ BUFFER command is used with the WRITE BUFFER command as a diagnostic function for testing the SDLT tape drive s data buffer for possible diagnostic data and for checking the integrity of the SCSI bus Buffers 01h and 02h provide a diagnostic capability for the drive s firmware buffer 03h is used to read the DMARK table and buffers Alh and A2h provide access to diagnostic error information Bit Byte 7 6 4 3 D 0 0 Operation Code 3Ch 1 Reserved Mode 2 Buffer ID MSB 3 5 Buffer Offset LSB MSB 6 8 Allocation Length LSB 9 Comp Control Figure 4 95 READ BUFFER Command Descriptor Block Data Format 81 81200 02 REV A01 January 2005 4 183 READ BUFFER Command 3Ch SDLT 600 SCSI Interface Guide Table 4 107 READ BUFFER Command Descriptor Block Field Descriptions Field Name Description Mode The drive supports the following values for this field Set
215. m type attributes see Table 4 102 are hard coded into the medium auxiliary memory at the time of manufacture All supported medium type attributes have a status of read only Table 4 102 Medium Type Attributes for EMAM Supported by the SDLT Tape Drive Firmware Attribute Attribute Identifier Name Length Format Details 0400h MEDIUM MANUFACTURER 8 ASCII Page 4 175 0401h MEDIUM SERIAL NUMBER 32 ASCII Page 4 176 0402h MEDIUM LENGTH 4 BINARY Page 4 176 0403h MEDIUM WIDTH 4 BINARY Page 4 176 0404h ASSIGNING ORGANIZATION 8 ASCII Page 4 176 0405h MEDIUM DENSITY CODE 1 BINARY Page 4 176 0406h MEDIUM MANUFACTURE 8 ASCII Page 4 176 DATE 0407h MAM CAPACITY 8 BINARY Page 4 176 0408h MEDIUM TYPE and MEDIUM 1 BINARY Page 4 176 TYPE INFORMATION 0409h MEDIUM TYPE INFOMATION 2 BINARY Page 4 176 040Ah Reserved O7FFh MEDIUM MANUFACTURER Contains 8 bytes of ASCII data see Attribute Format on page 4 163 identifying the vendor of the media 81 81200 02 REV A01 January 2005 4 175 READ ATTRIBUTE Command 8Ch SDLT 600 SCSI Interface Guide MEDIUM SERIAL NUMBER Identifies the manufacturer s serial number for the medium MEDIUM LENGTH Specifies the length of the medium in meters A value of 00h specifies that the length of the medium is undefined MEDIUM WIDTH Specifies the width of the medium supported by this density The value is expressed in units of tenths of millimeters The value in this field
216. mber of times the drive performed a Read retry during the Read previous load of the medium Retries Count Total Indicates the amount of data physically written to the medium since the last Amount of medium format This value is expressed in increments of 1 048 576 bytes that is Data a value of 1 means 1 048 576 bytes 2 means 2 097 152 bytes and so on Written Total Write Indicates the total number of times the drive performed a Write retry since the last Retries medium format Count Total Indicates the amount of data physically read from the medium since the last Amount of medium format This value is expressed in increments of 1 048 576 bytes that is Data Read a value of 1 means 1 048 576 bytes 2 means 2 097 152 bytes and so on Total Read Indicates the number of times the drive performed a Read retry since the last Retries medium format Count Load Indicates the number of loads since the last medium format This count Count accumulates over the life of the medium but it is reset to 0 after a medium format Total Indicates the number of times that switches between partitions have been Change performed on the medium Must be set to 0 Super DLTtape media comprises a Partition single volume Count Total Indicates number of times that any of the partitions on the medium have been Partition erased This count accumulates over the life of the medium but it is reset to O after Initialize a medium format Count 81 81200
217. mory condition the drive allows it An application is allowed to write an attribute marked as read only to the host vendor unique area but this attribute can never be deleted NOTE The format of the host vendor unique attributes contents are up to the host to determine 4 15 4 Unique Features of the SDLT Tape Drive Implementation of Read Write Attributes Keep these features and considerations in mind Super DLTtape media does not support the non existent state for attributes All attributes that exist are reported in the attribute list and attribute values The SDLT tape drive does not support deleting standard host type attributes WRITE ATTRIBUTE commands with attribute length of 0 The only attributes that can be deleted are host vendor unique attributes Super DLTtape media only supports ASCII text in the TEXT LOCALIZATION IDENTIFIER attribute Super DLTtape media does not require that attributes be written using the WRITE ATTRIBUTE command in ascending order The attributes that can be written are independent of one another and can be written in any order Since EMAM is written to the tape there is always a short window during which the tape is loaded but the attributes have not been read from the tape and stored in RAM If during this brief span of time the drive receives a READ ATTRIBUTE or WRITE ATTRIBUTE command it responds with the Sense Key set to NOT READY and the Additional Sense Code set to LOGICAL UNIT NOT READY
218. n Standard Inquiry or a Vital Product Data page LOAD UNLOAD 0 LOCATE 0 LOG SELECT Parameter List must be 0 LOG SENSE Allocation Log Page MODE Parameter List Mode Parameter SELECT 6 10 Header 4 Block Descriptor 8 Page s MODE Allocation Mode Parameter SENSE 6 10 Header 4 Block Descriptor 8 Page s PERSISTENT Allocation Parameter Data RESERVE IN PERSISTENT Parameter Parameter List RESERVE OUT Length PREVENT ALLOW 0 MEDIUM REMOVAL READ Transfer Data READ BLOCK 0 Block Length Limits LIMITS READ BUFFER Allocation Buffer Offset and Allocation Length and or Test Data READ POSITION Determined by Position Identifier or Long Bit SCSI Logical Address RECEIVE Allocation Diagnostic Page DIAGNOSTIC RESULTS 81 81200 02 REV A01 January 2005 4 5 Overview of SCSI Command and Status Processing SDLT 600 SCSI Interface Guide Table 4 4 DATA Phase Command Contents Continued Command Lengthin CDB Data Out To Drive Data In From Drive REPORT DENSITY Allocation Density Support SUPPORT Header 4 Density Support Descriptors REPORT DEVICE Allocation Device Identification IDENTIFIER Information REPORT LUNS Allocation Supported LUNs List REPORT Allocation Depends on Parameter SUPPORTED Value OPERATION CODES REPORT Allocation List of the Various Task SUPPORTED TASK Management Functions MANAGEMENT Supported
219. n clears the drive also clears this bit CInEx Set to 1 if the cleaning tape has expired If no cleaning tape is installed the drive clears this bit 4 66 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 9 MODE SELECT 6 10 Command 15h 55h The MODE SELECT commands enable the host to configure the SDLT tape drive Before configuring the drive the host should issue a MODE SENSE command to the drive to obtain a report of the current configuration and determine which parameters are configurable The host interprets this information and then may issue MODE SELECT to set the drive to the host s preferred configuration The host passes the Mode Parameter List described in Mode Parameter List on page 4 69 to the drive during the command s DATA OUT phase Operating parameters for the drive are contained in several pages The following table lists the MODE SELECT pages supported and the location of the sections in this manual detailing each page Page Code Description Refer to Olh Read Write Error Recovery Page Page 4 76 02h Disconnect Reconnect Page Page 4 78 0Ah Control Mode Page Page 4 80 OFh Data Compression Page Page 4 82 10h Device Configuration Page Page 4 84 11h Medium Partition Page Page 4 87 18h Logical Unit Control Page Page 4 89 19h Port Control Page Page 4 90 1Ch TapeAlert Page Page 4 92 25h Vendor Specific Configuration Page Page 4 95 3Ch Disaster R
220. n the page excluding bytes 0 and 1 The length is returned on MODE SENSE and must subsequently be set to the same value when performing MODE SELECT If the drive receives an unexpected page length value it returns a CHECK CONDITION status Sense Key set to ILLEGAL REQUEST Protocol A value of 1h indicates that this mode page applies to an SPI device For Identifier details see SCSI Primary Commands 3 SPC 3 4 90 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 54 Port Control MODE SELECT Page Field Descriptions Continued Field Name Description Synchronous Transfer Timeout Indicates the maximum amount of time in 1 msec increments that the drive waits before generating an error by performing an unexpected BUS FREE operation The drive enters the BUS FREE phase only if one of the following events causes the timer after it is started not to reset or reload before it expires e Ifthere is a REQ transition when there are no outstanding REQs waiting for an ACK load and start the timer e If there is a REQ transition when there are any outstanding REQs waiting for an ACK there is no effect on the timer e Ifthere is an ACK transition when there are outstanding REQs waiting for an ACK load and start the timer e If after an ACK transition there are no outstanding REQs waiting for an ACK stop the timer A value of 0000h indicates that this fu
221. nctionality is disabled A value of FFFFh indicates an unlimited timeout period 81 81200 02 REV A01 January 2005 4 91 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide 4 9 10 TapeAlert Page 1Ch The drive supports the TapeAlert Page which sets or changes the supported TapeAlert configuration options Use the MODE SENSE command to read the settings of the TapeAlert page Bit Byte 6 5 4 3 2 1 0 0 PS 0 Rsv d Page Code 1Ch 1 Page Length 0Ah 2 Rsv d EBF EWASC DExcpt Test Rsv d LogErr 3 Reserved MRIE MSB 4 7 Interval Timer LSB MSB 8 11 Report Count Test Flag Number LSB Figure 4 53 TapeAlert MODE SELECT Page Data Format Table 4 55 TapeAlert MODE SELECT Page Field Descriptions Field Name Description PS Parameters Savable For MODE SELECT must be set to 0 Page Code Identifies the type of MODE SELECT page being transferred A value of 1Ch identifies this as the TapeAlert Page Page Length Indicates the number of bytes in the page excluding bytes 0 and 1 The length is returned on MODE SENSE and must subsequently be set to the same value when performing MODE SELECT If the drive receives an unexpected page length value it returns a CHECK CONDITION status Sense Key set to ILLEGAL REQUEST Perf Performance Performance Impacting Exceptions are acceptable The drive ignores this bit EBF Enabl
222. nd mor 7 6 5 4 3 2 1 0 0 PS 0 Rsv d Page Code 25h 1 Page Length 08h 2 Default Density Override 3 Reserved 4 9 Reserved Figure 4 54 Vendor Specific Configuration MODE SELECT Page Data Format 81 81200 02 REV A01 January 2005 4 95 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide Table 4 56 Vendor Specific Configuration MODE SELECT Page Field Descriptions Field Name Description PS Parameters Savable Must be set to 0 Page Code Identifies the type of MODE SELECT page being transferred A value of 25h identifies this as the Vendor Specific Configuration Page Page Length Indicates the number bytes in the page excluding bytes 0 and 1 The length is returned in MODE SENSE commands and must subsequently be set to the same value when performing MODE SELECT If the drive receives an unexpected page length value it returns a CHECK CONDITION status with the Sense Key set to ILLEGAL REQUEST Default Density The following density codes are the preferred codes used to define Override density Code Description 00h Density override disabled 4Ah 233 000 bpi 40 logical tracks serial cartridge tape 300 0 GB 600 0 GB Super DLTtape II This 1 byte field holds the setting of the density desired on a Write From BOT It can be set at any time but is zeroed out during a tape cartridge load Therefore for the override to be meaningful it
223. nd four fields are set to the read and write statistics that the test collected 81 81200 02 REV A01 January 2005 4 195 RELEASE 10 Command 57h SDLT 600 SCSI Interface Guide 4 20 RELEASE 10 Command 57h NOTE This command has been made obsolete in the latest version of SCSI 3 and should not be used with any new implementations The SDLT tape drive supports this command for legacy applications only The RELEASE and RESERVE commands provide contention resolution in multiple initiator systems The RELEASE 10 command releases a previously reserved logical unit The SDLT tape drive does not return an error if an initiator attempts to release a reservation that is not currently valid EG 7 6 5 4 3 2 1 0 0 Operation Code 57h 1 Reserved 3rdPty Reserved LongID Extent 0 2 Reservation Identification 3 Third Party Device ID 4 6 Reserved MSB 7 8 Parameter List Length LSB 9 Control Figure 4 104 RELEASE 10 Command Descriptor Block Data Format 4 196 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 114 RELEASE 10 Command Field Descriptions Field Name Description 3rdPty Third Party Release allows an initiator to release a previously reserved logical unit When set to 0 third party release is not requested When set to 1 the drive releases the specified logical unit but only if the i
224. nd support data for a specific command Buc lf 6 5 4 3 2 1 0 0 Operation Code A3h 1 Reserved Service Action 0Ch 2 Reserved Reporting Options 3 Requested Operation Code MSB 4 5 Requested Service Action LSB MSB 6 9 Allocation Length LSB 10 Reserved 11 Control Figure 4 114 REPORT SUPPORTED OPERATION CODES Command Descriptor Block Data Format 4 208 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 122 REPORT SUPPORTED OPERATION CODES Command Descriptor Block Field Descriptions Field Description Service A service action of 0Ch identifies this as the REPORT SUPPORTED OPERATION Action CODES command Reporting Specifies the type of information to be returned in the parameter data All values other than Options those listed are reserved Value Description 000b The drive returns a list of all supported operation codes and service actions in the all_commands parameter data format The drive ignores any values in the Requested Operation Code and Requested Service Action fields See All commands Parameter Data Format on page 4 210 for more information 001b The drive returns the command support data in the one_command parameter data format for the operation code specified in the Requested Operation Code field The drive ignores any value in the Requested Service Action field If the Request
