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Dell PowerVault TL4000 Reference Guide

1. Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved SPF 0 Page Code 1Ch 1 Additional Page Length OAh 2 Perf 0 Reserved Dexcpt Test 0 Reserved LogErr 3 Reserved MRIE 0 4 7 Internal Timer 8 11 Report Count Test Flag Number Chapter 3 Supported SCSI Commands 3 23 Field descriptions Perf When this bit is set to 0 this indicates that informational exception operations that can cause delays are acceptable This bit should be set to zero Dexcpt When this bit is set to zero the reporting method indicated by the MRIE field is used When this bit is set to one this indicates that the media changer shall disable all information exception operations ignoring the MRIE field In this mode the initiator must the poll the Tape Alert log page Currently only MRIE mode 0 is supported so this bit is ignored Test Test modes are not supported this field must be set to zero LogErr When this bit is set to 0 the media changer shall not log any Tape Alert events When this bit is set to 1 the media changer shall log Tape Alert events MRIE With this field the initiator can specify the method used by the media changer to report informational exception conditions Tape Alert events Currently only mode 0 is supported This means that Tape Alert flags can only be read by polling with the LOG SENSE command to the Tape Alert page Interval Timer The media changer does not report Tape Alert c
2. Bit 7 6 5 4 3 2 1 0 Byte 0 Extended Message 01h 1 Extended Message Length 03h 2 Extended Message Code 01h 3 Transfer Period Factor 4 REQ ACK Offset The Transfer Period Factor field indicated the value for the Transfer Period in 4ns counts This value is not used the returned value is 00h The media changer returns OOh for the REQ ACK Offset field indicating that the media changer requires asynchronous data transfer 4 1 The Wide Data Transfer Request message is used to negotiate the width of the data path for the data transfers between the media changer and the initiator The width applies to data phases only The media changer does not support wide data transfers When it receives a WDTR message from the initiator it returns a WDTR message with a transfer width exponent of 0 8 bit transfer width The successful exchange of WDTR message implies an agreement to an 8 bit data transfer width Bit 7 6 5 4 3 2 1 0 Byte 0 Extended Message 01h 1 Extended Message Length 02h 2 Extended Message Code 03h 3 Transfer Width Exponent The Transfer Width field determines the width of the data path for data transfers The media changer will return OOh for this field This indicates that the media changer supports an 8 bit data transfer width only Save Data Pointers The SAVE DATA POINTERS message is issued before every disconnect message following a data in or data out
3. Event type Identifier Cmd Oth Response 02h Event 04h Trace Data 08h Low Level Trace 10h Customer Events 20h Recovered Error 40h Hardware Error 80h Next table describes the possible Source module ID s which may generate events Source module ID of event Identifier Main 0001h Drive 0002h CDB Interpreter 0004h Accessor 0008h Trace 0010h OCP Input 0020h OCP Output 0040h SCSI 0080h 3 14 TL2000 and TL4000 SCSI Reference SDCI 0100h Serial Monitor 0200h TNT Monitor 0400h Debug Monitor 0800h Test 1000h MN Server 2000h Network 4000h RMU 8000h Next table describes the possible Data types of event data Data type of event data Identifier Binary 00h ASCII Oih Tape Alert Log Page 2Eh This page consists of the Page Header followed by 64 Tape Alert flags Each Tape Alert flag stands for a pre determined media changer specific error condition Tape Alert Flags range from 1 until 64 Every tag number has a standardized meaning This page will not be affected by the LOG SELECT command This page can be retrieved by means of a Log Sense command with PC Page Control set either to 00b or 01b Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved Page Code 2Eh 1 Reserved 2 MSB Page Length 0140h 3 LSB 4 64 Tape Alert Flag structures 320 bytes 323 The media changer will suppor
4. Block Descriptor Length If the DBD bit is cleared in the CDB the media changer may return an eight byte Block Descriptor When a Block Descriptor is returned the Block Descriptor Length will report 8 When the DBD bit is set the media changer will not return Block Descriptors and therefore the Block Descriptor Length will report 0 Chapter 3 Supported SCSI Commands 3 31 Parity page 00h By means of the Parity page the host can enable Parity retries and select the maximum number of retries Bit 7 6 5 4 3 2 1 0 Byte 0 PS 1 SPF 0 Page Code 00h 1 Additional Page Length 02h 2 Reserved Parity Reserved 3 Maximum Parity retries Field descriptions PS Parameters Savable This field is set to one The media changer can write this page to non volatile memory Parity This bit indicates whether parity retries are enabled or disabled By factory default parity retries are enabled Maximum Parity retries This field indicates the maximum number of retries performed on a parity error during data out data in and message out phase By factory default the number of parity retries is set to 4 The maximum value allowed in the parity retry field is 7 Control Extension page 0Ah By means of this page the host can retrieve SCSI features provided by the media changer Bit 7 6 5 4 3 2 1 0 Byte 0 PS 0 SPF 1 Page
5. Timestamp parameter data length The Timestamp parameter data length field indicates the number of bytes of parameter data that follow Timestamp Origin The Timestamp origin field indicates the origin of the timestamp Code Description 3 70 TL2000 and TL4000 SCSI Reference 000b Timestamp initialized to zero at power on or as the result of a hard reset 001b Reserved 010b Timestamp initialized by the SET TIMESTAMP command 011b Timestamp initialized by methods outside the scope of this standard TimeStamp The Timestamp field contains the current value of the timestamp The Time Stamp field returns the number of milliseconds that have elapsed since midnight 1 January 1970 UT Chapter 3 Supported SCSI Commands 3 71 SEND DIAGNOSTIC 1Dh By means of this command the media changer can be requested to perform a self test operation on itself During this self test the serial communication to the tape drive and robotics is tested Also any pending Hardware Error condition is reported on this command Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 1Dh 1 LUN PF 1 Reserved SelfT 1 DOfl 0 UOfl 0 2 Reserved 3 MSB Parameter List Length 0 4 LSB 5 Control Field descriptions PF Page Format The value for this bit must be set to 1 to indicate that the SEND DIAGNOSTICS parameters conform to the page structure as specified in SCSI
6. Reservation Key List See SPC 3 r23 PERSISTENT RESERVE IN Parameter Data for Read Reservation The format for the parameter data provided in response to a PERSISTENT RESERVE IN command with the Read Reservation service action is shown below Bit 7 6 5 4 3 2 1 0 Byte 0 MSB Generation 3 LSB 4 MSB Additional length n 7 7 LSB 8 MSB Reservation Descriptors n see next table LSB Field descriptions Generation See SPC 3 r23 Additional Length See SPC 3 r23 Reservation Descriptors See SPC 3 r23 PERSISTENT RESERVE IN Reservation Descriptor The format for the reservation descriptor is shown below There shall be a reservation descriptor for the persistent reservation if any present in the logical unit and a reservation descriptor for each element if any having a persistent reservation Bit 7 6 5 4 3 2 1 0 Byte 0 MSB Reservation Key 1 LSB 2 MSB Scope Specific Address Chapter 3 Supported SCSI Commands 3 43 Bit 7 6 5 4 3 2 1 0 Byte 3 LSB 4 Reserved 5 Scope Type 6 MSB Obsolete 7 LSB Field descriptions Reservation Key See SPC 3 r23 Scope Specific Address See SPC 3 r23 Scope See SPC 3 r23 Type See SPC 3 r23 3 44 TL2000 and TL4000 SCSI Reference PERSISTENT RESERVE OUT 5Fh The PERSISTENT RESERVE OUT command is used to request s
7. Full A full bit value of one indicates that the storage element of the changer device contains a tape cartridge A value of 0 indicates the storage address element is empty Additional Sense Code This field may provide specific information about an abnormal storage element state Additional Sense Code Qualifier This field may provide more detail about an abnormal storage element state SValid Source Valid When set to 1 indicates that the Source Storage Element Address field and the Invert bit information fields are valid When O indicates that the values in these fields are not valid Invert The library uses singe sided media and does not support inverting of the media The value reported for this field is 0 3 58 TL2000 and TL4000 SCSI Reference ED An ED bit of one indicates the element is disabled for example a magazine is not installed or has been logical disabled An ED bit value of zero indicates the element is enabled Medium Type The Medium Type field provides the type of medium currently present in the Storage Element The next table describes the values for the Medium Types Oh Unspecified th Data Medium 2h Cleaning Medium 3h Diagnostics Medium Ah WORM Medium 5h 7h Reserved Source Storage Element Address This field provides the address of the last storage element from which the tape cartridge was moved valid only if the SValid bit is 1 Primary Volume Tag Information When VolTag in the CDB is se