225. ng starts at 0 Volume Number Number of Indicates the number of volumes that are available SDLT tape drives only Volumes support one volume on the medium Available 81 81200 02 REV A01 January 2005 4 161 READ ATTRIBUTE Command 8Ch SDLT 600 SCSI Interface Guide PARTITION LIST Service Action The READ ATTRIBUTE command with the PARTITION LIST service action returns parameter data see Figure 4 88 identifying the number of partitions supported in the specified volume number The contents of the Partition Number and First Attribute Identifier fields in the CDB are ignored Peu 6 5 4 3 2 1 0 MSB 0 1 Available Data 02h LSB 2 First Partition Number 3 Number of Partitions Available Figure 4 88 READ ATTRIBUTE with PARTITION LIST Service Action Parameter List Format Table 4 94 READ ATTRIBUTE with PARTITION LIST Service Action Parameter Data Field Descriptions Field Name Description Available Preset to 02h Data First Indicates the first partition available on the specified volume number Partition Partition numbering starts at 0 Number Number of Indicates the number of partitions that are available SDLT tape drives only Partitions support one partition on the medium Available 4 162 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 15 3 Enhanced Medium Auxiliary Memory EMAM Attributes This se
226. nitiator ID 3rdPty bit and Third Party Device ID are identical to those of the RESERVE command that established the reservation LongID When set to 1 the Parameter List Length is 8 and the 8 bytes of the parameter list carry the device ID of the third party device The drive ignores the contents of the Third Party Device ID in the CDB byte 3 Extent The drive supports reservations only on entire logical units Must be set to 0 Reservation The drive ignores the value in this field Identification Third Party If the Third Party Device ID value that is connected with the reservation Device ID release is less than 255 the LongID bit may be set to 0 and the ID value can be sent in the CDB If the LongID bit is set to 0 the Parameter List Length field must also be set to 0 If the Third Party Device ID value is greater than 255 the LongID bit must be set to 1 Parameter The contents of this field specify the length in bytes of the parameter list List Length transferred from the initiator to the drive Note Assuming that the RELEASE CDB is valid the drive always returns GOOD status for this command An actual release only happens if the initiator has the drive reserved for itself or a third party initiator If LongID is set to 1 and Extent is set to 0 the parameter list length is 8 bytes and the parameter list has the following format Bit Byte 6 5 4 3 2 1 0 MSB 0 7 Third Party Device ID LSB
227. not set to 1 the drive writes any data or Filemarks in the WRITE cache buffer to tape Bit Byte 7 6 5 4 3 2 1 0 0 Operation Code 10h 1 Reserved WSMK 0 Immed MSB 2 4 Transfer Length LSB 5 Control Figure 4 136 WRITE FILEMARKS Command Descriptor Block Data Format Table 4 147 WRITE FILEMARKS Command Field Descriptions Field Name Description WSMK Immed Transfer Length Write Setmark Not supported Must be set to 0 Immediate When set to 0 the drive does not return status until all buffered data and Filemarks are written to the medium When set to 1 the drive returns status as soon as it validates the CDB If set to 1 and the drive is not operating in Buffered mode see Table 4 44 on page 4 72 the drive returns a CHECK CONDITION status with the Sense Key set to ILLEGAL REQUEST and the Additional Sense Code set to INVALID FIELD IN CDB Contains the number of consecutive Filemarks to be written to the tape medium A value of 0 is not considered an error the drive returns GOOD status The WRITE FILEMARKS command can be used to force the drive to write any buffered WRITE data to the tape medium If the drive is in Buffered mode when it receives a WRITE FILEMARKS command it appends the requested Filemarks to the data and flushes the WRITE buffer contents to the tape medium A value of 0 in the Number of Filemarks field indicates that no Filemarks a
228. nt in the TapeAlert Log page The setting of the MRIE field does not impact logging of events in the TapeAlert Log page Interval Always set to 0 Timer Report Always set to 0 Count Test Flag Number Vendor Specific Configuration Control Page 25h This page controls the operation of the Vendor Specific Configuration Control Mode for the drive pir 7 6 5 4 3 2 1 0 0 PS 0 Rsv d Page Code 25h 1 Page Length 08h 2 Default Density Override 3 Reserved 4 9 Reserved Figure 4 73 Vendor Specific Configuration Control MODE SENSE Page Data Format 81 81200 02 REV A01 January 2005 4 131 MODE SENSE 6 10 Command 1Ah 5Ah SDLT 600 SCSI Interface Guide Table 4 74 Vendor Specific Configuration Control MODE SENSE Page Field Descriptions Field Name Description PS Parameters Savable Always set to 0 Page Identifies the type of MODE SENSE page being transferred A value of 25h Code identifies this as the Vendor Specific Configuration Control Page Page Indicates the number bytes in the page excluding bytes 0 and 1 The length is Length returned in MODE SENSE commands and must subsequently be set to the same value when performing MODE SELECT Default The following density codes are the preferred codes used to define density Density Override Code Description 00h Density override disabled 4Ah 233 000 bpi 40 logical tracks serial cartridge ta
229. ock Data Format 81 81200 02 REV A01 January 2005 4 39 LOG SENSE Command 4Dh SDLT 600 SCSI Interface Guide Table 4 22 LOG SENSE Command Descriptor Block Field Descriptions Field Name Description PPC SP PC Page Code Parameter Pointer Control When set to 0 indicates that the parameter data requested from the drive starts with the parameter code specified in the Parameter Pointer field bytes 5 6 and returns the number of bytes specified in the Allocation Length field bytes 7 8 in ascending order of parameter codes from the specified log page When set to 1 the drive returns only the parameters that have changed since the last time the page was read Save Parameters Not supported Must be set to 0 If the Save Parameters bit 1s set to 1 the drive terminates the command with CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN CDB Page Control This field defines the type of parameter values to be returned Code Type of Parameter Values 00b Threshold Values 01b Cumulative Values 10b Default Threshold Values 11b Default Cumulative Values e The Default Threshold Values are the maximum values that each parameter can attain The Current Cumulative values are the values computed since the last reset of the drive by power cycle TARGET RESET or SCSI RESET The Default Cumulative values are the values to which each paramete
230. og Parameters Format for Device Wellness LOG SENSE Page Parameter Codes 0000h xSDODEBIW po odbas ofi eee tal oka efte oe tint aude ind af otc add t eats a 4 62 Figure 4 34 Device Status LOG SENSE Page Header Format 4 64 Figure 4 35 Log Parameters Format for Device Status LOG SENSE Page 4 64 Figure 4 36 Cleaning Related Log Parameters Format for Device Status LOG SENSE Page 4 66 Figure 4 37 MODE SELECT 6 Command Descriptor Block Data Format 4 68 Figure 4 38 MODE SELECT 10 Command Descriptor Block Data Format 4 68 Figure 4 39 MODE SELECT 6 Mode Parameter List Data Format 4 69 Figure 4 40 MODE SELECT 10 Mode Parameter List Data Format 4 70 Figure 4 41 MODE SELECT 6 Mode Parameter Header Data Format 4 71 Figure 4 42 MODE SELECT 10 Mode Parameter Header Data Format 4 71 Figure 4 43 MODE SELECT Mode Parameter Block Descriptor Data Format 4 73 Figure 4 44 MODE SELECT Page Descriptor Data Format 4 75 Figure 4 45 Read Write Error Recovery MODE SELECT Page Data Format 4 76 Figure 4 46 Disconnect Reconnect MODE SELECT Page Data Format 4 78 Figure 4 47 Control Mode MODE SELECT Page Data Format 4 80 Figure 4 48 Data Compression MODE SELECT Page Data Format
231. og Parameters for Last n Error Events LOG SENSE Page Field Descriptions 4 48 Table 4 27 Sequential Access Device LOG SENSE Header Field Descriptions 4 49 Table 4 28 Sequential Access Device LOG SENSE Page Parameters Field Descriptions 4 50 Table 4 29 Temperature LOG SENSE Header Field Descriptions 4 5 Table 4 30 Temperature LOG SENSE Parameters Field Descriptions 4 52 Table 4 31 TapeAlert Page LOG SENSE Header Field Descriptions 4 53 Table 4 32 TapeAlert Page LOG SENSE Parameters Field Descriptions 4 54 Table 4 33 TapeAlert Flags Severity Levels and Meanings 4 55 Table 4 34 Read Write Compression Ratio LOG SENSE Header Field Descriptions 4 57 Table 4 35 Log Parameters for Read Write Compression Ratio LOG SENSE Page Field Descriptions Parameter Codes OOhandOlh 4 58 Table 4 36 Log Parameters for Read Write Compression Ratio LOG SENSE Page Field Descriptions Parameter Codes 02h through 09h 4 59 Table 4 37 Device Wellness LOG SENSE Header Field Descriptions 4 61 Table 4 38 Log Parameters for Device Wellness LOG SENSE Page Field Descriptions 4 63 Table 4 39 Device Status LOG SENSE Header Field Descriptions 4 64 Table 4 40 Log Pa
232. ol Mode page Page Length Indicates the number of bytes in the Control Mode Page being transferred The value for this byte is OAh TST Task Set Type Always set to 0 The drive maintains a single task set for all initiators D_Sense Descriptor Format Sense Data Always set to 0 The drive always returns fixed format autosense data 4 118 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 67 Control Mode MODE SENSE Page Field Descriptions Continued Field Name Description GLTSD Global Logging Target Save Disable Always set to 0 RLEC Report Log Exception Condition Indicates whether the drive returns CHECK CONDITION status with Sense Key set to UNIT ATTENTION 06h when one of its WRITE and READ error counters reaches a specified threshold When set to 0 indicates that the drive does not return UNIT ATTENTION when a threshold has been met When set to 1 indicates that the drive returns UNIT ATTENTION when a threshold is met Queue Algorithm Always set to 0 Modifier QErr Queue Error Always set to 0 DQue Disable Queuing Always set to 0 TAS Task Aborted Status Always set to 0 The drive does not return a status for tasks aborted by the actions of other initiators RAC Report a Check Always set to 0 The drive returns BUSY status rather than CHECK UA Intlck Ctrl SWP Autoload Mode Busy Timeout Period Eztended Self test Completion Time
233. on fields contain the residue count The Additional Sense Code and Additional Sense Code Qualifier fields are set to FILEMARK DETECTED Upon termination the drive logically positions the medium after the Filemark If the drive detects End of Data EOD during a READ it returns CHECK CONDITION status Within the Sense Data the Valid bit is set to 1 and the Sense Key field is set to BLANK CHECK The information fields contain the residue count The Additional Sense Code Qualifier fields are set Upon termination the drive physically positions the medium after the last block on tape 4 154 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 14 2 End of Medium Partition Handling The meaning of EOM is different for a READ command than it is for a WRITE related command The drive reports EOM only when it encounters the physical EOM or End of Partition EOP The drive returns a CHECK CONDITION status The EOM and Valid bits are set to 1 and the Sense Key field is set to MEDIUM ERROR The information fields contain the residue count and the Additional Sense Code and Additional Sense Code Qualifier fields are set to EOM P DETECTED The drive physically positions the medium at EOM P 81 81200 02 REV A01 January 2005 4 155 READ ATTRIBUTE Command 8Ch SDLT 600 SCSI Interface Guide 4 15 READ ATTRIBUTE Command 8Ch The READ ATTRIBUTE command see Figure 4 84 allows an application cl
234. onditions if such reports of recovered errors are allowed by returning CHECK CONDITION status on the next SCSI command except INQUIRY and REQUEST SENSE commands following detection of the condition The drive sets the Sense Key to RECOVERED ERROR with an Additional Sense Code of 5Dh 00h TapeAlert Event The SCSI command with the CHECK CONDITION status completes without error before the report of any exception condition and does not need to be repeated 04h Unconditionally Generate Recovered Error The drive reports informational exception conditions by returning CHECK CONDITION status on the next SCSI command except INQUIRY and REQUEST SENSE commands following detection of the condition The drive sets the Sense Key to RECOVERED ERROR with an Additional Sense Code of 5Dh 00h TapeAlert Event The SCSI command with the CHECK CONDITION status completes without error before the report of any exception condition and does not need to be repeated 81 81200 02 REV A01 January 2005 4 93 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide Table 4 55 TapeAlert MODE SELECT Page Field Descriptions Continued Field Name Description Interval Timer Report Count Test Flag Number 06h Only Report Informational Exception Condition on Request The drive preserves information exception data To access the data issue an unsolicited REQUEST SENSE command The drive sets the Sense Key to N