8. Sense Key Additional Sense Code and Additional Sense Code Qualifier provide a hierarchy of information The sense key provides generic categories in which error and exception conditions may be reported Additional sense code provide further detail describing the sense code Additional sense code qualifiers add further detail to the additional sense code These bytes show detailed information about the error and exception conditions See Chapter 7 Sense Keys ASC Information The contents of the information field is device type or command specific These bytes are always zero Additional Sense Length This field specifies the number of additional sense bytes to follow If the allocation length of the command descriptor block is too small to transfer all of the additional sense bytes the additional sense is not adjusted to reflect the truncation SKSV When the Sense Key Specific Valid bit is set to zero the data in the Sense Key Specific field Bytes 15 16 and 17 do not contain valid data When the SKSV bit is set to one bytes 15 16 and 17 contain additional information regarding the error condition C D A command data C D bit of one indicates that the illegal parameter is in the CDB A C D bit of zero indicates that the illegal condition is in the data parameters send by the host BPV A bit pointer valid BPV bit of zero indicates that the value in the Bit Pointer field is not valid A BPV bit of one indicates that the Bit Pointer f
9. 1 0x01 I O Station Element IEE 16 0x10 Data Transfer Element DTE 256 0x100 Storage Element STE 4096 0x1000 4117 0x1015 Table 2 2 TL2000 Tape Library SCSI element addresses for I O Station storage slots and drive slot Left Magazine lt Front of TL2000 Tape Library Slot 8 Slot 9 Slot 10 Slot 11 4103 4104 4105 4106 Slot 4 Slot 5 Slot 6 Slot 7 4099 4100 4101 4102 I O Station Slot 1 Slot 2 Slot 3 4096 4097 4098 Library Right Magazine Rear Panel Front of TL2000 Tape Library Drive 1 Slot 23 Slot 22 Slot 21 Slot 20 256 4118 4117 4116 4115 0x100 Sit19 Slotis Sloti7 Slot 16 4114 4113 4112 4111 Slot 15 Slot 14 Slot 13 Slot 12 4110 4109 4108 4107 Chapter 2 Library Features 2 5 TL4000 Tape Library Element Addressing Table 2 3 TL4000 Tape Library SCSI Element Types and Element Addresses Element Type Element Address Range Media Transport Element MTE 1 0x01 I O Station Element IEE 16 0x10 17 0x11 18 0x12 Data Transfer Element DTE 256 0x100 257 0x101 Storage Element STE 4096 0x1000 4139 0x102B Table 2 4 TL4000 Tape Library SCSI element addresses for I O Station storage slots and drive slot Upper Left Magazine Library Upper Right Magazine lt Front of TL4000 Tape Libr
10. 3 75 3 76 3 77 3 79 3 80 3 81 3 82 3 83 3 84 3 84 3 85 3 85 4 1 4 1 4 1 4 2 4 2 Disconnect ae Initiator Detected Error Abort Message Reject No Operation Message Parity Error Bus Device Reset Identify Chapter 5 Command Status Byte Chapter 6 Command Timeouts Chapter 7 Sense Keys ASC and ASCQ Index 42 4 2 4 2 4 2 4 3 4 3 4 3 6 1 7 1 X 1 Contents V vi TL2000 and TL4000 SCSI Reference Chapter 1 Introduction This document describes the SCSI Media Changer Command Set for the Dell PowerVault TL2000 Tape Library and TL4000 Tape Library The host will recognize both a tape drive and a Media Changer on the same SCSI ID On this SCSI ID logical unit zero is reserved for the tape drive and logical unit one is used for the media changer The tape drive will pass the received SCSI commands for LUN 1 over to the attached library controller by means of serial communication The SCSI media changer commands are based on the following specifications Document T10 Version ANSI INCITS Version SMC 2 T10 1383 D rev 7 ANSI INCITS 382 2004 SPC 3 T10 1416 D rev 23 SAM 2 T10 1157 D rev 24 ANSI INCITS 366 2003 A media changer logical unit receives commands to move cartridges between various types in the element address space The element types are storage import export data transfer and medium transport
11. The Identifier Length field contains the length in bytes of the Identifier field When the DVCID bit is not set in the CDB the Identifier Length field is set to OOh Identifier If the DVCID bit is set in the CDB the Identifier field provides the Vendor ID Product ID and tape drive serial number The format is identifier Type 1 which is equivalent to the drive s Inquiry page 83h If the DVCID bit in the CDB is set to 0 the Identifier field is omitted Next table contains a list of the ASC and ASCQ values that will appear in the Additional Sense Code and Additional Sense Code Qualifier fields of the Data Transfer Element descriptor if the element is in an abnormal state The Except field of an element descriptor indicates if an element is in an abnormal state ASC ASCQ Description Action 30h 03h Cleaning cartridge The element contains a cleaning cartridge 30h 83h Cleaning cartridge The element contains a cleaning cartridge without a readable bar without bar code label code label 3Bh 12h Magazine removed Insert magazine 80h BDh Drive communication The media changer has problems communicating with the tape problem drive Make sure the tape drive is properly connected 83h 00h Element not yet scanned The media changer has not scanned this element up to now 83h Oth No bar code label The element contains a cartridge without a readable bar code label 3 64 TL2000 and TL4000 SCSI Reference RELEASE 6 1
12. 07h Event Structure Tape Alert Log Page 2Eh Tape Alert Flag structure Statistics Counter Page 30h Statistic Counter structure Error Log Page 33h Error Event Structure MODE SELECT 6 15h Mode Select Parameter List Parameter List Header Parity page 00h Control Extension page OAh Tape Alert Page 1Ch Element Address Assignment page 1 Dh Transport Geometry Parameters page 1Eh Device Capabilities page 1Fh F Vendor Specific Event Filter page 20h MODE SELECT 10 55h shod MODE SENSE 6 1Ah Mode Parameter List Mode Parameter Header Parity page 00h Control Extension page OAh f Tape Alert page 1Ch 2 5 3 1 3 2 3 3 3 4 3 7 3 8 3 8 3 10 3 11 3 12 3 12 3 12 3 13 3 15 3 17 3 17 3 18 lt 3 19 3 19 3 21 3 22 3 22 3 22 3 23 3 27 3 30 3 31 3 31 3 32 3 32 3 33 Element Address Assignment page 1Dh Transport Geometry Parameters page 1Eh Device Capabilities page 1Fh Vendor Specific Event Filter page ake MODE SENSE 10 5Ah Mode Parameter List Mode Parameter Header MOVE MEDIUM Adh PERSISTENT RESERVE IN 5Eh eae oe oe PERSISTENT RESERVE IN Parameter Data for Read Keys PERSISTENT RESERVE IN Parameter Data for Read Reservation PERSISTENT RESERVE IN Reservation ne PERSISTENT RESERVE OUT 5Fh 4 PERSISTENT RESERVE OUT Parameter List OPEN CLOSE IMP
13. 2 SelfT This bit indicates whether the media changer should perform the diagnostic test specified in the parameter list or a standard self test The library only supports the self test and should therefore be set to 1 DOfl Device Offline Since diagnostics tests must be performed when the media changer is online the value of this bit must be set to 0 UOfl Unit Offline Since the media changer is a single logical unit the value of this bit must be set to 0 Parameter List Length The media changer does not accept additional parameters for diagnostics test Must be set to zero 3 72 TL2000 and TL4000 SCSI Reference SEND VOLUME TAG B6h The SEND VOLUME TAG command transfers a volume tag template to be used for a search of existing volume tag information or new volume tag information for one media changer element address The function of the command is conveyed by the Send Action Code field value The REQUEST VOLUME ELEMENT ADDRESS command may be used to transfer the results of a translate search operation Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code B6h 1 LUN Reserved Element Type Code 2 MSB Element Address 3 LSB 4 Reserved 5 Reserved Send Action Code 6 7 Reserved 8 MSB Parameter List Length 9 LSB 10 Reserved 11 Control Field descriptions Element Type Code The Element Type Code field specifies an element type specification a