235. ons that are not a routine part of commands from the initiator A value of 0000h is undefined A value of FFFFh specifies an unlimited busy timeout period Extended Self test Contains advisory data that an application client uses to determine the time in Completion Time seconds that the drive requires to complete an extended self test when the drive is not interrupted by additional commands and no errors occur during execution of the self test The application client should expect this time to increase significantly if it sends other commands to the drive while a self test is in progress or if errors occur during execution of the self test 4 9 5 Data Compression Page OFA The Data Compression Page specifies parameters for the control of data compression This page allows an initiator to turn the SDLT tape drive s compressed format on and off independently of the position of the tape medium Bit Byte 7 6 5 4 3 2 1 0 0 PS Rsv d Page Code 0Fh 1 Page Length 0Eh 2 DCE DCC 1 Reserved 3 DDE 1 RED 0 Reserved MSB 4 7 Compression Algorithm 10h LSB MSB 8 11 Decompression Algorithm 10h LSB 12 15 Reserved Figure 4 48 Data Compression MODE SELECT Page Data Format 4 82 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 50 Data Compression MODE SELECT Page Field Descriptions Field Name D
236. ontinued Field Name TMC LBIN LP Parameter Length Parameter Value Description Threshold Met Criteria This field is valid only if the host sets the ETC bit to 1 This field determines the basis for comparison The host specifies this field using the LOG SELECT command If the result of comparison is true cumulative threshold and the MODE SELECT SENSE Control Mode Page RLEC bit is set to 1 the drive generates a UNIT ATTENTION for all initiators In that case the drive sets the Sense Key to UNIT ATTENTION the Additional Sense Code to LOG EXCEPTION and the Additional Sense Code Qualifier to THRESHOLD CONDITION MET If the RLEC bit in Control Mode Page is 0 the drive does not generate a UNIT ATTENTION Note that comparison is performed in real time A LOG SENSE command need not be issued to get the CHECK CONDITION status Once ETC is selected and the RLEC bit in Control Mode Page is set to 1 the drive issues a CHECK CONDITION status based on the criteria defined in the TMC bits if the criteria is met in real time The CHECK CONDITION status does not identify for which parameter code the criterion is met The host must issue a LOG SENSE command to read the counters to determine for which parameter code the criterion has been met The criteria for comparison are Code 00b 01b 10b 11b Basis of Comparison Every update of the cumulative value Cumulative value equal to threshold value Cumulative value not equal to t
237. or details see Figure 4 109 REPORT DENSITY SUPPORT Data Data Block Block Descriptor Data Format on page 4 201 Descriptor 4 200 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands The figure and table that follow provide information about the Density Support Data Block Descriptor field of the header Bit Byte 7 6 5 4 3 2 1 0 0 Primary Density Code 1 Secondary Density Code 2 WrtOk DUP Deflt Reserved 3 4 Reserved MSB 5 7 Bits Per MM LSB MSB 8 9 Media Width LSB MSB 10 11 Tracks LSB MSB 12 15 Capacity LSB MSB 16 23 Assigning Organization LSB MSB 24 31 Density Name LSB MSB 32 51 Description LSB Figure 4 109 REPORT DENSITY SUPPORT Data Block Descriptor Data Format 81 81200 02 REV A01 January 2005 4 201 REPORT DENSITY SUPPORT Command 44h SDLT 600 SCSI Interface Guide Table 4 118 REPORT DENSITY SUPPORT Data Block Descriptor Field Descriptions Field Name Description Primary Density Code Secondary Density Code WrtOK DUP Deflt Bit Per MM Media Width Tracks Contains the value returned by a MODE SENSE command for the density described in the remainder of the Density Support Data Block Descriptor When multiple density code values are assigned to the same recording technology this field lists the
238. ors are also handled by drive managed retries Refer to Chapter 3 SCSI Messages for more detailed message handling information SCSI command level errors are communicated by a status code that the drive returns during the STATUS phase This phase occurs at the end of each command unless one of the following events terminates the command e ABORT TASK SET message TARGET RESET message e Reset condition e Unexpected disconnect The status code is contained in bits 1 through 5 of the status byte Bits 0 6 and 7 are reserved Table 4 2 describes the status codes the drive returns 81 81200 02 REV A01 January 2005 4 3 Overview of SCSI Command and Status Processing SDLT 600 SCSI Interface Guide Table 4 2 Status Codes Status Code Definition Meaning 00h GOOD The drive successfully completed the command 02h CHECK An exception condition occurred and the drive has established CONDITION a Contingent Allegiance condition 08h BUSY The drive cannot currently service the command and has discarded the CDB The initiator may retry the command later 18h RESERVATION The drive returns this status when an initiator attempts to CONFLICT reserve the drive when another initiator has already reserved it with a RESERVE UNIT RESERVE 10 or PERSISTENT RESERVE OUT command The drive never returns this status for INQUIRY or REQUEST SENSE commands 4 1 2 DATA Phase Command Components Many of the SCSI commands cause data
239. other initiators pre empted are removed by the Pre empt amp Clear service action The Reservation Key for an initiator that has sent a Pre empt amp Clear action with its own Reservation Key specified in the service action s Reservation Key remains unchanged although all other specified clearing actions releasing actions and reservation actions are performed Persistent reservations are not superseded by a new persistent reservation from any initiator except by executing a PERSISTENT RESERVE OUT command that specifies either the Pre empt or Pre empt amp Clear service action New persistent reservations not in conflict with an existing persistent reservation execute normally Behaves like the Register 00h action except that it ignores the Reservation Key in the parameter list and treats it as 1f it matched the current registration if one exists for the initiator 81 81200 02 REV A01 January 2005 4 147 PERSISTENT RESERVE OUT Command 5Fh SDLT 600 SCSI Interface Guide The following table presents the definitions of the available Type values from the Type field of the PERSISTENT RESERVE OUT Read Reservations parameters Each of the codes provides handling instructions for READ operations for WRITE operations and for subsequent attempts to establish persistent reservations referred to as Additional Reservations Allowed in the table Table 4 84 PERSISTENT RESERVE OUT Type Codes Code Name Description Oh
240. overed error Disables ejection of the cartridge at the completion of an unload operation initiated by a SCSI LOAD UNLOAD command Sets the value of the allowed maximum marginal channel Valid values are 0 to 7 When set to 1 the drive reports BUSY status if it is in the process of becoming ready When set the drive reports a UNIT ATTENTION when the EMAM data is available When set to 1 the drive reports a recovered error if parity error retried successfully Sets the default value of the PER bit of the Read Write Error Recovery Mode Page 01h Obsolete 81 81200 02 REV A01 January 2005 4 101 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide Table 4 58 EEPROM Vendor Specific MODE SELECT Page Parameter Descriptions Data Parameter Name Type Default Length Bytes Usage RewindOnReset Binary ASCII Decimal SageLoadCountThresh SCSDInq Binary SCSI3Sense Binary SCSIBusDMATimer Decimal SCSIReselRetries Decimal SCSIResReINOP Binary SCSIXferMax Decimal 1 50 10 1 When set to 1 the drive rewinds the tape medium to BOT on reset When set to 0 the drive does not rewind on BUS RESET or BDR message Caution Partial block data may be written to tape if reset occurs during WRITE Sets the Load Count Tape Alert Warning Threshold to 100 times the input value e g 50 5 000 2 200 etc When set to 1 data ret
241. page code specified in the LOG SENSE CDB Page Length Specifies the number of bytes available and depends on the parameters requested Bit Byte 7 6 5 4 3 2 1 0 MSB 0 1 Parameter Code Temperature LSB 2 DU DS TSD ETC TMC LBIN LP 3 Parameter Length 02h MSB 4 5 Parameter Value LSB Figure 4 26 Log Parameters Format for Temperature Page 81 81200 02 REV A01 January 2005 4 51 LOG SENSE Command 4Dh SDLT 600 SCSI Interface Guide Table 4 30 Temperature LOG SENSE Parameters Field Descriptions Field Name Description Parameter Code DU DS TSD ETC TMC LBIN LP Parameter Length Parameter Value Parameter codes supported for the Temperature page are as follows Code Description 0000h Current operating temperature degrees Celsius 0001h Reference temperature degrees Celsius This is the maximum reported sensor temperature at which the tape drive is capable of operating continuously without experiencing degradation beyond the limits specified in the Product Manual for this product Disable Update Always set to 0 Disable Save Not supported Always set to 1 Target Save Disable Not supported Always set to 0 Enable Threshold Comparison Threshold checking is not supported on this page Always set to 0 Threshold Met Criteria Ignored Always set to 0 List Binary Always set to 1 List Parameter The drive treats the parameter codes as data counters Always set to
242. pe 300 0 GB 600 0 GB Super DLTtape II This 1 byte field holds the setting of the density desired on a Write from BOT It can be set at any time but is zeroed out during a cartridge load For the override to be meaningful it must be set after the drive loads the cartridge After being set its value overrides any application resetting the drive to default density 0 with a MODE SELECT command 4 132 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Disaster Recovery Control Page 3Ch This page controls the operation of the Disaster Recovery Control Mode for the drive feel om 6 5 4 3 2 1 0 0 PS 0 Rsv d Page Code 3Ch 1 Page Length 4 2 Reserved DRAct 3 5 Reserved Figure 4 74 Disaster Recovery Control MODE SENSE Page Data Format Table 4 75 Disaster Recovery Control MODE SENSE Page Field Descriptions Field Name Description PS Parameters Savable Always set to 0 Page Code Identifies the type of MODE SENSE page being transferred A value of 3Ch identifies this as the Disaster Recovery Control Page Page Length Indicates the number bytes in the page excluding bytes 0 and 1 The length is returned in MODE SENSE commands and must subsequently be set to the same value when performing MODE SELECT DRAct Disaster Recovery Active When set to 1 the drive operates in Disaster Recovery mode When set to 0
243. place in case you need to restore data from it 81 81200 02 REV A01 January 2005 4 55 LOG SENSE Command 4Dh SDLT 600 SCSI Interface Guide Table 4 33 TapeAlert Flags Severity Levels and Meanings Continued Severity Flag Level Meaning 20 Clean Now Critical The drive needs to be cleaned Make sure that all tape operations have completed eject the data cartridge and follow the appropriate steps to use a cleaning cartridge For detailed instructions about how to clean the tape drive using a cleaning cartridge refer to the User Reference Guide for this product 22 Expired Critical The cleaning cartridge in use has expired Wait for all Cleaning Media tape drive operations to complete then use a valid cleaning cartridge 31 Hardware B Critical The drive may have a hardware fault Contact a service representative 32 Interface Warning The drive has identified a problem with the interface to or from the host 34 Download Fail Warning The attempted firmware download failed 36 Drive Warning The temperature inside the drive exceeds the allowable Temperature specifications Note The drive issues this warning 3 degrees C below the maximum temperature threshold so that you can provide additional cooling before potential damage occurs 38 Predictive Critical A hardware failure of the drive is predicted Call the Failure tape drive supplier help line to arrange for a replacement 51 Tape Directory Warning A
244. ported Vital Product Data Page 00h 4 19 Unit Serial Number Page 80h 4 20 Device Identification Page 83h 4 21 Firmware Build Information Page COh 4 25 Subsystem Components Revision Page Clh 4 26 LOAD UNLOAD Command IBh 4 28 LOCATE Command 2Bh iii nes aa WA Kai ce O tne e nent e eens 4 30 LOG SELECT Command 4Ch 4 3 Overview LOG SELECT Command Descriptor Block Errors 4 33 Operation of LOG SELECT Dr resci ee ce eee ee es Shae e e e o eq e rdc e S 4 33 LOG SELECT Log Page Format iia kua aa 4 34 Error Detection Summary in LOG SELECTPages 4 38 LOG SENSE Command 4Dh 4 6 644 eR e e ee dd ee RACER ae ae ea nk sce ER a 4 39 Error Summary in LOG SENSE Command Descriptor Block 4 41 Supported Pages Log Page Page O00h 4 42 Read Page 03h Write Page 02h Error Log Page 4 43 LAST n ERROR EVENTS Log Page 07h 4 47 vi January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Table of Contents Sequential Access Device Log Page OCh
245. pressed data The drive always returns 00h Compression The value for this field is 10h indicating that the Lempel Ziv high Algorithm efficiency data compression algorithm is in use Decompression The value for this field is 10h indicating that the Lempel Ziv high Algorithm efficiency data decompression algorithm is in use If EEPROM parameter EnaRepDCcomp is set the drive reports a value of 0 if the last block read is not decompressed 81 81200 02 REV A01 January 2005 4 121 MODE SENSE 6 10 Command 1Ah 5Ah SDLT 600 SCSI Interface Guide Device Configuration Page 10h The drive supports the Device Configuration Page The format for the page is shown below TO NE 6 5 4 3 2 1 0 0 PS 0 Rsv d Page Code 10h 1 Page Length 0Eh 2 Rsv d Obsolete CAF 0 Active Format 0 3 Active Partition 0 Write Buffer Full Ratio 5 Read Buffer Empty Ratio MSB 6 7 Write Delay Time LSB 8 DBR 0 BIS 1 RSmk 0 AVC 0 SOCF 0 RBO 0 REW 0 9 Gap Size 0 10 EOD Defined 0 EEG SEW SWP Reserved MSB 11 13 Buffer Size at Early Warning 0 LSB 14 Select Data Compression Algorithm 15 Reserved Rewind on Reset AsocWP PersWP PrmWP Figure 4 68 Device Configuration MODE SENSE Page Data Format 4 122 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter
246. ption PS Parameters Savable For MODE SELECT must be set to 0 SPF SubPage Format Always set to 0 Indicates that the drive uses the page_0 page format Page Code Identifies the type of MODE SELECT page being transferred A value of OAh identifies this as the Control Mode Page Page Length Indicates the number of bytes in the page excluding bytes 0 and 1 The length is returned in MODE SENSE commands and must subsequently be set to the same value when performing MODE SELECT If the drive receives an unexpected page length value it returns a CHECK CONDITION status Sense Key set to ILLEGAL REQUEST 4 80 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 49 Control Mode MODE SELECT Page Field Descriptions Continued Field Name Description TST Task Set Type The drive maintains a single task set for all initiators Must be set to 0 D_Sense Descriptor Format Sense Data Not supported Must be set to 0 GLTSD Global Logging Target Save Disable Must be set to 0 RLEC Report Log Exception Condition When set to 1 specifies that the drive reports log exception conditions When set to 0 specifies that the drive does not report log exception conditions The RLEC bit works with the Read Write Error LOG SENSE page specifically the TMC bit of the Read Write Error LOG SENSE page page 02h and 03h described in Table 4 24 on page 4 44 RLEC indicates whether th
247. r REQUEST 20h 00h Ilegal OpCode 20h 81h Illegal Command While In Recovery Mode 24h 00h Invalid CDB Field May occur if odd block counts are attempted in fixed mode 24h 82h Media in Drive 24h 83h Command Queue Not Empty 24h 84h Insufficient Resources 24h 86h Invalid Offset 24h 87h Invalid Size 24h 89h Write Buffer Overrun 24h 8Ch Not Immediate Command 25h 00h Illegal LUN 26h 00h Parameter List Error Invalid Field 26h Olh Parameter List Error Parameter Not Supported 26h 02h Parameter List Error Parameter Value Invalid 26h 04h Invalid Release of Persistent Reservation 26h 88h Out of Sequence Image Data 4 224 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 131 Supported ASC ASCQ Hex for REQUEST SENSE Command Continued Text Name Sense Key ASC ASCQ Description 26h 89h Image Data Over Limit 26h 8Ah Update in Progress 26h 8Bh Image Personality is Bad 26h 8Dh Bad Drive Server Image EDC 26h 8Eh Invalid Personality for Code Update CUP 26h 8Fh Bad Controller Image EDC 26h 90h CUP File Header Failed Validation 26h 91h Bad Loader Image EDC 26h 92h CUP Failed Unsupported Code Rev 26h 93h CUP With Different Product Code Image 2Ch 00h Command sequence error 30h 00h Incompatible Medium Drive Cannot Read Medium 30h 02h Incompatible Format Drive Cannot Read Medium 39h 00h Saving Parameters not Supported 3Bh 11h Medium Magazine not Accessible 3Bh 12h Medium
248. r DLT 4000 DLT 7000 and DLT 8000 tape drives 81 81200 02 REV A01 January 2005 4 103 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide The following is a sample of an EEPROM vendor specific page that modifies the VendorID parameter to XXXYY 0 0 0 Page Code 3Eh 1 Page Length OFh 2 y 76h 3 e 65h 4 n 6Eh 5 d 64h 6 o 6Fh 7 r 72h 8 i 69h 9 d 64h 10 20h 11 X 58h 12 X 58h 13 X 58h 14 Y 59h 15 Y 59h 16 AOh or 00h Figure 4 57 EEPROM Vendor Specific Page Vendor ID Example Data Format 4 104 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 9 14 Changeable Parameters Within MODE SELECT The following table lists the MODE SELECT command s changeable parameters and their default minimum and maximum values Descriptions of the various parameters are provided in the discussions of the different MODE SELECT mode pages NOTE Parameter rounding is supported for all parameters except the Block Descriptor Length parameter Table 4 59 Changeable Mode Parameters Within MODE SELECT Page Parameter Default Minimum Maximum Header Buffered Mode Device Specific Byte 1 0 1 Block Descriptor Length 08h 00h 08h Block Descriptor Block Length 0 0 FFFFFCh
249. r Width Exponent 7 Reserved DT_ Rsv d REQ Figure 3 4 PARALLEL PROTOCOL REQUEST Message Data Format The PPR message is required to configure an SDLT tape drive This command sets the transfer period offset transfer width and clocking all in one message Support for the PPR message is indicated by the Clocking field in the Standard Inquiry page The PPR message can also be used to set the transfer period offset and transfer width on an SDLT tape drive with an Ultra 2 interface card To enable it set the MODE SELECT Vendor Specific EEPROM parameter EnablePPRMsg to 1 The PPR message allows the host and target devices to negotiate operating conditions of the SCSI bus An SDLT tape drive responds to a PPR message with a reciprocal PPR message containing acceptable parameters for the interface An SDLT tape drive never initiates a PPR negotiation Details about how to configure the PPR message are shown in Table 3 8 3 10 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 3 SCSI Messages Table 3 8 Features of the PARALLEL PROTOCOL REQUEST Message Field Description DT REQ Double Transition Clocking Request This bit indicates a request for Double Transition Clocking which means that two units of data are transferred for each clock cycle Support for the PPR message is indicated by the Clocking field in the Standard Inquiry page Transfer Width Valid transfer widths for th
250. r code 02h reports the number of full megabytes transferred parameter code 03h reports the number of bytes less than a full megabyte transferred Multiplying the counter returned for parameter code 02h by 1 048 576 and then adding the value of the counter returned by parameter code 03h results in the actual total bytes transferred to the initiator Parameter Codes 04h and 05h Report the count of bytes transferred from the drive to the buffer Parameter code 04h reports the number of full megabytes transferred parameter code 05h reports the number of bytes less than a full megabyte that have been transferred Multiplying the counter returned for parameter code 04h by 1 048 576 and then adding the value of the counter returned by parameter code 05h results in the actual total bytes transferred from tape to the buffer Parameter Codes 06h and 07h Report the count of bytes transferred from the initiator to the buffer Parameter code 06h reports the number of full megabytes transferred parameter code 07h reports the number of bytes less than a full megabyte that have been transferred Multiplying the counter returned for parameter code 06h by 1 048 576 and then adding the value of the counter returned by parameter code 07h results in the actual total bytes transferred from the initiator to the buffer Parameter Codes 08h and 09h Report the count of bytes written to the drive Parameter code 08h reports the number of full megabytes trans
251. r is initialized at a reset condition Default values are 0 e By default Current Threshold Values are set to Default Threshold Values The Page Code field identifies the log page the initiator requested If the drive does not support the specified page the drive terminates the command with CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN CDB The drive supports the following pages Page Page Code Definition 00h Supported Pages Log Page Page 4 42 02h Write Error Log Page Page 4 43 03h Read Error Log Page Page 4 43 07h Last n Error Events Log Page Page 4 47 4 40 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 22 LOG SENSE Command Descriptor Block Field Descriptions Continued Field Name Description OCh Sequential Access Device Log Page Page 4 49 0Dh Temperature Log Page Page 4 51 2Eh TapeAlert Log Page Page 4 53 32h Read Write Compression Ratio Log Page Page 4 57 33h Device Wellness Log Page Page 4 61 3Eh Device Status Log Page Page 4 64 Parameter The Parameter Pointer field allows the host to specify at which parameter within Pointer a log page the requested data should begin For example if a page supports parameters 0 through 5 and the Parameter Pointer contains 3 the drive returns only parameters 3 4 and 5 to the host Similarly if a page supports parameters 1 3 and 6 and the Par
252. r that has not previously performed a Register service action with the drive that attempts a transfer to the tape medium results in a reservation conflict 7h Reserved Not applicable Fh 4 148 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands The PERSISTENT RESERVE OUT command requires a parameter list shown in the following figure and defined in the following table Every PERSISTENT RESERVE OUT command sends all of the fields of the parameter list even if the field is not required for the specific service action or scope values Bs i 6 5 4 3 2 1 0 MSB 0 7 Reservation Key LSB MSB 8 15 Service Action Reservation Key LSB MSB 16 19 Scope Specific Address LSB 20 Reserved Spec I All TG Rsv d APTPL PT PT 21 Reserved 22 23 Obsolete Figure 4 81 PERSISTENT RESERVE OUT Parameter List Data Format 81 81200 02 REV A01 January 2005 4 149 PERSISTENT RESERVE OUT Command 5Fh Table 4 85 PERSISTENT RESERVE OUT Parameter List Field Descriptions Field Name Description Reservation Contains an 8 byte token that the application client provides to the drive to Key identify the initiator that is the source of the PERSISTENT RESERVE OUT command For all service actions except Register and Ignore Existing Key the drive verifies that the Reservation Key in the PERSISTENT RESERVE O
253. r the pre empted initiators The Sense Key is set to UNIT ATTENTION the Additional Sense Code is set to RESERVATIONS PREEMPTED Commands that follow are subject to the persistent reservation restrictions set by the pre empting initiator The persistent reservation the pre empting initiator created is defined by the Scope and Type fields of the PERSISTENT RESERVE OUT command and the corresponding fields of the command s parameter list The Pre empt service action removes the registration keys for the pre empted initiators the Reservation Key for an initiator that has performed a Pre empt service action with its own Reservation Key specified in the service action Reservation Key remains unchanged although all other specified releasing actions and reservation actions are performed Note that persistent reservations are not superseded by a new persistent reservation from any initiator except by the execution of a PERSISTENT RESERVE OUT command that specifies either the Pre empt or the Pre empt amp Clear service actions New persistent reservations that do not conflict with an existing persistent reservation execute normally 4 146 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 83 PERSISTENT RESERVE OUT Command s Service Action Descriptions Continued Code Name Description 05h 06h Pre empt amp Clear Register and Ignore Key A PERSISTENT RESE
254. rameter List Length field bytes 7 to 8 of the LOG SELECT command shown as follows Bit Byte 7 6 5 4 3 2 1 0 Bytes 0 6 MSB 7 8 Parameter List Length LSB This sample indicates that the most significant bit MSB of the field 1s bit 7 of byte 7 the least significant bit is bit 0 of byte 8 The shorthand version of presentation is used in this manual to save space This is an alternate shorthand presentation for Bit Byte 7 6 5 4 3 2 1 0 Bytes 0 6 7 MSB Parameter List Length LSB 81 81200 02 REV A01 January 2005 4 9 ERASE Command 19h SDLT 600 SCSI Interface Guide 4 3 ERASE Command 19h The ERASE command erases the data on the tape medium The SDLT tape drive erases the data only if the Long bit is set to 1 and the drive receives the ERASE command while it is at Beginning of Tape BOT If the Long bit is set to 0 this command has no effect on the tape medium NOTE The time required to completely erase a Super DLTtape II cartridge is more than 3 hours eral 6 5 4 3 2 1 0 0 Operation Code 19h 1 Reserved Immed Long 2 4 Reserved 5 Control Figure 4 1 ERASE Command Descriptor Block Data Format Table 4 6 ERASE Command Descriptor Block Field Descriptions Field Description Immed Immediate If set to 0 the drive does not return
255. rameters for Device Status LOG SENSE Page Field Descriptions 4 65 Table 4 41 Log Parameters for Device Status LOG SENSE Parameter 0001h Cleaning Related Field Deseriptions s AA Se eso PADRE os xe xe D Ne een eee RM edes 4 66 Table 4 42 MODE SELECT 6 10 Command Descriptor Block Field Descriptions 4 69 Table 4 43 MODE SELECT Mode Parameter List Field Descriptions 4 70 Table 4 44 MODE SELECT Mode Parameter Header Field Descriptions 4 72 Xii January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide List of Tables Table 4 45 Table 4 46 Table 4 47 Table 4 48 Table 4 49 Table 4 50 Table 4 51 Table 4 52 Table 4 53 Table 4 54 Table 4 55 Table 4 56 Table 4 57 Table 4 58 Table 4 59 Table 4 60 Table 4 61 Table 4 62 Table 4 63 Table 4 64 Table 4 65 Table 4 66 Table 4 67 Table 4 68 Table 4 69 Table 4 70 Table 4 71 Table 4 72 Table 4 73 Table 4 74 Table 4 75 Table 4 76 Table 4 77 Table 4 78 Table 4 79 Table 4 80 Table 4 81 Table 4 82 Table 4 83 Table 4 84 MODE SELECT Mode Parameter Block Descriptor Field Descriptions 4 74 MODE SELECT Page Descriptor Field Descriptions 4 75 Read Write Error Recovery MODE SELECT Page Field Descriptions 4 77 Disconnect Reconnect MODE SELECT Page Field Descriptions 4 79 Control Mode MODE SELECT Page
256. re 4 16 LOG SELECT Log Page Parameters Format Table 4 21 Field Name LOG SELECT Log Parameters Field Descriptions Description Parameter Code Parameter codes supported for the READ WRITE error counter pages are as follows Code Description 0000h Errors corrected without substantial delays 0001h Errors corrected with possible delays 0002h Total read write errors 0003h Total read write errors 0004h Total times correction algorithm processed Always 0 for write errors only 0005h Total bytes processed 0006h Total uncorrected errors 8000h WRITE errors since last READ page 02 or READ errors since last WRITE page 03 8001h Total raw write error flags 8002h Total dropout error count 81 81200 02 REV A01 January 2005 LOG SELECT Command 4Ch SDLT 600 SCSI Interface Guide Table 4 21 LOG SELECT Log Parameters Field Descriptions Continued Field Name Description 8003h Total servo tracking errors 9000h Without substantial delay errors by channel 9007h 9080h Write only Possible delay errors assignable to specific 9087h channels Read only Raw sub block read errors by channel Note Many of these errors are write not read errors and are not to be included in read error rate calculations If these errors are used to try to identify bad channels the bad channel may be on either the writing or reading drive Note Parameter codes 00h 01h and 04h always have a value of 0