14. CDB The sense data for these hosts will be set to Mode Parameters Changed 06 2A 01 The host provides the parameters through a parameter list to the media changer The parameter list consists of the following items e Parameter List Header e Mode Select page s Supported Mode Select pages Page Subpage Page Name Page Page Description Code Code saveable in NVRAM 00h 00h Parity Retry page Yes Provides means to select the maximum number retries performed on a parity error OAh Oth Control Extension page No Provides a means to read out the capabilities of the SET TIMESTAMP and REPORT TIMESTAMP commands 1Ch 00h Tape Alert page No Provides means to select a specific way to report a Tape Alert event 1Dh 00h Element Address Yes Provides a means to change SCSI element Assignment page address assignments and respective element ranges 1Eh 00h Transport Geometry No Provides a means to set the specifics about the page Transport Element not changeable Chapter 3 Supported SCSI Commands 3 21 1Fh 00h Device Capabilities No Provides a means to set the media changers page capabilities not changeable 20h 00h Event Filter page Yes This page provides a means to mask certain Vendor Specific error event types from the event logging of the SCSI controller Mode Select Parameter List The Mode Select parameter list shown below contains a 4 byte header followed
15. Check Condition status The sense key shall be set to ILLEGAL REQUEST and the sense data shall be set to COMMAND SEQUENCE ERROR If the data in the Echo Buffer has been overwritten by another host the library shall return Check Condition status The sense key shall be set to ILLEGAL REQUEST and the sense data shall be set to ECHO BUFFER OVERWRITTEN The maximum length of the Echo Mode buffer is 256 bytes Bit 7 6 5 4 3 2 1 0 Byte O n data defined by previous Echo Mode WRITE BUFFER command Echo Buffer Descriptor Mode In this mode the media changer returns the descriptor information for the Echo Buffer The Buffer Offset field is reserved in this mode The Buffer ID field is ignored in this mode Next table specifies the Buffer Descriptor which is returned on a READ BUFFER command in Echo Buffer Descriptor Mode Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved EBOS 1 Reserved 2 Reserved MSB 3 Buffer Capacity LSB Field descriptions EBOS The Echo Buffer Overwritten Support bit is set The library shall return ECHO_BUFFER_OVERWRITEN sense data when the buffer is overwritten by another initiator Buffer Capacity The Buffer Capacity field returns the maximum size of the Echo Buffer in bytes The Echo Buffer can store up to 256 bytes 3 52 TL2000 and TL4000 SCSI Reference READ ELEMENT STATUS B8h The READ ELEMENT STATUS command is sent to a target from the
16. Code OAh 1 Subpage code 01h 2 MSB Page Length 1Ch 3 LSB 4 Reserved TCMOS SCSIP IALUAE 5 Reserved Initial Priority 6 31 Reserved Field descriptions PS Parameters Savable This field is set to zero The media changer cannot write this page to non volatile memory SPF The Sub Page Format SPF bit is set to one to indicate this is a subpage TCMOS A TCMOS bit set to zero specifies that the timestamp shall not be changed by any method except those defined by this standard SCSIP A SCSI precedence SCSIP bit set to one specifies that the timestamp changed using a SET TIMESTAMP command shall take precedence over any other methods 3 32 TL2000 and TL4000 SCSI Reference IALUAE An implicit asymmetric logical unit access enabled IALUAE bit set to zero The media changer does not allow implicit asymmetric logical unit access state changes Tape Alert page 1Ch By means of this page the host can retrieve the tape alerts logging method Bit 7 6 5 4 3 2 1 0 Byte 0 PS 0 SPF 1 Page Code 0Ah 1 Additional Page Length OAh 2 Perf 0 Reserved DExcpt 1 Test 0 Reserved LogErr 3 Reserved MRIE 0 4 7 Interval Timer 8 11 Report Count Test Flag Number Field descriptions PS Parameters Savable This field is set to zero The media changer cannot write this page to non volatile memory Perf When this bit is set to 0 this indicates that informational excep
17. Command Operation Code Standard Support Status INITIALIZE ELEMENT STATUS 07h SMC 2 supported INITIALIZE ELEMENT STATUS WITH RANGE 37h SMC 2 supported INQUIRY 12h SPC 3 supported LOG SELECT 4Ch SPC 3 supported LOG SENSE 4Dh SPC 3 supported MODE SELECT 6 15h SPC 3 supported MODE SENSE 6 1Ah SPC 3 supported MODE SELECT 10 55h SPC 3 supported MODE SENSE 10 5Ah SPC 3 supported MOVE MEDIUM A5h SMC 2 supported OPEN CLOSE IMPORT EXPORT ELEMENT 1Bh SMC 3 supported PERSISTENT RESERVE IN 5Eh SPC 3 supported PERSISTENT RESERVE OUT 5Fh SPC 3 supported POSITION TO ELEMENT 2Bh SMC 2 supported PREVENT ALLOW MEDIUM REMOVAL 1Eh SPC 3 supported READ BUFFER 3Ch SPC 3 supported READ ELEMENT STATUS B8h SMC 2 supported RECEIVE DIAGNOSTIC RESULTS 1Ch SPC 3 not supported RELEASE 6 17h SPC 3 supported RELEASE 10 57h SPC 3 supported REPORT SUPPORTED OPERATION CODES A3h SPC 3 supported REPORT TIMESTAMP A3h SPC 3 supported REQUEST SENSE 03h SPC 3 supported REQUEST VOLUME ELEMENT ADDRESS B5h SMC 2 supported RESERVE 6 16h SPC 3 supported RESERVE 10 56h SPC 3 supported SET TIMESTAMP A4h SPC 3 supported SEND DIAGNOSTIC 1Dh SPC 3 supported SEND VOLUME TAG B6h SMC 2 supported TEST UNIT READY 00h SPC 3 supported WRITE BUFFER 3Bh SPC 3 supported 3 1 INITIALIZE ELEMENT STATUS 07h This command directs the medium changer to check all existing elements for tape cartridges and any status relevant to that element This command enables the initiator to g
18. Commands 3 19 Bit 7 6 5 4 3 2 1 0 Byte Error Event data n bytes 13 LSB n 1 13 MSB n Error Event description max 80 ASCII characters 96 LSB Field descriptions Parameter Code The Parameter Code is a 2 byte value that uniquely identifies the error event structure the log It ranges between 1 and 64 DU Disable Update is set for any parameter that the Host cannot reset DS Disable Save The media changer has no support for SP bit Set to 1 TSD Target shall determine save method ETC No threshold comparison TMC No threshold supported LP The List Parameter field is set to zero for parameters that are counters and set to one for parameters that are not counters Parameter Length The parameter length field specifies the length of the whole error event structure without the 4 byte header Event Type This field specifies the event type Since this page only returns error events it is set to 80h indicating Hard Error event Source module ID of Error Event This field specifies the ID of the source module which generated the error event See Log Sense page 07h for detailed information about the possible source module IDs Time of Event This field records the time the error event took place Length of Error Event data This field specifies the length in number of bytes of the error event data field Error Event data This field returns specific informatio
19. Element Type Code This field specifies the element type of the next element descriptor s The supported element type descriptors are th Medium Transport Element 2h Storage Element 3h Import Export Element 4h Data Transfer Element PVolTag Primary Volume Tag If the PVolTag bit is set the device returns Primary Volume Tag information in the Storage and Data Transfer Element descriptors AVolTag Alternate Volume Tag The library does not support dual sided media Therefore the Alternate Volume Tag label is always set to zero even when the VolTag bit is set in the CDB Element Descriptor Length This field indicates the number of bytes in each element descriptor Byte Count of Descriptor Data Available This field indicates the number of bytes of element descriptor data available for elements of this element type that meet the request in the CDB The value is not adjusted to match the allocation length available The element descriptors include the element address and status flags for the elements and may also contain sense code information and or other information depending on the element type The following subsections describe each of the possible element descriptors Medium Transport Element Status Page 01h The Medium Transport Element is the device that physically moves the tapes around in the library The library has one Medium Transport element This element can be addressed explicitly with the Medium Transport Element ad
20. Medium Changer 1 RMB 1 Reserved 2 Version 5 3 Obsolete Obsolete NormACA HiSup Response data format 2 0 4 Additional length 43h 3 4 TL2000 and TL4000 SCSI Reference Bit 7 6 5 4 3 2 1 0 Byte 5 SCCS ACC TPGS 3PC Reserved Protect 6 BQue EncServ Reserved MultiP MChngr Obsolete Obsolete Addr16 7 Obsolete Obsolete WBus16 Sync Linked Obsolete CmdQue Reserved 8 Vendor Identification 8 ASCII bytes 15 16 Product Identification 16 ASCII bytes 31 32 Product Revision level 4 ASCII bytes 35 36 Plant of manufacturer 37 38 Serial Number 12 ASCII bytes 49 50 Reserved 54 55 Reserved BarC 56 Clocking QAS IUS 57 Reserved 58 Version Descriptor 005Ch SAM 2 ANSI INCITS 366 2003 59 60 Version Descriptor OB56h SPI 4 ANSI INCITS 362 2002 61 62 Version Descriptor O2FEh SMC 2 ANSI INCITS 382 2004 63 64 Version Descriptor O30Fh SPC 3 T10 1416 D revision 22 65 66 Reserved 73 Field descriptions Peripheral Qualifier A return value of 0 indicates that the specified LUN is supported in this device When a unsupported LUN was specified the Peripheral Qualifier will return 3h which indicates that specified LUN is not supported Peripheral Device Type Indicates that this is a medium changer device Set to 8 When a unsupported LUN was specified the Peripheral Device Type will return 1F
21. RMU functions please refer to the RMU specification Operator Control Panel Features The library is equipped with an Operator Control Panel OCP By means of the OCP a user can perform simple actions with the media changer The OCP interface allows a user to monitor the media changer operation make configuration changes and perform media access commands When a user executes a medium access command through the OCP interface the media changer will enter the off line state When the media changer is off line the media changer will report Not Ready on the SCSI bus For an extensive description of the OCP functions please refer to the OCP specification Console Features The library is equipped with a serial port which allows a console interface to control the media changer The console interface allows a user to monitor the media changer operation make configuration changes and perform media access commands When a user executes a medium access command through the console interface the media changer will enter the off line state When the media changer is off line the media changer will report Not Ready on the SCSI bus For an extensive description of the console functions please refer to the Console specification 2 4 112000 and TL4000 SCSI Reference TL2000 Tape Library Element Addressing Table 2 1 TL2000 Tape Library SCSI Element Types and Element Address Ranges Element Type Element Address Range Media Transport Element MTE
22. SP Reserved i Reserved Reserved Reserved Reserved IMSB Parameter list length LSB O OINI ODO Oa AJOJN Control Field descriptions PF A PF bit of one indicates that the MODE SELECT parameters following the header and block descriptor s complies with the SCSI 2 specification The value must be set to 1 SP A Save Pages SP bit of zero indicates the media changer shall perform the specified MODE SELECT operation and shall not save any pages in non volatile ram An SP bit of one indicates that the media changer shall perform the specified MODE SELECT operation and shall save the current values to a non volatile RAM Chapter 3 Supported SCSI Commands 3 29 MODE SENSE 6 1Ah The MODE SENSE 6 command provides a means for a device server to report parameters to an application client It is a complementary command to the MODE SELECT 6 command Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 1Ah 1 LUN Reserved DBD Reserved 2 PC Page Code 3 Subpage Code 4 Allocation length 5 Control Field descriptions DBD The Disable Block Descriptors bit specifies if the media changer may return block descriptor after the Parameter List Header The media changer does not support block descriptors therefore this bit is ignored PC The Page Control field defines the type of mode parameter v
23. The cartridge handling robotic subsystem addressed as a medium transport element moves cartridges within a media changer The media changer logical unit maintains an inventory of cartridges and the element addresses The media changer logical unit reports this inventory when requested as well as identifying the element address assigned to different types of elements 1 1 1 2 TL2000 and TL4000 SCSI Reference Chapter 2 Library Features The library includes the following components e Operator panel with LCD display and 4 buttons which allows you to monitor the media changer operations control robotic operation and change configuration settings e Bar code scanner the media changer uses the bar code scanner to read the bar codes from the data cartridges and report this information as part of the cartridge inventory e Ethernet port for connecting to a 10 100Base T Ethernet network This connection allows remote monitoring of the media changer s operation performing firmware upgrades and configuring its settings This port is also called RMU Remote Management Unit e LVD SCSI or Fibre Channel port through this port the host sends SCSI commands to both the media changer and the tape drive e Serial monitor port through this port the media changer can be controlled by a console interface e Cartridge mover which moves cartridges from one location to the other This element is also called a medium transfer element e Storage slot
24. client to the device server to identify the initiator that is the source of the PERSISTENT RESERVE OUT command Service Action Reservation Key For the Register and Register and Ignore Existing Key service action the Service Action Reservation Key contains the new registration key to be registered For the Preempt and Preempt and Abort service actions the Service Action Reservation Key field contains the reservation key of the persistent reservations that are being preempted The Service Action Reservation Key field is ignored for all other service actions Scope Specific Address If the Scope is an Element Scope reservation the Scope Specific Address field shall contain the element address zero filled in the most significant two bytes APTPL The Activate Persist Through power Loss APTPL bit shall be valid only for the Register or the Register and Ignore Existing Key service action In all other cases the APTPL bit shall be ignored 3 46 TL2000 and TL4000 SCSI Reference OPEN CLOSE IMPORT EXPORT ELEMENT 1Bh The OPEN CLOSE IMPORT EXPORT ELEMENT command allows an application client to open the Import Export element also referred to as I O Station When the action code is set to Open Import Export Element the library will open the import export element The library will not return a Check Condition status when the import export element was already open When media removal is prevented and the I O Station is full the OPEN CLOSE IMPOR
25. element full 53h 02h Library media removal prevented state set 53h 03h Drive media removal prevented state set 44h 80h Bad status library controller 44h 81h Source not ready 44h 82h Destination not ready 44h 83h Cannot make reservation 44h 84h Wrong drive type 44h 85h Invalid slave robotic controller request 44h 86h Accessor not initialized Unit Attention 06h 28h 00h Not ready to ready transtion 28h Oth Import export element accessed 29h Oth Power on occurred 29h 02h SCSI Bus reset occurred 29h 05h Bus type changed to Single Ended SE 29h 06h Bus type changed to Low Voltage Differential LVD 2Ah Oth Mode parameters changed 2Ah 10h Time stamp changed 3Bh 13h Medium magazine inserted 3Fh Oth Microcode has changed 53h 02h Media removal prevented 7 4 TL2000 and TL4000 SCSI Reference Sense Key ASC ASCQ Description Command Aborted OBh 3Fh OFh ECHO buffer overwritten 43h 00h SCSI message error 47h 00h SCSI parity error 49h 00h SCSI invalid message 4Eh 00h Overlapped command attempt Chapter 7 Sense Keys ASC and ASCQ 7 5 7 6 TL2000 and TL4000 SCSI Reference Index Numerics 00h TEST UNIT READY 3 83 03h REQUEST SENSE 3 76 07h INITIALIZE ELEMENT STATUS 3 2 12h INQUIRY 3 4 16h RESERVE 3 81 17h RELEASE 3 65 1Ah MODE SENSE 3 30 1Bh OPEN CLOSE IMPORT EXPORT ELEMENT 3 47 1Dh SEND DIAGNOSTIC 3 72 1Eh PREVENT ALLOW MEDIA REMOVAL 3 49 2Bh POSITIO
26. initiator requesting that the target report the status of its internal elements Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code B8h 1 LUN VolTag Element Type Code 2 MSB Starting Element Address 3 LSB 4 MSB Number of Elements 5 LSB 6 Reserved CurData DVCID 7 MSB 8 Allocation Length 9 LSB 10 Reserved 11 Control Field descriptions VolTag If the VolTag bit is set the media changer shall return volume tag information in the element descriptors If the VolTag bit is not set the media changer shall not return volume tag information Element Type Code This field specifies the element type or types selected to report in response to this command A value of 0 indicates that status for all element types is to be reported Oh Report all element types th Report Medium Transport Elements Cartridge pickers 2h Report Storage Elements Cartridge Slots 3h Report Import Export Elements I O Slots 4h Report Data Transfer Elements Tape drives 5h Fh Reserved Starting Element Address This field indicates the starting element address Elements greater or equal than the starting address are returned Number of Elements This field specifies the maximum number of element descriptors to return If the allocation length is not sufficient to transfer all of the element information the target transfers all the information that can be completely transf