257. re ter EE UE VR DR En E RUPEE EE RS MERC 4 215 Table 4 127 TASK MANAGEMENT FUNCTIONS Command Parameter Data Field Descriptions 4 215 Table 4 128 REQUEST SENSE Command Data Field Descriptions 4 216 Table 4 129 REQUEST SENSE Data Field Descriptions 4 218 Table 4 130 Supported Sense Keys for REQUEST SENSE Command 4 220 Table 4 131 Supported ASC ASCQ Hex for REQUEST SENSE Command 4 221 Table 4 132 RESERVE 10 Command Field Descriptions 4 229 Table 4 133 RESERVE UNIT Command Data Field Descriptions 4 230 Table 4 134 REWIND Command Data Field Description 4 232 Table 4 135 SEND DIAGNOSTIC Command Data Field Descriptions 4 233 Table 4 136 SEND DIAGNOSTIC CDB Fields Selftst DevOfl and UnitOfl 4 235 Table 4 137 Sense Keys for SEND DIAGNOSTIC Command 4 235 Table 4 138 ASC ASCQ for SEND DIAGNOSTIC Command 4 236 Table 4 139 SET DEVICE IDENTIFIER Command Descriptor Block Field Descriptions 4 238 Table 4 140 SET DEVICE IDENTIFIER Parameter List Field Description 4 238 Table 4 141 SPACE Command Data Field Descriptions 4 239 Table 4 142 VERIFY Command Data Field Descriptions 4 242 Table 4 143 WRIT
258. re to be written to the tape medium but still flushes any WRITE data to the tape if Immed is set to 0 4 252 January 2005 81 81200 02 REV A01
259. received in the previous Echo Buffer mode WRITE BUFFER command from the same initiator If a previous Echo Buffer mode WRITE BUFFER command did not complete successfully the drive terminates the Echo Buffer mode READ BUFFER command with a CHECK CONDITION status with Sense Key set to ILLEGAL REQUEST and the Additional Sense Code set to COMMAND SEQUENCE ERROR If the data in the Echo Buffer has been overwritten by another initiator the drive terminates the command with a CHECK CONDITION status with Sense Key set to ABORTED COMMAND and the Additional Sense Code set to ECHO BUFFER OVERWRITTEN 81 81200 02 REV A01 January 2005 4 187 READ BUFFER Command 3Ch SDLT 600 SCSI Interface Guide 4 17 6 Echo Buffer Descriptor Mode OBh In this mode the drive returns a maximum of 4 bytes of READ BUFFER descriptor information The drive returns the descriptor information for the Echo Buffer The Buffer Offset field is reserved in this mode The allocation length should be set to 4 or greater The drive transfers the lesser of the allocation length or 4 bytes of the READ BUFFER descriptor su TM 6 5 4 3 2 1 0 0 Reserved EBOS 1 Reserved 2 Reserved Buffer Capacity 3 Buffer Capacity Figure 4 98 ECHO BUFFER Descriptor Data Format Table 4 109 ECHO BUFFER Descriptor Field Descriptions Field Name Description EBOS Echo Buffer Overwritten Supported Set to 1 to indicate that the drive
260. returns a GOOD status 81 81200 02 REV A01 January 2005 LOCATE Command 2Bh SDLT 600 SCSI Interface Guide 4 6 LOCATE Command 2Bh The LOCATE command performs high speed positioning to a specified block address Use the READ POSITION command to obtain the block address associated with the current position on tape Then use the LOCATE command to position the tape at the same logical position for high performance restore operations of particular blocks of data Byte E 7 6 5 4 3 2 1 0 0 Operation Code 2Bh 1 Reserved BT CP Immed 2 Reserved MSB 3 6 Logical Object Identifier LSB 7 Reserved 8 Partition 9 Control Figure 4 13 LOCATE Command Descriptor Block Data Format Table 4 17 LOCATE Command Descriptor Block Field Descriptions Field Name Description BT Block Type The drive ignores this bit CP Change Partition The drive does not support multiple partitions Always set to 0 Immed Immediate When set to 1 the drive returns status as soon as the operation starts When set to 0 the drive returns status after the operation has completed Logical Object Specifies the Logical Object Identifier to which the drive positions the Identifier medium Partition Not applicable the drive ignores this bit See CP field above 4 30 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 7 LOG SELECT
261. rface Guide Chapter 4 SCSI Commands Active Format Active Partition Write Buffer Full Ratio Read Buffer Empty Ratio Write Delay Time DBR BIS RSmk AVC SOCF Table 4 51 Device Configuration MODE SELECT Page Field Descriptions Field Name Description PS Parameters Savable For MODE SELECT must be set to 0 Page Code Identifies the type of MODE SELECT page being transferred A value of 10h identifies this as the Device Configuration Page Page Length Indicates the number bytes in the page excluding bytes 0 and 1 The length is returned in MODE SENSE commands and must subsequently be set to the same value when performing MODE SELECT If the drive receives an unexpected page length value it returns a CHECK CONDITION status Sense Key set to ILLEGAL REQUEST CAF Change Active Format Not supported Must be set to 0 Not supported Must be set to 0 The drive only supports partition 0 Setting this field to any other value causes the drive to reject the command and return a CHECK CONDITION status Sense Key set to ILLEGAL REQUEST The drive sets this field to 0 The drive uses an automatic adaptive mechanism to adjust its Write Buffer Full Ratio according to the average data rates over the SCSI bus The drive sets this field to 0 The drive uses an automatic adaptive mechanism to adjust its Read Buffer Empty Ratio according to the average data rates over the SCSI bus Indicates the maximum time in 100 m
262. rive and the host Bit Byte 7 6 5 4 3 1 0 0 Page Code 0Ch 1 Reserved MSB 2 3 Page Length LSB Figure 4 23 Sequential Access Device LOG SENSE Page Header Format Table 4 27 Sequential Access Device LOG SENSE Header Field Descriptions Field Name Description Page Code Echoes the page code specified in the LOG SENSE CDB Page Length Specifies the total number of bytes contained in this log page excluding the 4 bytes that make up the header Bit Byte 7 6 5 4 3 1 0 MSB 0 1 Parameter Code LSB 2 DU DS TSD ETC TMC Rsv d LP 3 Parameter Length 4 11 Parameter Value 1 The byte 2 fields are collectively referred to as the Parameter Control Byte Figure 4 24 Log Parameters Format for Sequential Access Device LOG SENSE Page 81 81200 02 REV A01 January 2005 4 49 LOG SENSE Command 4Dh SDLT 600 SCSI Interface Guide Table 4 28 Sequential Access Device LOG SENSE Page Parameters Field Descriptions Field Name Description Parameter Code DU DS TSD ETC TMC LP Parameter Length Parameter Value Parameter codes supported for the Sequential Access Device Page are as follows Code Description 0000h Host Write Byte Count This is the number of data bytes received from application clients during WRITE command operations 0001h Tape Write Byte Count The number of
263. rk on the EOM or EOP side A value of 0 causes no change in logical position A negative value n two s complement notation causes reverse movement over n Blocks or Filemarks The drive logically positions the tape on the BOM or BOP side of the nth Block or Filemark When spacing to End of Data EOD the drive ignores the Count field Forward movement occurs until the drive encounters EOD The position is such that a subsequent WRITE command appends data after the last object that the drive has written to tape before EOD A SPACE command in the form SPACE 7 blocks halts with GOOD status after the nth block or with CHECK CONDITION status on any occurrence of Filemark EOD or BOM BOP A SPACE command in the form SPACE n Filemarks halts on the nth Filemark with GOOD status or with CHECK CONDITION status on any occurrence of EOD or BOM BOP Depending on the size of blocks read ahead data in the buffer allows some spacing requests to be satisfied without actual tape movement 4 240 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 34 TEST UNIT READY Command 00h The TEST UNIT READY command checks the SDLT tape drive to ensure that it is ready for commands involving tape movement ee 2 6 5 4 3 2 1 0 0 Operation Code 00h 1 Reserved 2 4 Reserved 5 Control Figure 4 130 TEST UNIT READY Command Descriptor Block Data
264. rrors that the drive detects in relation to the CDB The Request Sense Data is set to Sense Key of ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN CDB The conditions that constitute errors are e PCR bit is set to 1 and Parameter List Length field is not set to 0 e Both the PCR and SP bits are set to 1 A Parameter List Length that would cause a parameter within a valid page to be truncated or otherwise incompletely initialized 47 2 Operation of LOG SELECT The LOG SELECT command allows the initiator to modify and initialize parameters within the logs the drive supports The two ways to initialize the log parameters are 1 Set the PCR bit to 1 in the LOG SELECT CDB this clears all parameters 2 Specify the log page and parameter values as the log parameters to clear individual pages The following pages can be cleared using this method Table 4 19 LOG SELECT Page clearing Codes Page Code Page Description 02h Write Error Count Page 03h Read Error Count Page 32h Compression Ratio Page If an initiator sends multiple pages during the DATA OUT phase it must send them in ascending order according to page code Otherwise the drive terminates the command with a CHECK CONDITION status Sense Key set to ILLEGAL REQUEST and Additional Sense Code set to INVALID FIELD IN PARAMETER LIST The drive returns the same status 1f an unsupported page code appears in any header or if the specified page cannot be
265. rts Table 3 3 SDLT Tape Drive Supported Messages Message and Code Direction ABORT TASK SET 06h Out TARGET RESET 0Ch Out TASK COMPLETE 00h In DISCONNECT 04h In Out IDENTIFY 80h FFh In Out IGNORE WIDE RESIDUE 23h In INITIATOR DETECTED ERROR 05h Out LOGICAL UNIT RESET 17h Out MESSAGE PARITY ERROR 09h Out MESSAGE REJECT 07h In Out 81 81200 02 REV A01 January 2005 3 3 Supported SCSI Messages SDLT 600 SCSI Interface Guide mu T Table 3 3 SDLT Tape Drive Supported Messages Continued Message and Code Direction NO OPERATION 08h Out PARALLEL PROTOCOL REQUEST extended In Out message 04h RESTORE POINTERS 03h In SAVE DATA POINTER 02h In SYNCHRONOUS DATA TRANSFER REQUEST In Out extended message 01h WIDE DATA TRANSFER REQUEST extended In Out message 03h ABORT TASK SET 06h The initiator sends this message to the SDLT tape drive to clear the current I O process on the selected logical unit Buffered cached write operations are completed if possible The drive goes directly to the BUS FREE phase after successful receipt of this message Current settings of MODE SELECT parameters and reservations are not affected Commands data and status for other initiators are not affected An initiator may send this message to a logical unit that is not currently performing an operation for the initiator If the initiator does not select a logical unit the drive enters the BUS FREE pha
266. s 01h if the LUN is Oh 8h if the LUN selects an attached loader or 1Fh if no device is attached to the selected LUN Removable Medium Bit Always set to 1 The drive supports ANSI SCSI 3 per SPC 2 Normal ACA Supported When set to 0 indicates that the drive does not support setting the NACA bit to 1 in the Control byte of the CDB When set to 1 indicates that the drive supports setting the NACA bit to 1 Hierarchical Support When set to 0 indicates that the drive does not support the hierarchical addressing model to assign LUNs to logical units When set to 1 indicates that the drive does support the hierarchical addressing model to assign LUNs to logical units This Standard Inquiry Data is in the format described in the Version field The drive uses this field to indicate the number of additional bytes of INQUIRY Response Data available The value depends on the number of version descriptors returned in the INQUIRY Response Data SCC Supported The drive does not contain an embedded storage array controller component Always set to 0 Access Controls Coordinator The drive does not contain an access controls coordinator Always set to 0 Asymmetric Logical Unit Access Not supported Always set to 0 Third party Copy Not supported Always set to 0 Tagged Basic Command Queuing Not supported Always set to 0 Enclosure Services The drive does not contain an embedded enclosure services component Always set to
267. s in a reservation conflict The initiator that holds the persistent reservation can reserve the logical unit extents or elements as long as the persistent reservations do not conflict with any reservations already known to the drive READS Shared any application client on any initiator may execute commands that perform transfers from the drive to the host WRITES Exclusive any command from an initiator that has not previously performed a Register service action with the drive that attempts a transfer to the drive results in a reservation conflict ADDITIONAL RESERVATIONS Allowed any initiator may reserve the logical unit extents or elements as long as the persistent reservations to not conflict with any reservations already known to the drive READS Exclusive any command from an initiator that has not previously performed a Register service action with the drive that attempts a transfer from the drive results in a reservation conflict WRITES Exclusive any command from an initiator that has not previously performed a Register service action with the drive that attempts a transfer to the drive results in a reservation conflict ADDITIONAL RESERVATIONS Allowed any initiator may reserve the logical unit extents or elements as long as the persistent reservations to not conflict with any reservations already known to the drive Not applicable 81 81200 02 REV A01 January 2005 4 141 PERSISTENT RESERVE OUT Command