27. media changer shall return 02 04 01 status When initializing is finished the media changer shall return a unit attention 06 28 00 before returning Ready status The following non media access commands are allowed during the Not Ready reason Allowed commands during not ready state INQUIRY LOG SENSE MODE SENSE 6 MODE SENSE 10 PERSISTENT RESERVE IN 2 2 TL2000 and TL4000 SCSI Reference Allowed commands during not ready state PREVENT ALLOW MEDIUM REMOVAL prevent 0 READ ELEMENT STATUS curdata 1 READ ELEMENT STATUS dvcid 1 RELEASE 6 RELEASE 10 REQUEST SENSE WRITE BUFFER Commands Allowed in the Presence of Reservations The details of which commands are allowed under a reservations are described in next table The RESERVE and RELEASE commands are used to manage the reservation state of the library Next table shows all commands allowed in the presence of reservations o Command reserved by nother initiator INITIALIZE ELEMENT STATUS conflict INITIALIZE ELEMENT STATUS WITH RANGE conflict INQUIRY allowed LOG SELECT conflict LOG SENSE allowed MODE SELECT 6 conflict MODE SENSE 6 allowed MODE SELECT 10 conflict MODE SENSE 10 allowed MOVE MEDIUM conflict OPEN CLOSE IMPORT EXPORT ELEMENT conflict PERSISTENT RESERVE IN allowed PERSISTENT RESERVE OUT conflict P
28. phase The message is not sent when disconnecting after a command descriptor block that did not transfer data Restore Pointers The media changer sends the RESTORE POINTERS message to direct the initiator to copy the most recently saved command data and status pointers of the 1 0 process to the corresponding active pointers The command and status pointers are restored to the value at the beginning of the data area The media changer sends the Restore Pointers message after a detecting a parity error during the command phase or data out phase After the media changer successfully sends the Restore Pointers message to the initiator the media changer restarts the command data in data out or status phase from the beginning Disconnect The DISCONNECT message is sent by a target to inform an initiator that the present data transfer will be suspended the target will reselect the initiator at a later time to continue the current operation Initiator Detected Error The INITIATOR DETECTED ERROR message is sent from an initiator to inform a target that an error occurred This allows the target to retry the operation Abort The ABORT message terminates the current I O process The target goes directly to the BUS FREE phase after receipt of this message Message Reject The MESSAGE REJECT message is sent from the initiator or target to indicate that the last message received was inappropriate or not implemented 4 2 112000 and TL4000 SCSI
29. previously send code After download completion the media changer shall generate a unit attention condition to all initiators The additional sense code shall be MICROCODE HAS BEEN CHANGED The Parameter List Length of the firmware image is not defined it may be set to any size maximum FFFFh 65535 The supported Buffer ID field for Mode 4 Download micro code and Mode 5 Download micro code and save are Buffer ID Description Parameter List Length 00h Library Firmware Image variable 88h Library Firmware Image variable AAh Robotics Firmware Image variable Mode 4 should be used for all transfers and the last transfer can be Mode 4 or Mode 5 Echo Buffer Mode In this mode the host can send data to the echo buffer The data in the echo buffer is preserved until the library is reset power cycled or overwritten by another host The Buffer ID and Buffer Offset fields are ignored in this mode The capacity of the echo buffer may be determined by the Buffer Capacity field in the READ BUFFER echo buffer descriptor The maximum length of the Echo Mode buffer is 256 bytes When the parameter list length exceeds the total length of this page the library shall return Check Condition status The sense key shall be set to ILLEGAL REQUEST and the sense data set to INVALID FIELD IN CDB Bit 7 6 5 4 3 2 1 0 Byte O n Echo Mode WRITE BUFFER data Chapter 3 Supported SCSI Commands 3 85 3 86 TL2000 and TL40
30. the four bytes of the header Supported Pages Log Page 00h When page 0 is requested the 4 byte page header is returned followed by the pages supported in ascending order one byte for each page Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved Page Code 00h 1 Reserved 2 3 Page Length 5 4 00h Supported Log Pages page 5 07h Event Log page 6 2Eh Tape Alert page 7 30h Statistics Counter page 8 33h Error Log page Event Log Page 07h In the Event Log the media changer keeps track of different system events These events exist out of hardware errors executed commands and debug information The events are stored in a FIFO mode this means that only the n most recent events are stored Older events are deleted This log is stored in non volatile memory NVRAM and is therefore resistant to power failures The data returned for the Event log page shall not exceed 64KBytes A single LOG SENSE command to the Event Log page may return all events The Event Log page starts with a header indicating the number of bytes of the total event history followed by zero or more event structures Reading the Event Log page shall not clear the event data Clearing the event data is done by means of the LOG SELECT command Note The Host may specify what event types need to be logged This is done with the MODE SELECT command to the vendor specific Event Filter page 3 12 TL2000 and TL400
31. the media changer is controlled by the media changers internal firmware In this mode the media changer will automatically replace an ejected cartridge from the tape drive with another one from the media changers inventory The media changer can be configured into Sequential mode by means of the OCP menu or RMU browser e OCP RMU Console Control mode off line in which the media changer is controlled by a user These control modes allow the user to send media access commands like move cartridges between existing elements The media changer will return Not Ready status on media access SCSI command when the media changer is off line The media changer will accept media access SCSI commands when the media changer is on line About the Not Ready Condition The media changer reports Not Ready when it is unable to accept medium access commands During the Not Ready reason the media changer will perform all non media access commands as specified The media changer is Not Ready when e Its initialization routine is in progress e It is in sequential mode e It is off line e A magazine is removed Not Ready reason Sense code during Sense info after Not Ready reason finished Initializing 02 04 01 06 28 00 Magazine removed 02 3B 12 02 04 01 see note 1 Sequential Mode 02 04 8E 06 28 00 Off line 02 04 12 06 28 00 Note When a magazine is inserted the media changer will automatically re initialize During this process the
32. the next move command is received 15d Drive Load There is a potential problem with the cartridge loader or drive when Retry placing a cartridge into a drive e No action needs to be taken at this time e If the problem persists contact Technical Support This flag is cleared when the next move command is received 16d Library Door The operation has failed because the library door is open e Clear any obstructions from the library door e Close the library door e If the problem persists contact Technical Support This flag is cleared when the door is closed 17d Library I O There is a mechanical problem with the library media I O Station Station 18d Library The library cannot operate without the magazine Magazine e Insert the magazine into the library e Restart the operation 19d Library Library security has been compromised The door was opened then Security closed during operation 21d Library Offline The library has been manually turned offline and is unavailable for use 22d Library drive A drive inside the library has been taken offline This is for information Offline purposes only No action is required 24d Library The library has detected an inconsistency in its inventory Inventory e Redo the library inventory to correct inconsistency Restart the operation Check the applications users manual or the hardware users manual for specific instructions on redoing the library inventory 25d Library Illegal A library operation has been a
33. 0 SCSI Reference Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved Page Code 07h 1 Reserved 2 3 Page Length 4 Events Structures XXxxh Field descriptions Page Code The Page Code echoes the page code that was specified in the LOG SENSE CDB Page Length The Page Length specifies the total number of event bytes not including the four bytes for this header Event Structure An event structure consists of a header and a variable number of event data bytes This structure is defined in the next table Event Structure An event structure consists of two parts a 13 byte event header and optional event data The event header contains info about event type source module of event time of event data type and event data length The optional event data does not exceed 114 bytes When this field is returned it contains specific information about the event See next structure Bit 7 6 5 4 3 2 1 0 Byte 0 MSB Parameter Code 1 LSB 2 DU 0 DS 1 TSD 0 ETC 0 TMC 0 Reserved Reserved LP 3 Parameter Length n 3 4 Event type 5 6 Source module ID of event 7 10 Time of event sec 11 Data type of event data 12 Length of event data 13 n Event data 0 114 bytes Field descriptions Parameter Code The Parameter Code is a 2 byte value that uniquely identifies the event within the log DU Disable Upda
34. 00 SCSI Reference Chapter 4 Messages The message system allows communication between the host and the media changer logical unit for the purpose of physical path management Description Code Direction COMMAND COMPLETE 00h In EXTENDED MESSAGES Oth In Out SAVE DATA POINTERS 02h In RESTORE POINTERS 03h In DISCONNECT 04h In INITIATOR DETECTED ERROR 05h Out ABORT 06h Out MESSAGE REJECT 07h In Out NO OP 08h Out MESSAGE PARITY ERROR 09h Out BUS DEVICE RESET OCh Out IDENTIFY 80h COh In Out Command Complete The COMMAND COMPLETE message is sent from a target to an initiator to indicate that the execution of a command completed and a valid status has been sent to the initiator Extended messages The library supports two extended messages Synchronous Data Transfer Request 01h and Wide Data Transfer Request 03h All other extended messages are rejected with a Reject message after receiving the entire Extended message The SDTR is used to negotiate data transfer agreements If the host wants to transfer data synchronously it must negotiate a synchronous data transfer agreement with the target before transferring data The media changer does not support synchronous data transfer When it receives a SDTR from a initiator it returns a SDTR message with a REQ ACK offset equal to zero This indicates that the media changer requires asynchronous data transfer
35. 00h 68 All pages Returns all Mode Sense pages in incrementing order 3Fh FFh 100 All pages including Returns all Mode Sense pages including subpages subpages in incrementing order Note The number bytes column does not include the Parameter List Header and the optional Block Descriptor A page code of 3Fh indicates that all mode pages shall be returned to the application client These pages will be returned in ascending order except for Mode Page 00h Mode Page 00h shall be returned after all other Mode Pages Mode Parameter List Each Mode Sense page begins with a four byte Parameter List Header and optionally followed by an eight byte Block Descriptor before one or all Mode Sense pages are returned Bit 7 6 5 4 3 2 1 0 Byte 0 3 Mode Parameter Header 4 n Mode Sense Page s Mode Parameter Header Each Mode Sense page begins with a four byte Mode Parameter Header This header has the following structure Bit 7 6 5 4 3 2 1 0 Byte 0 Mode Data Length 1 Reserved 2 Reserved 3 Block Descriptor Length Field descriptions Mode Data Length This field indicates the number of bytes of parameter information the media changer is returning as a result of this command excluding the Mode Data Length but including the three additional Parameter List Header bytes If a block descriptor was requested this count is also added to the Mode Data Length
36. 0h Network 4000h RMU 8000h 3 38 TL2000 and TL4000 SCSI Reference MODE SENSE 10 5Ah The MODE SENSE 10 command provides a means for a device server to report parameters to an application client It is a complementary command to the MODE SELECT command For documentation on the supported Mode Pages refer to the Mode Sense 6 command Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 5Ah LUN Reserved DBD Reserved PC Page Code Subpage Code Reserved Reserved Reserved MSB Allocation length LSB O MINI DO aA AJOI N Control Field descriptions DBD The Disable Block Descriptors bit specifies if the media changer may return block descriptor after the Parameter List Header The media changer does not support block descriptors therefore this bit is ignored PC The Page Control field defines the type of mode parameter values to be returned in the mode pages 00b Report Current Values equal to default values if no pages previously saved 01b Report changeable values 10b Report Default Values 11b Report Saved Values equal to default values if no pages previously saved Page Code The page code defines which pages should be returned A Initiator can request one or all mode sense pages Each response includes four bytes for the Parameter List Header followed by the specified number of bytes for each page Mode Parameter List The retur
37. 1 First Element Address Reported 2 3 Number of Elements Available 4 Reserved 5 7 Byte Count of Report Available Field descriptions First Element Address Reported This field indicates the element address of the element with the smallest element address found to meet the Read Element Status command s request Number of Elements Available This field indicates the number of elements found The status for these elements is returned if the Allocation Length specified in the Read Element Status command s CDB was sufficient Byte Count of Report Available This field indicates the number of available element status bytes that meet the CDB requirements This value does not adjust to match the Allocation Length field of the CDB and does not include the 8 byte element status header Element Status Page Sub header and Element Descriptor The Element Status Page includes an 8 byte sub header and one or more element descriptors The sub header includes the element type code the settings for PVolTag and AVolTag the length of each descriptor block and the number of bytes of descriptor information that follow the header for the element Bit 7 6 5 4 3 2 1 0 0 Element Type Code 1 PvolTag AvolTag Reserved 2 3 Element Descriptor Length 3 54 TL2000 and TL4000 SCSI Reference Bit 7 6 5 4 3 2 1 0 4 Reserved 5 7 Byte Count of Descriptor Data Available Field descriptions
38. 11 12 13 14 15 5 7 3 7 T L Product Revision Level This field contains 4 bytes of ASCII data that provides the media changer s software revision levels When a firmware update is performed on the media changer this part of the revision level changes to reflect that update BarC When set this bit indicates that the library is equipped with a bar code scanner IUS Information Units Supported Set to O indicating information units are not supported QAS Quick Arbitrate Supported Set to 0 indicating QAS is not supported Clocking Indicates the level of data clocking supported Set to 11b if the host interface speed has not been set to limit transfers to 80MB s Set to 00b when the host interface speed has been set to limit transfers to 80 MB s Version Descriptors The version descriptors report the identifier of the supported SCSI command sets Supported Vital Product Data page 00h The Supported Vital Product Data VPD page provides a directory of the Vital Product Data Pages that are supported by the media changer Bit 7 6 5 4 3 2 1 0 Byte 0 Peripheral Qualifier 0 Peripheral Device Type 8 Page Code 00h Reserved Page Length 04h 00h this page 80h Unit Serial Number Page 83h Device Identification Page a COh Firmware Build Information Page DOh Vendor Specific Page FFh Vendor Use Only O OINI ODO a A
39. 4 Reserved Code Set 2 5 Reserved Identifier Type 1 6 Reserved 7 Identifier Length 28h 8 Vendor Identification 8 ASCII bytes 1 16 Product Identification 16 ASCII bytes 31 32 Serial Number 12 ASCII bytes 43 44 Unique Logical Library Identifier 47 3 8 TL2000 and TL4000 SCSI Reference Note If an unsupported LUN was initially specified the Peripheral Qualifier will return 3h and the Peripheral Device Type will return 1Fh Field descriptions Peripheral Qualifier A return value of 0 indicates that the specified LUN is supported in this device When a unsupported LUN was specified the Peripheral Qualifier will return 3h which indicates that specified LUN is not supported Peripheral Device Type Indicates that this is a medium changer device Set to 8 When a unsupported LUN was specified the Peripheral Device Type will return 1Fh which indicates that specified LUN is not supported Code Set This field is set to 2 indicating that the device identifier is returned as an ASCII string Identifier Type The Identifier Type is set to 1 indicating that the T10 style identifier is returned Vendor Identification This field returns the eight byte Vendor ID ASCII string Product Identification This field returns the sixteen byte Product ID ASCII string Serial Number This field returns the twelve byte serial number ASCII string Unique Logical Library Identifier Such as the ASCII representation of th