268. s increments that the drive waits with a partially full buffer before forcing the data to tape The buffer Full Empty ratio which is dynamic can cause data to be written sooner than the Write Delay Time would indicate The Write Delay Time defaults to 100 64h This causes the drive to flush the buffer in 10 seconds The maximum value is 6500 1964h the minimum value is 15 OFh representing a range from 11 minutes to 1 5 seconds A value of 0 disables forcing data to tape based on time in the buffer The drive rounds values greater than 6500 down to 6500 Data Buffer Recovery Not supported Must be set to 0 Block Identifiers Supported This bit is supported and must be set to 1 Report Setmark Not supported Must be set to 0 Automatic Velocity Control Not supported Must be set to 0 Stop on Consecutive Filemarks Not supported Must be set to 0 Recover Buffer Order Not supported Must be set to 0 81 81200 02 REV A01 January 2005 MODE SELECT 6 10 Command 15h 55h SDLT 600 SCSI Interface Guide Table 4 51 Device Configuration MODE SELECT Page Field Descriptions Continued Field Name Description REW Report Early Warning Not supported Must be set to 0 do not report Early Warning EOM on READ Gap Size Not used Must be set to 0 EOD Defined End of Data Defined Must be set to Oh EEG Enable End of Data Generation Indicates that the drive generates an EOD mark before any change of d
269. s the format of the data in the Attribute Value field see Table 4 96 Attribute Specifies the length in bytes of the Attribute Value field Length Attribute Contains the current READ ATTRIBUTE or desired WRITE ATTRIBUTE Value value of the attribute Table 4 96 EMAM Attribute Formats Format Name Description 00b BINARY The Attribute Value field contains binary data 01b ASCII The Attribute Value field contains only graphic codes that is byte code values 20h through 7Eh and is left aligned placing any unused bytes at the highest offset in the field The field contains 20h the ASCII space character in any unused bytes 10b TEXT The Attribute Value field contains text data 11b Reserved 4 164 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Attribute Identifier Values The values in the Attribute Identifier field see Attribute Format on page 4 163 are assigned according to the attribute type and whether the attribute is standard or vendor unique see Table 4 97 Table 4 97 EMAM Attribute Identifier Range Assignments Attribute Identifiers Attribute Type Subtype 0000h 03FFh 0400h 07FFh 0800h OBFFh 0CO00h OFFFh 1000h 13FFh 1400h 17FFh 1800h FFFFh Device Standard Medium Standard Host Standard Device Vendor Unique Medium Vendor Unique Host Vendor Unique Reserved Only parameters with an Attribute Type of Host can be writt
270. s to SCSI bus selections and returns appropriate normal responses The drive returns tape motion commands with CHECK CONDITION status Sense Key set to NOT READY until the tape medium is ready The drive rewinds the tape to Beginning of Tape BOT The drive goes through a calibration process at power on and loading of media The drive recognizes multiple successive SCSI bus resets and SCSI bus resets of arbitrarily long duration The drive recovers within the time limits specified above following the last SCSI bus reset 81 81200 02 REV A01 January 2005 4 7 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 1 5 Data Cache and Tape Write Interaction 4 2 The Quantum SDLT tape drive contains a data cache that buffers blocks and filemarks until it writes them to tape This section describes what happens when the drive writes or flushes those blocks to tape A MODE SELECT parameter allows the data cache to be disabled unbuffered mode In this mode every WRITE command causes data to be written to the tape medium before the drive returns the STATUS byte and the TASK COMPLETE message to the host NOTE Unbuffered mode is NOT recommended due to the poor performance that may result The drive writes the contents of the write data cache to the tape medium under the following circumstances e When the initiator issues a WRITE FILEMARKS command with the Immediate bit set to 0 e When data has been in the cache longer t
271. sconnects are user configurable using the Disconnect Reconnect Page of the MODE SELECT command e The SDLT tape drive does not act as an initiator on the SCSI bus Therefore the drive does not 1 generate unsolicited interrupts to the bus 2 initiate its own SCSI commands or 3 assert bus reset The SDLT 600 SCSI drive supports both LVD and single ended bus configurations SCSI Bus Conditions The SCSI bus has two asynchronous conditions e Attention Condition e Reset Condition Attention Condition The Attention Condition informs an SDLT tape drive that an initiator has a message ready The drive gets the message by performing a MESSAGE OUT phase The Attention Condition requires the following timing e The initiator creates the Attention Condition by asserting ATN at any time except during the ARBITRATION or BUS FREE phases e The initiator negates the ATN signal at least two deskew delays before asserting the ACK signal while transferring the last byte of the message 2 2 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 2 SCSI Parallel Protocol e Ifan initiator wishes to send a message before transitioning to a new bus phase the initiator asserts the ATN signal then waits at least two deskew delays before negating the ACK signal for the last byte transferred in the current bus phase Asserting the ATN signal later may not be honored until a later bus phase which may result in an unexpect
272. scriptor is non zero or The drive does not report CHECK CONDITION status if the only error is the underlength condition or if the only error is the overlength condition and the Block Length field of the mode parameters block descriptor is set to 0 Specifies whether the drive is to transfer fixed length or variable length blocks and gives meaning to the Transfer Length field of the READ command When set to 0 requests variable block mode A single block is transferred with the Transfer Length specifying the maximum number of bytes the initiator has allocated for the returned data When set to 1 requests fixed block mode When set to 1 specifies the number of blocks to be transferred to the initiator This setting is valid only if the drive is currently operating in fixed block mode When set to 0 no data is transferred and the current position on the drive does not change This is not an error condition A successful READ operation with the Fixed bit set to 1 transfers x byes of data where x current block length x of blocks x block size bytes of data to the initiator Upon termination of the READ command the drive logically positions the medium after the last block of data transferred EOM side 4 14 1 Filemark and End of Data Handling If the drive reads a Filemark it returns a CHECK CONDITION status Within the Sense Data the Filemark and Valid bits are set to 1 and the Sense Key field is set to NO SENSE The informati
273. se and no commands data or status on the drive are affected If a WRITE command is in progress and STATUS has not been sent to the initiator when the drive receives this message the drive may write some or all of the data for the WRITE command to the medium 3 4 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 3 SCSI Messages 3 2 2 dus 3 3 2 4 TARGET RESET OCh An initiator sends the TARGET RESET message to direct the SDLT tape drive to clear all I O processes This message causes the drive to 1 Flush the contents of the cache to tape and go to the BUS FREE phase 2 Execute a soft reset leaving the drive as if a Bus Reset had occurred The drive creates a Unit Attention condition for all initiators after accepting and processing a TARGET RESET message The additional sense code is set to TARGET RESET OCCURRED Ifa WRITE command is in progress and STATUS has not been sent to the initiator when the drive receives this message the drive may write some or all of the data for the WRITE command to the medium TASK COMPLETE 00h The SDLT tape drive sends the TASK COMPLETE message to an initiator to indicate that an I O process has completed and that the drive sent VALID STATUS to the initiator After successfully sending this message the drive enters the BUS FREE phase by releasing the BSY signal The drive considers the message transmission successful when it detects the negation of ACK
274. shows the format of the Vendor unique Logical Unit Identifier Bit Byte 7 6 5 4 3 2 1 0 0 Protocol Identifier Code Set 2h 1 PIV 0 Rsv d Association 0 Identifier Type 1 2 Reserved 3 Identifier Length MSB 4 11 Vendor Identification LSB MSB 12 27 Product Identification LSB MSB 28 n Serial Number LSB Figure 4 8 Vendor unique Logical Unit Identifier Data Format Table 4 12 Vendor unique Logical Unit Identifier Field Descriptions Field Name Description Protocol Set to 0 Identifier Code Set Indicates the type of data found in the Identifier field Set to 2h indicating ASCII graphic code values 20h through 7Eh data PIV Protocol Identifier Valid Set to 0 indicating that the value returned in the Protocol Identifier field should be ignored Association Set to 0 indicating that the Identifier is associated with the logical unit Identifier Type Type of identifier Value Description lh T10 vendor identification 4 22 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 12 Vendor unique Logical Unit Identifier Field Descriptions Continued Field Name Description Identifier Specifies the length in bytes of the Identifier field If the Allocation Length Length field of the CDB is too small to transfer the entire identifier the Identifier Length value is not adjuste
275. signable to specific 9087h channels Read only Raw sub block read errors by channel Note Many of these errors are write not read errors and are not to be included in read error rate calculations If these errors are used to try to identify bad channels the bad channel may be on either the writing or reading drive Note Parameter codes 00h 01h and 04h always return a value of 0 DU Disable Update When set to 0 indicates that the drive updates all log parameter values When set to 1 indicates that the drive does not update the log parameter values except in response to a LOG SELECT command The drive sets this bit to 1 when accumulated values reach maximum The drive also returns this bit set to 1 if the host set the bit in the last LOG SELECT command Default is 0 Note that for parameter types other than threshold and cumulative values this bit is always set to 0 DS Disable Save Not supported Always set to 1 TSD Target Save Disable Not supported Always set to 1 ETC Enable Threshold Comparison When set to 1 indicates that the drive performs comparison to threshold When set to 0 indicates that the drive does not perform the comparison The Control Mode Page of the MODE SELECT command sets this bit set to 1 Default is 0 81 81200 02 REV A01 January 2005 4 45 LOG SENSE Command 4Dh SDLT 600 SCSI Interface Guide Table 4 24 Log Parameters for Read Write Error LOG SENSE Page Field Descriptions C
276. status The Sense Key is set to MEDIUM ERROR and the Additional Sense Code is set to AUXILIARY MEMORY READ ERROR 81 81200 02 REV A01 January 2005 4 157 READ ATTRIBUTE Command 8Ch SDLT 600 SCSI Interface Guide 4 15 2 READ ATTRIBUTE Service Action Codes The service actions defined for the READ ATTRIBUTE command are listed in Table 4 90 Table 4 90 READ ATTRIBUTE Command Service Action Codes Code Name Description Details 00h ATTRIBUTE Returns attribute values Page 4 159 VALUES Olh ATTRIBUTE LIST Returns a list of available attribute Page 4 160 identifiers 02h VOLUME LIST Returns a list of known volume Page 4 161 numbers 03h PARTITION LIST Returns a list of known partition Page 4 162 numbers 04h Restricted 05h 1Fh Reserved NOTE The format of the parameter data the READ ATTRIBUTE command returns depends on the service action the command specified 4 158 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands ATTRIBUTE VALUES Service Action The READ ATTRIBUTE command with the ATTRIBUTE VALUES service action returns parameter data containing the attributes specified by the Partition Number Volume Number and First Attribute Identifier fields in the CDB The returned parameter data contains the requested attributes in ascending numerical order by attribute identifier value using the format shown in Figure 4 85 Bit Byte 7 6 5
277. status until the selected operation has completed If set to 1 the drive returns status as soon as it initiates the operation Long Must be set to to perform an erase operation Issuing an ERASE command when the tape is not at BOT is an ILLEGAL REQUEST If set to 0 the drive performs no operation the ERASE command does not affect the tape 4 10 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 4 INQUIRY Command 12h The INQUIRY command allows the initiator to direct all attached devices to return information about themselves SDLT devices respond by providing a variety of information including their World Wide Name and other important characteristics The SDLT tape drive identifies itself as a Sequential Access Storage Device that implements the SCSI 3 protocol NOTE The tape drive does not need to access its tape medium to respond to the INQUIRY command The drive can provide different categories of data in response to an INQUIRY command e Standard Inquiry Data contains basic data about the drive including vendor specific inquiry data that precisely identifies the revision of SDLT tape drive subsystem components e Vital Product Data comprises several pages of additional data Each Vital Product Data page requires a separate INQUIRY command from the initiator To see a list of specific Vital Product Data pages returned by this SDLT tape drive refer to Supported
278. stem Components Revision Page Field Descriptions Field Name Description Product Family Released Firmware Version Number Fields Firmware Personality Firmware Subpersonality Vendor Specific Subtype Media Loader Present Flag Library Present Flag Module Revision Unit Serial Number Indicates the data density of each of the SDLT tape drives as follows Value Drive Density Ah 110 0 220 0 GB Bh 160 0 320 0 GB Ch 300 0 600 0 GB Differentiates between released and test versions of firmware When set to 1 indicates released code Vxxx when set to 0 indicates field test code Txxx Released code has no minor firmware version number byte 38 is set to 0 For tracking purposes field test and engineering versions of code have non zero minor firmware version numbers These fields display the various version numbers in binary format instead of ASCII Numeric indicator of firmware personality Note that when set to 4 indicates OEM family Indicates the variant of the firmware personality Always set to 1 indicating the primary firmware personality variant Product identification When set to 0 indicates no loader present Non zero indicates loader is present When set to 0 indicates no library present Non zero indicates library is present A 4 byte ASCII string representing the revision level of the tape drive s module the controller PCBA attached to the drive The drive s s