40. 7 6 5 4 3 2 1 0 0 Operation Code 56h 1 LUN 3rdPty Reserved LongID Reserved Obsolete Third Party Device ID Reserved Reserved Reserved MSB Parameter List Length LSB O OINI OD a AJOJN Control Field descriptions LongID Device IDs greater than 255 are not supported therefore setting of LongID will result in a Check Condition status The Sense Key will be set to ILLEGAL REQUEST and the sense data to INVALID FIELD IN CDB 3rdPty If the third party 3rdPty bit is zero then a third party reservation is not requested If the 3rdPty bit is zero then the LongID and Parameter List Length field shall be ignored If the 3rdPty bit is one then the library is reserved by the initiator ID specified in the Third Party Device ID field The reservation is preserved until it is superseded by another valid RESERVE command from the initiator that made the reservation or until it is released by the same initiator by a SCSI RESET message or by a Hard Reset condition or by a power on cycle The library shall ignore any attempt to release the reservation made by any other initiator Third Party Device ID This field provides the Device ID for the third party when 3rdPty bit is set 3 82 TL2000 and TL4000 SCSI Reference TEST UNIT READY 00h TEST UNIT READY checks if the media changer is ready for commands involving cartridge movement If the media changer has completed initia
41. 7h The RELEASE command is used to release a previously reserved logical unit Bit 7 6 5 4 3 2 1 Byte 0 Operation Code 17h 1 LUN Obsolete 2 Obsolete 3 Reserved 4 Reserved 5 Control Field descriptions Chapter 3 Supported SCSI Commands 3 65 RELEASE 10 57h The RELEASE 10 command is used to release a previously reserved logical unit This library supports Third Party reservation Third Party release allows an application client to release a logical unit that was previously reserved using third party reservation Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 57h LUN 3rdPty Reserved LongID Reserved Obsolete Third Party Device ID Reserved Reserved Reserved MSB Parameter List Length LSB O MINIDO aA RR wo rm Control Field descriptions LongID Device IDs greater than 255 are not supported therefore setting of LongID will result in a Check Condition status The Sense Key will be set to ILLEGAL REQUEST and the sense data to INVALID FIELD IN CDB 3rdPty If the third party 3rdPty bit is zero then a third party release is not requested If the 3rdPty bit is zero then the LongID and Parameter List Length field shall be ignored If the 3rdPty bit is one then the library shall release the reservation but only if the initiator ID and Third Party Device ID are identical when compar
42. Code field specifies an operation code that has service actions then the command shall be terminated with CHECK CONDITION status with the sense key set to ILLEGAL REQUEST and the additional sense code set to INVALID FIELD IN CDB 010b The command support data for the operation code and service action specified in the Requested Operation Code Cdb field and Requested Service Action Cdb field shall be returned in the one_command parameter data format If the Requested Operation Code Cdb field specifies an operation code that does not have service actions then the command shall be terminated with CHECK CONDITION status with the sense key set to ILLEGAL REQUEST and the additional sense code set to INVALID FIELD IN CDB 011b Reserved Requested Operation Code The Requested Operation Code field specifies the operation code of the command to be returned in the one_command parameter data format Requested Service Action The Requested Service Action field specifies the service action of the command to be returned in the one_command parameter data format Chapter 3 Supported SCSI Commands 3 67 Allocation Length The Allocation length field specifies the length in bytes that the initiator has allocated for returned data The REPORT SUPPORTED OPERATION CODES all_commands parameter data format begins with a four byte header that contains the length in bytes of the parameter data followed by a list of supported commands Each comma
43. Dell PowerVault TL2000 TL4000 Tape Library SCSI Reference Second Edition March 2007 Information in this document is subject to change without notice 2007 Dell Inc All rights reserved Reproduction in any manner whatsoever without the written permission of Dell Inc is strictly forbidden Trademarks used in this text Dell the DELL logo and PowerVault are trademarks of Dell Inc Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products Dell Inc disclaims any proprietary interest in trademarks and trade names other than its own Contents Chapier 1 Introduction Chapter 2 Library Features Cleaning Cartridge Detection Auto Clean Mode User Commanded Cleaning Control Modes About the Not Ready Condition Commands Allowed in the Presence of Reservations RMU Features Operator Control Panel Features Console Features TL2000 Tape Library Element Addressing TL4000 Tape Library Element Addressing Chapter 3 Supported SCSI Commands INITIALIZE ELEMENT STATUS 07h INITIALIZE ELEMENT STATUS WITH RANGE 37h INQUIRY 12h Standard Inquiry Data ae Supported Vital Product Data page 00h Unit Serial Number page 80h Device Identification page 83h Firmware Built Information page COh LOG SELECT 4Ch LOG SENSE 4Dh Log Page Header format Supported Pages Log Page 00h Event Log Page
44. Descriptor 8 9 Import Export Element Address Chapter 3 Supported SCSI Commands 3 59 Bit 7 6 5 4 3 2 1 0 Byte 10 OIR CMC InEnab ExEnab Access Except ImpExp Full 11 Reserved 12 Additional Sense Code 13 Additional Sense Code Qualifier 14 Reserved 17 SValid Invert Reserved ED Medium Type 18 Source Storage Element Address 19 20 Primary Volume Tag Information 55 field omitted if PVolTag 0 56 Reserved 59 field moved up if Primary Volume Tag Information field is omitted Field descriptions PVolTag Primary Volume Tag When set this flag indicates valid information in the Primary Volume Tag Information field This flag will be set when the VolTag field was set in the CDB AVolTag Alternate Volume Tag Always set to 0 Import Export Element Address This field provides the address of the import export element of this changer device whose status is reported by this element descriptor block Full A full bit value of 1 indicates that the import export element address contains a unit of media A value of 0 indicates the import export element address is empty ImpExp An import export bit of one indicates the unit of media in the import export element was placed there by an operator An bit of zero indicates the unit of media in the import export element was placed there by the medium transport element Except Exception An exception b
45. I Reference Chapter 6 Command Timeouts Next table will list the library media changer commands with the recommended maximum time out values Note If the library is working in a multi host environment the time out values should be adjusted for the worst case time out value from a pending motion command from another host Op Code SCSI Command Command Timeout Notes 07h INITIALIZE ELEMENT STATUS 11 minutes 1 37h INITIALIZE ELEMENT STATUS WITH RANGE with FAST bit 11 minutes 2 set ignore bar code labels INITIALIZE ELEMENT STATUS WITH RANGE with FAST bit 11 minutes 2 cleared scan bar code labels 12h INQUIRY 10 seconds 4Ch LOG SELECT 30 seconds 4Dh LOG SENSE 30 seconds 15h MODE SELECT 6 30 seconds 55h MODE SELECT 10 30 seconds 1Ah MODE SENSE 6 30 seconds 5Ah MODE SENSE 10 30 seconds A5h MOVE MEDIUM slot to slot 12 minutes MOVE MEDIUM slot to drive 25 minutes MOVE MEDIUM implicit drive to slot the media changer 25 minutes 3 initiates the unload of the cartridge from the drive The MODE MEDIUM command timeout has been adjusted to account for maximum unload time MOVE MEDIUM explicit drive to slot the host has issued an 13 minutes UNLOAD command to the tape drive prior to issuing the MOVE MEDIUM command 1Bh OPEN CLOSE IMPORT EXPORT ELEMENT 10 minutes 5Eh PERSISTENT RESERVE IN 30 seconds 5Fh PESISTENT RESERVE OUT 30 seconds 2Bh POSIT
46. ION TO ELEMENT TBD 1Eh PREVENT ALLOW MEDIUM REMOVAL 30 seconds 3Ch READ BUFFER 30 seconds 4 B8h READ ELEMENT STATUS 30 seconds 17h RELEASE 6 30 seconds 57h RELEASE 10 30 seconds 02h REQUEST SENSE 10 seconds 16h RESERVE 6 30 seconds 56h RESERVE 10 30 seconds A3h REPORT TIMESTAMP 30 seconds A3h REPORT SUPPORTED OPERATION CODES 30 seconds B5h REQUEST VOLUME ELEMENT ADDRESS 30 seconds 1Dh SEND DIAGNOSTICS 30 seconds 6 1 B6h SEND VOLUME TAG 30 seconds A4h SET TIMESTAMP 30 seconds 00h TEST UNIT READY 10 seconds 3Bh WRITE BUFFER 3 minutes Notes 1 The Initialize Element Status time out assumes a fully populated unit 2 The Initialize Element Status With Range time out assumes a fully populated unit 3 The Move Medium command assumes a move from one storage element to the data transfer element or vice versa If the cartridge has not been unloaded by a host command to the tape drive prior to receiving the Move Medium command the media changer will issue an Unload command to the tape drive Therefore the time out value needs to be adjusted fro the maximum time a data transfer element takes to rewind and unload the cartridge 4 The Read Buffer time out is based on a 16K data chunk request Adjust the time out value if larger data chunks are requested 5 The Write Buffer time out is based on a 16K data chunk request Adjust the time out value if larger data chunks are sent 6 2 TL2000 and