279. stered you can download a variety of useful drivers software programs and diagnostic utilities For personalized information about Quantum s reliable data protection products call 1 800 624 5545 in the U S A and Canada 81 81200 02 REV A01 January 2005 1 3 Reader Comments SDLT 600 SCSI Interface Guide 1 7 Reader Comments Quantum is committed to providing the best products and service We encourage your comments suggestions and corrections for this manual Please send all comments on existing documentation to Quantum Technical Publications 4001 Discovery Dr Suite 1100 Boulder Colorado USA 80303 or if you prefer e mail your comments to doc comments quantum com 1 4 January 2005 81 81200 02 REV A01 CHAPTER 2 5 SCSI Parallel Protocol This chapter covers the following topics e Background Information About SCSI describes the knowledge required to use this manual successfully e Information Transfer Phases describes the specifics of information transfer in SDLT tape drives e SCSI Bus Conditions describes the two asynchronous conditions of the SCSI bus 2 1 Background Information About SCSI Small Computer System Interface SCSI is one of the industry s most widely adopted I O interfaces it is widely used in computing platforms from personal computers to mainframes to peripheral devices of all types SDLT tape drives conform to the SPI 3 standard You should familiarize yourself wi
280. strate and describe the data fields of Read Key data parameters Bit Byte 7 5 4 3 2 1 0 MSB 0 3 PRGeneration LSB MSB 4 7 Additional Length n 7 LSB Reservation Key List Follows in Bytes 8 n MSB 8 15 First Reservation Key LSB n 7 MSB to Last Reservation Key ik LSB Figure 4 77 PERSISTENT RESERVE IN Read Keys Parameters Data Format 81 81200 02 REV A01 January 2005 4 137 PERSISTENT RESERVE IN Command 5Eh SDLT 600 SCSI Interface Guide Table 4 78 Read Keys Parameters Field Descriptions Field Name Description PRGeneration Additional Length Reservation Keys Persistent Reservations Generation The value in this field is a 32 bit counter in the drive that is incremented each time a PERSISTENT RESERVE OUT command requests a Register Clear Pre empt or Pre empt amp Clear operation Note that PERSISTENT RESERVE IN commands do not increment the counter nor do PERSISTENT RESERVE OUT commands that perform a Reserve or Release service action or that are not performed due to an error or a reservation conflict The value in the Generation field is set to 0 as part of the power on self test process The value in the Generation field allows the application client that examines the value to verify that another application client has not modified the configuration of the initiators attached to a logical unit without notifying
281. sts a Register Clear Pre empt or Pre empt amp Clear operation Note that PERSISTENT RESERVE IN commands do not increment the counter nor do PERSISTENT RESERVE OUT commands that perform a Reserve or Release service action or that are not performed due to an error or a reservation conflict The value in the Generation field is set to 0 as part of the power on self test process The value in the Generation field allows the application client that examines the value to verify that another application client has not modified the configuration of the initiators attached to a logical unit without notifying the application client doing the examination Contains the count of the number of bytes that are in the Read Reservation descriptors bytes 8 n Note that this field contains the number of bytes regardless of the value prescribed by the Allocation Length field in the command s CDB The drive reports one Reservation descriptor for each unique persistent reservation on the logical unit when the PERSISTENT RESERVE IN command has indicated a Read Reservations action Figure 4 79 on page 4 140 and Table 4 80 on page 4 140 contain details about the contents of each Reservation Descriptors field The figure and table below illustrate and describe the data fields of each Read Reservations descriptor s data fields Bc 6 5 4 3 2 1 0 MSB 0 7 Reservation Key LSB MSB 8 11 Scope Specif
282. t there is no header in the data passed to the drive The drive detects any potential buffer overruns and rejects the WRITE BUFFER command 4 250 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 38 3 Download Microcode Mode 04h This mode uses buffer offsets to download the firmware image into the drive s buffer in parts The firmware image must be downloaded in integral whole multiples of 8 KB These commands do not cause the new image to become active A Download Microcode and Save Mode WRITE BUFFER command must be issued for the image to become active The drive must not contain any tape medium before starting an image download This is to safeguard against accidentally starting a firmware update If a tape cartridge is loaded when all or part of a firmware image has been downloaded the drive rejects another WRITE BUFFER command with Download Microcode mode An error on a WRITE BUFFER command causes the drive to discard any downloaded image data The download must be restarted from the beginning 4 38 4 Download Microcode and Save Mode 05h This mode downloads and saves the entire image at once or downloads the image and saves it or starts a save operation after the image data has been downloaded using the Download Microcode mode 04h described above This mode of the WRITE BUFFER command causes the drive to verify the image data and update the Flash EEPROM firmware area During
283. t to 0 Always set to 0 When set to 0 indicates there is no limit on the amount of data transferred per data transfer operation Enable Modify Data Pointers Always set to 0 Not supported Always set to 0 Disconnect Immediate Not supported Always set to 0 Data Transfer Disconnect Control Not supported Always set to 0 81 81200 02 REV A01 January 2005 4 117 MODE SENSE 6 10 Command 1Ah 5Ah SDLT 600 SCSI Interface Guide Control Mode Page 0Ah The Control Mode Page allows the initiator to determine whether the drive returns a CHECK CONDITION status when one of the WRITE and READ counters has reached a specified threshold bie 0 PS 0 SPF 0 Page Code 0Ah 1 Page Length 0Ah 2 TST Reserved D Sense GLTSD RLEC 3 Queue Algorithm Modifier 0 Rsv d QErr 0 DQue 0 TAS RAC UA Intlck Ctrl SWP Obsolete 5 Reserved Autoload Mode 6 7 Obsolete MSB 8 9 Busy Timeout Period LSB MSB 10 11 Extended Self test Completion Time LSB Figure 4 66 Control Mode MODE SENSE Page Data Format Table 4 67 Control Mode MODE SENSE Page Field Descriptions Field Name Description PS Parameters Savable Not supported Always set to 0 SPF SubPage Format Always set to 0 Indicates that the drive uses the page 0 page format Page Code Identifies the type of MODE SENSE page being transferred A value of 0Ah identifies this as the Contr
284. ta in the write buffer to the tape medium and appends an End of Data marker WA i 7 6 5 4 3 2 1 0 0 Operation Code 01h 1 Reserved Immed 2 4 Reserved 5 Control Figure 4 125 REWIND Command Descriptor Block Data Format Table 4 134 REWIND Command Data Field Description Field Name Description Immed Immediate When set to 1 the drive first writes any remaining buffered data to the tape medium and adds an EOD marker It then returns status to the host before beginning the actual rewind operation When set to 0 the drive returns status after the rewind has completed 4 232 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 31 SEND DIAGNOSTIC Command 1Dh The SEND DIAGNOSTIC command directs the SDLT tape drive to perform its self diagnostic tests Two levels of drive resident diagnostic tests are available the Level 1 Electronics Test and the Level 2 Write Read Functionality Test Bit Byte 7 6 5 4 3 2 1 0 0 Operation Code 1Dh 1 Self Test Code PF 0 Rsv d Selftst DevOfl UnitOfl 2 Reserved MSB 3 4 Parameter List Length LSB 5 Control Figure 4 126 SEND DIAGNOSTIC Command Descriptor Block Data Format Table 4 135 SEND DIAGNOSTIC Command Data Field Descriptions Field Name Description Self Test Self Test Code Used to perform drive and medic
285. te state such as e After any SCSI reset condition e After a TARGET RESET message e After a power cycle e After a WIDE DATA TRANSFER REQUEST message exchange The SYNCHRONOUS DATA TRANSFER REQUEST message exchange establishes an agreement between two SCSI devices on the clocking of the data used for DATA phase transfer between them 3 12 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 3 SCSI Messages This agreement applies to the DATA IN and DATA OUT phases only All other information transfer phases must use asynchronous transfers The SDLT tape drive implements both the wide data transfer and synchronous data transfer options If both wide and synchronous data transfers are used the wide data transfer agreement must be negotiated first If a synchronous data transfer agreement is in effect the drive resets the synchronous agreement to asynchronous mode after accepting a WIDE DATA TRANSFER REQUEST message If the Transfer Period requested is less than the minimum value the drive supports the drive adjusts the return value up to the minimum supported value Not all possible transfer periods between the minimum and maximum values are supported If the Transfer Period requested is between the minimum and maximum supported values but not exactly achievable by the drive the drive returns the request value and the drive transmits data at the next lower speed it is capable of The initiator may send data
286. th the SCSI 3 SAM 2 SPC 2 SPI 3 and SSC standards before using the remaining portions of this manual Important features of SPI 3 implementation include the following e Efficient peer to peer I O bus for up to 15 devices e Asynchronous transfer rates that depend only on device implementation and cable length e Logical addressing rather than physical addressing for all data blocks Multiple initiators and multiple targets e Distributed arbitration bus contention logic e Command set enhancement NOTE Complete SCSI standards documents are available at www t10 org 81 81200 02 REV A01 January 2005 2 1 Information Transfer Phases SDLT 600 SCSI Interface Guide 2 2 2 3 PR Ai Information Transfer Phases The COMMAND DATA STATUS and MESSAGE phases are known as the information transfer phases because they are used to transfer data or control information Keep the following guidelines in mind e SDLT tape drives support wide asynchronous and synchronous data transfers e Odd parity is generated during all information transfer phases during which the device writes data to the SCSI bus and parity is checked during all transfer phases in which data is read from the bus by the SDLT tape drive e SDLT tape drives support block sizes from 4 bytes to 16 777 212 bytes e The tape drive disconnects from the SCSI bus at regular intervals during information transfer phases to allow other devices to access the bus These di
287. the Command Descriptor Block The drive does not switch to MESSAGE OUT until the current DMA completes The drive ignores the ATTENTION request while the current data transfer completes that is the drive does not switch to MESSAGE OUT until after the current DMA completes The drive returns a MESSAGE REJECT message and responds with CHECK CONDITION status indicating the command aborted because of an invalid message The drive sends a MESSAGE REJECT message then sends TASK COMPLETE The drive sends a MESSAGE REJECT message and enters the BUS FREE phase 3 2 5 IDENTIFY 80h FFh Either the initiator or the SDLT tape drive sends the IDENTIFY message to establish or re establish the physical connection path between an initiator and drive for a particular logical unit under the conditions listed below Figure 3 2 shows the format of the IDENTIFY message and Table 3 5 describes the data field contents Bit 7 6 5 4 3 2 1 Identify DiscPriv LUN Figure 3 2 IDENTIFY Message Data Format Table 3 5 IDENTIFY Message Field Descriptions Field Description Identify Must be set to 1 indicating that the current message is an IDENTIFY message DiscPriv Disconnect Privilege May be set to 0 provided that no other I O process is currently active in the drive If this bit is not set to 1 and other I O processes are currently active in the drive the drive returns a BUSY status LUN Logical Unit Number
288. the actual number bytes written using the WRITE BUFFER command Following the READ BUFFER header the drive transfers data from its data buffer 4 186 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands 4 17 3 Data Mode 02h In this mode the DATA IN phase contains only buffer data This mode can be used to check the diagnostic read buffer to see if an unexpected error has occurred 4 17 4 Descriptor Mode 03h In this mode the drive returns a maximum of 4 bytes of READ BUFFER descriptor information The drive returns the descriptor information for the buffer specified by the Buffer ID In this mode the drive does not reject the invalid Buffer IDs with a CHECK CONDITION status but returns all zeros in the READ BUFFER descriptor The Offset Boundary is 3 indicating that buffer offsets should be integral multiples of 8 Bit Byte 7 6 5 4 3 2 1 0 0 Offset Boundaries 0Ch MSB 1 3 Buffer Capacity LSB Figure 4 97 READ BUFFER Descriptor Data Format 4 17 5 Read Data from Echo Buffer OAh In this mode the drive transfers data to the application client from the Echo Buffer The Echo Buffer transfers the same data as when the WRITE BUFFER command with the mode field set to Echo Buffer was issued The Buffer ID and Buffer Offset fields are ignored in this mode The READ BUFFER command returns the same number of bytes of data as the drive
289. the drive returns density support data blocks for the densities supported by the mounted medium only Allocation Specifies the maximum number of data bytes that the drive is allowed to return Length The REPORT DENSITY SUPPORT command returns a header followed by one or more density support data blocks The data blocks are presented in ascending numerical order of the primary density code value 81 81200 02 REV A01 January 2005 4 199 REPORT DENSITY SUPPORT Command 44h SDLT 600 SCSI Interface Guide The following figure illustrates the REPORT DENSITY SUPPORT header Bit Byte 7 6 5 4 3 2 1 0 MSB 0 1 Available Density Support Length LSB 223 Reserved 4 n Density Support Data Block Descriptor Figure 4 108 REPORT DENSITY SUPPORT Header Data Format The following table provides a description of the Available Density Support Length field The Density Support Data Block Descriptor field has a separate illustration and description table Table 4 117 REPORT DENSITY SUPPORT Header Field Descriptions Field Name Description Available Density Specifies the number of bytes in the data that follows that are available to Support Length be transferred Note that the length value does not include the length of the field itself The value in this field is an integer multiple of 52 plus two the length in bytes of a density support data block descriptor Density Support F
290. the reprogramming of the Flash EEPROM the Write Protect and Drive Status LEDs on the drive s front panel blink Also while it is updating the EEPROM the drive disconnects from the network SCSI bus and does not respond until the update is complete When the Save operation completes successfully the firmware restarts itself causing the power on self test POST to run At that point the drive generates two UNIT ATTENTION conditions POWER UP RESET and OPERATING CODE HAS CHANGED CAUTION fany type of power failure occurs during the actual reprogramming of the FLASH EEPROM or if the reprogramming fails before completion the drive subsystem becomes unusable and the drive must be replaced 4 38 5 Write Data to Echo Buffer Mode 0Ah In this mode the drive transfers data from the application client and stores it in an Echo Buffer The drive ignores the Buffer ID and Buffer Offset fields in this mode Once a WRITE BUFFER command completes successfully the data is preserved in the Echo Buffer unless there is an intervening command to write to the Echo Buffer or unless the drive is reset by any means 81 81200 02 REV A01 January 2005 4 251 WRITE FILEMARKS Command 10h SDLT 600 SCSI Interface Guide 4 39 WRITE FILEMARKS Command 10h The WRITE FILEMARKS command directs the SDLT tape drive to write the specified number of Filemarks onto the tape beginning at the current logical position If the Immed bit is
291. tiator does not result in an error Instead the drive returns a GOOD status without altering any other reservation the Release service action does not change the Reservation Key The drive returns a CHECK CONDITION status for any PERSISTENT RESERVE OUT command that specifies the release of a persistent reservation held by the requesting initiator that does not match the Scope and Type The Sense Key is set to ILLEGAL REQUEST and the Additional Sense Code is set to INVALID RELEASE OF ACTIVE PERSISTENT RESERVATION Attempts to release persistent reservations in which none of the Scope Type Reservation Key and extent values match an existing persistent reservation held by the initiator making the request are not errors An active persistent reservation may also be released by either of the following Powering off When the most recent APTPL value received by the drive is 0 a power off performs a hard reset clears all persistent reservations and removes all registered Reservation Keys e Executing a PERSISTENT RESERVE OUT command from another initiator with a persistent reserve service action of Clear Pre empt or Pre empt amp Clear Do not perform a Release service action if any operations interlocked by the persistent reservation have not yet completed A PERSISTENT RESERVE OUT command with a successful Clear service action removes all persistent reservations for all initiators All Reservation Keys are also removed Any commands
292. ting any non supported value causes the drive to terminate the command with a CHECK CONDITION status and Sense Key set to ILLEGAL REQUEST Mode Description 00h Combined Header and Data Mode see page 4 186 02h Data Mode see page 4 187 03h Descriptor Mode see page 4 187 0Ah Read Data from Echo Buffer see page 4 187 OBh Echo Buffer Descriptor Mode see page 4 188 Buffer ID Indicates from which buffer the data is to be transferred Possible values are Buffer Description 00h This 2 200 KB buffer is used with the WRITE BUFFER command to provide a diagnostic capability for testing the SCSI bus hardware integrity or both Olh This buffer is used to read the drive s SCSI RAM and EEPROM Its effective size is 30200h bytes 02h This buffer is used to read the drive s data cache RAM The Available Length field returned in Combined Header and Data mode and the Buffer Capacity field returned in Descriptor mode are not large enough to express the size of the data cache RAM so both fields return to 0 03h This buffer is used to read the DMARK table Alh This buffer provides access to diagnostic information saved from an earlier event Saved Buffer A2h This buffer provides real time access to diagnostic information Live Buffer Note In Data mode or Combined Header and Data mode any other value besides those listed is illegal In Descriptor mode any other value returns all zeros in the descriptor In Read Data from Echo Buf
293. tion has stopped 4 Media Critical Your data is at risk Copy all important data from this data cartridge Do not use the data cartridge again Restart the operation using a different data cartridge 5 Read Failure Critical The data cartridge or the tape drive is damaged Contact a service representative 6 Write Failure Critical The tape medium is faulty or the drive is damaged Test the drive using a known good data cartridge If the problem persists contact a service representative 7 Media Life Warning The data cartridge has reached the end of its useful life Copy all important data to another data cartridge and discard the old data cartridge 9 Write Protect Critical The data cartridge is write protected Set the write protection switch to enable writing or use a different data cartridge 10 No Removal Informational The drive is busy and the data cartridge cannot be ejected Wait for the operation to complete before attempting to eject the data cartridge 11 Cleaning Informational The data cartridge in the drive is a cleaning cartridge Media For normal drive data related operations replace the cleaning cartridge with a data cartridge 17 Read Only Warning The type of tape currently loaded into the drive is Read Format Only on the SDLT tape drive 19 Nearing Media Warning The data cartridge is nearing the end of its useful life Life You should use another data cartridge for your next backup Store this data cartridge in a safe
294. tly loaded cartridge 0007h Controller serial number least significant 16 bits The drive uses this value to generate the Media ID for blank tape cartridges 0008h Drive cleaning cycle count 0009h Serial number of the first drive to write the current tape 000Ah Serial number of the last drive to write the current tape Disable Update Always set to 0 Disable Save Not supported Always set to 1 Target Save Disable Not supported Always set to 1 Enable Threshold Comparison Not supported Always set to 0 Threshold Met Criteria Always set to 0 List Binary Not used List Parameter The drive treats the parameter codes as data counters Always set to 0 Specifies the number of bytes in the parameter value All parameters are 4 bytes in length Indicates the actual value of this log parameter 81 81200 02 REV A01 January 2005 4 65 LOG SENSE Command 4Dh SDLT 600 SCSI Interface Guide pt 7 6 5 4 3 2 1 0 4 Reserved ClnQ CInR ClnEx MSB T Reserved LSB Figure 4 36 Cleaning Related Log Parameters Format for Device Status LOG SENSE Page Table 4 41 Log Parameters for Device Status LOG SENSE Parameter 0001h Cleaning Related Field Descriptions Field Name Description ClnQ Set to 1 if a cleaning required condition exists When the condition clears the drive also clears this bit CInR Set to 1 if a cleaning request condition exists When the conditio
295. to 0 indicating that the value returned in the Protocol Identifier field should be ignored Association Set to 0 indicating that the Identifier is associated with the logical unit Identifier Type Type of identifier Value Description 3h NAA identifier Identifier Specifies the length in bytes of the Identifier field If the Allocation Length Length field of the CDB is too small to transfer the entire identifier the Identifier Length value is not adjusted to reflect the truncation NAA Identifier Contains the Name Address Authority NAA identifier for the logical unit 4 24 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Firmware Build Information Page COh Figure 4 11 shows the format of the Firmware Build Information page the drive returns ict 7 6 5 4 3 2 1 0 0 Peripheral Qualifier Peripheral Device Type 1 Page Code COh 2 Reserved 3 Page Length 28h 4 7 Servo Firmware Revision 8 11 Servo Firmware Checksum 12 15 Servo EEPROM Checksum 16 19 Controller Firmware Checksum 20 43 Controller Firmware Build Date Figure 4 10 Firmware Build Information Page Data Format Table 4 14 Firmware Build Information Page Field Descriptions Field Name Description Servo Firmware Contains the revision number of the servo firmware Revision Checksum The Servo Firmware Servo EEPROM and READ WRIT
296. to be transferred between the initiator and the SDLT tape drive The content and characteristics of this data are command dependent Table 4 4 lists the information transmitted with each of the commands The drive uses the Length in CDB column of Table 4 4 to determine how much command related data are to be transferred Table 4 3 lists how the units bytes or logical blocks for the different Length fields are implied by the Length field name as follows Table 4 3 Units for Length Fields Field Name Units Implied Allocation Length Bytes of data the drive is allowed to send to the initiator Parameter List Length Bytes of data the initiator has available for the drive Transfer Length Logical number of data blocks or data bytes the initiator wants transferred or verified Byte Transfer Length Bytes of data the initiator wants transferred The Data Out column in Table 4 4 lists the information the initiator passes to the drive as part of the command The Data In column lists the information the drive sends to the initiator Numbers in 4 4 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands parentheses after an item indicate the item s length in bytes In some cases additional length information is communicated during the DATA phase Table 4 4 DATA Phase Command Contents Command Length in CDB Data Out To Drive Data In From Drive ERASE 0 INQUIRY Allocatio
297. um is not repositioned for access When the Hold bit is set to 0 and the Load bit is set to 1 the medium is positioned for access When both the Hold and Load bits are set to 0 EMAM is not accessible upon completion of the command EOT End of Tape The drive ignores this bit unless both the EOT and Load bits are set to 1 then the drive returns CHECK CONDITION status with Sense Key set to ILLEGAL REQUEST ReTen Retension Ignored Retension operations are not needed 4 28 January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 16 LOAD UNLOAD Command Descriptor Block Field Descriptions Continued Field Name Description Load If the Load bit is set to 1 and the medium is already loaded the drive writes any cached data to the tape rewinds the tape and returns a GOOD status If the drive unloaded the medium but the cartridge was not removed a LOAD UNLOAD command causes the drive to load the tape to Beginning of Partition BOP again and make it ready for use If the Load bit is set to 0 and the medium is loaded the drive writes any buffered data and filemarks to the tape rewinds the tape to BOM and unloads the medium back into the cartridge At that point the drive ejects the medium if not in a library If the drive is in a library the drive does not eject the medium but waits for another command If the medium is already unloaded the drive takes no action The drive
298. urned to the SCSI INQUIRY command complies with the SPC 2 specification When set to 0 the data returned complies with X3 131 1994 SCSI 2 Enables reporting of ASC ASCQ values unique to SCSI 3 The number of seconds until the drive times out waiting for ACK once DMA transfer started When set to 0 the timer is set to infinite The number of reselection retries the drive makes before giving up A reselection retry occurs once each second When set to 0 the drive never gives up it performs infinite reselection retries When set to 1 SCSI RESERVE RELEASE UNIT commands are no operation NOP 0 Best possible speed 5 Limit to 5 MB sec 10 Limit to 10 MB sec 20 Limit to 20 MB sec 40 Limit to 40 MB sec January 2005 81 81200 02 REV A01 SDLT 600 SCSI Interface Guide Chapter 4 SCSI Commands Table 4 58 EEPROM Vendor Specific MODE SELECT Page Parameter Descriptions Data Parameter Name Type Default Usage SetEOMatBOM Binary 0 When set to 1 sets EOM field in byte 2 of REQUEST SENSE data when encountering BOM SetEOMatEW Binary 0 When set to 1 sets EOM field in byte 2 of REQUEST SENSE data when encountering Early Warning End of Media for all operations TaMrieDefault Decimal 3 Default setting for the MRIE field in the TapeAlert Mode Page ThirdPartyDen Decimal 0 Value of default third party density EnaThirdPartyDens must be set to 1 1 Applied to DLT IV format tape fo

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