47. JOJN Note If an unsupported LUN was initially specified the Peripheral Qualifier will return 3h and the Peripheral Device Type will return 1Fh Chapter 3 Supported SCSI Commands 3 7 Unit Serial Number page 80h The Unit Serial Number VPD page contains 12 bytes of ASCII data representing a unique serial number of the media changer Bit 7 6 5 4 3 2 1 0 Byte 0 Peripheral Qualifier 0 Peripheral Device Type 8 1 Page Code 80h 2 Reserved 3 Page Length 10h 4 Serial Number 12 ACSII bytes 15 16 Unique Logical Library Identifier 19 Note If an unsupported LUN was initially specified the Peripheral Qualifier will return 3h and the Peripheral Device Type will return 1Fh Field descriptions Serial Number The 12 byte ASCII Serial Number may contain ASCII numbers and ASCII characters and is right justified with leading zeros Unique Logical Library Identifier Such as the ASCII representation of the logical library name for example _LL3 Device Identification page 83h The Device Identification VPD page provides the means to retrieve identification descriptors from the media changer Both fiber channel and SCSI devices return the following Device Identification VPD page Bit 7 6 5 4 3 2 1 0 Byte 0 Peripheral Qualifier 0 Peripheral Device Type 8 1 Page Code 83h 2 Reserved 3 Page Length 2Ch
48. N TO ELEMENT 3 48 37h INITIALIZE ELEMENT STATUS WITH RANGE 3 3 3Bh WRITE BUFFER 3 84 3Ch READ BUFFER 3 50 4Ch LOG SELECT 3 10 4Ch MODE SELECT 3 21 4Dh LOG SENSE 3 11 55h MODE SELECT 3 29 56h RESERVE 10 3 82 57h RELEASE 10 3 66 5Ah MODE SENSE 3 39 5Eh PERSISTENT RESERVE IN 3 42 5Fh PERSISTENT RESERVE OUT 3 45 A A3h REPORT SUPPORTED OPERATION CODES 3 67 A3h REPORT TIMESTAMP 3 70 A4h SET TIMESTAMP 3 75 A5h MOVE MEDIUM 3 41 abort 4 2 ASC 7 1 ASCQ 7 1 B B5h REQUEST VOLUME ELEMENT ADDRESS 3 79 B6h SEND VOLUME TAG 3 73 B8h READ ELEMENT STATUS 3 53 bus device reset 4 3 C cartridge cleaning detection 2 1 command complete 4 1 Command Status Byte 5 1 command supported 3 1 command timeouts 6 1 commands allowed in the presence of reservations 2 3 console features 2 4 control modes 2 1 D disconnect 4 2 drive auto clean mode 2 1 user commanded cleaning 2 1 E error initiator detected 4 2 F features 2 1 identify 4 3 INITIALIZE ELEMENT STATUS 07h 3 2 INITIALIZE ELEMENT STATUS WITH RANGE 37h 3 3 INQUIRY 12h 3 4 L LOG SELECT 4Ch 3 10 LOG SENSE 4Dh 3 11 M message parity error 4 3 message reject 4 2 messages extended 4 1 MODE SELECT 4Ch 3 21 MODE SELECT 55h 3 29 MODE SENSE 1Ah 3 30 MODE SENSE 5Ah 3 39 MOVE MEDIUM A5h 3 41 N no operation 4 3 Not Ready Condition about 2 2 O OCP features 2 4 O
49. ORT EXPORT ELEMENT E POSITION TO ELEMENT 2Bh PREVENT ALLOW MEDIA REMOVAL 1 Eh READ BUFFER 3Ch Loe Vendor Unique Mode Descriptor Mode Data Mode Echo Mode Echo Buffer Descriptor Mode READ ELEMENT STATUS B8h Element Status Data Header Element Status Page Sub header and Element Descriptor Medium Transport Element Status Page 01h Storage Element Status Page 02h Import Export Element Status Page 03h Data Transfer Element Status Page 4h RELEASE 6 17h RELEASE 10 57h REPORT SUPPORTED OPERATION CODES A3h REPORT TIMESTAMP A3h 8 SEND DIAGNOSTIC 1Dh SEND VOLUME TAG B6h Send Volume Tag Parameter structure SET TIMESTAMP A4h REQUEST SENSE 03h Possible Sense Keys REQUEST VOLUME ELEMENT ADDRESS BSh Request Volume Element Address header RESERVE 6 16h RESERVE 10 56h f TEST UNIT READY 00h WRITE BUFFER 3Bh Write Data Mode Download microcode and Download microcode and s save Mode Echo Buffer Mode Chapter 4 Messages Command Complete Extended messages Save Data Pointers Restore Pointers V TL2000 and TL4000 SCSI Reference 3 33 3 34 3 35 3 36 3 39 3 39 3 40 3 41 3 42 3 42 3 43 3 43 3 45 3 46 3 47 3 48 3 49 3 50 3 50 3 51 3 51 3 52 3 52 3 53 3 54 3 54 3 54 3 55 3 57 3 59 3 62 3 65 3 66 3 67 3 70 3 72 3 73 3 74
50. OSITION TO ELEMENT conflict PREVENT ALLOW MEDIUM REMOVAL prevent 0 allowed PREVENT ALLOW MEDIUM REMOVAL prevent 1 conflict READ BUFFER conflict READ ELEMENT STATUS curdata 0 conflict READ ELEMENT STATUS curdata 1 allowed READ ELEMENT STATUS dvcid 1 allowed RELEASE 6 allowed RELEASE 10 allowed REPORT SUPPORTED OPERATION CODES allowed REPORT TIMESTAMP allowed REQUEST SENSE allowed REQUEST VOLUME ELEMENT ADDRESS conflict Chapter 2 Library Features 2 3 RESERVE 6 conflict RESERVE 10 conflict SET TIMESTAMP conflict SEND DIAGNOSTIC conflict SEND VOLUME TAG conflict TEST UNIT READY conflict WRITE BUFFER conflict allowed Command received from SCSI initiators not holding the reservation should complete normally conflict Commands received from SCSI initiators not holding the reservation shall terminate the command with a RESERVATION CONFLICT status RMU Features The library is equipped with a Remote Management Unit By means of the RMU interface the media changer can be operated from a web based browser The RMU interface allows a user to monitor the media changers operation make configuration changes and perform media access commands When a user executes a medium access command through the RMU interface the media changer will enter the off line state When the media changer is off line the media changer will report Not Ready on the SCSI bus For an extensive description of the
51. PEN CLOSE IMPORT EXPORT ELEMENT 1Bh 3 47 X 1 P PERSISTENT RESERVE IN 5Eh 3 42 PERSISTENT RESERVE OUT 5Fh 3 45 POSITION TO ELEMENT 2Bh 3 48 PREVENT ALLOW MEDIA REMOVAL 1Eh 3 49 R READ BUFFER 3CH 3 50 READ ELEMENT STATUS B8h 3 53 RELEASE 17h 3 65 RELEASE 10 57H 3 66 REPORT SUPPORTED OPERATION CODES A3h 3 67 REPORT TIMESTAMP A3h 3 70 REQUEST SENSE 03h 3 76 REQUEST VOLUME ELEMENT ADDRESS B5h 3 79 RESERVE 16h 3 81 RESERVE 10 56H 3 82 X 2 TL2000 and TL4000 SCSI Reference restore pointers 4 2 RMU features 2 4 S save data pointers 4 2 SEND DIAGNOSTIC 1Dh 3 72 SEND VOLUME TAG B6h 3 73 Sense keys 7 1 SET TIMESTAMP A4h 3 75 T TEST UNIT READY 00h 3 83 W WRITE BUFFER 3Bh 3 84
52. Reference No Operation The NO OP message is sent from an initiator to inform the target that no message is valid in response to the target request for a message The media changer does not take any action in response to the No Operation message it accepts this message and continues processing the current command Message Parity Error The MESSAGE PARITY ERROR message is sent from the initiator to the target to indicate that one or more bytes in the last message received contained a parity error Bus Device Reset The BUS DEVICE RESET message is sent from an initiator to clear all commands data and status at the target When the target recognizes this message it aborts the command currently being executed proceeds to the BUS FREE state and executes a soft reset Identify The IDENTIFY messages are sent either by the initiator or by the target to establish or reestablish the logical connection path between an initiator and target for a particular logical unit Bit 7 6 5 4 3 2 1 0 Byte 0 Identify DiscPriv LUNTAR Reserved LUN Field Descriptions Bit 7 Identify This bit must be set to 1 to indicate this is the Identify message Bit 6 DiscPriv Disconnect Privlege This bit indicates whether the initiator supports the disconnect privelege as follows e 0 Disconnect is not allowed e 1 Disconnect is allowed The media changer always sets this bit to 0 Only initiators indicate if
53. Sense Key Additional Sense Code and Additional Sense Code Qualifier Valid 0 Res ponse code 70h Segment number 2 Filemark EOM ILI Reserved Sense Key 3 6 Information 7 Additional sense length OAh 8 11 Reserved 12 Additional sense code 13 Additional sense code qualifier 14 Reserved 15 SKSV C D Reserved BPV Bit Pointer Field descriptions Field Pointer Valid A Valid bit of one indicates that the Information field contains valid information as defined in the SCSI specification This bit is set to O 3 76 TL2000 and TL4000 SCSI Reference Response Code A value of 70h indicates a current error the report is associated with the most recently received command Response code value 71h deferred errors not implemented No other values are returned Segment Number This byte contains the number of the current segment descriptor if the Request Sense command is the response to a Copy Compare or Copy and Verify command It is always zero Filemark This bit is only used in sequential access devices It is always set to zero EOM The End Of Medium bit is for sequential access and printer devices This bit is always set to zero ILI An Incorrect Length Indicator indicates that the requested block length did not match the logical of the data on the medium This bit is always set to zero Sense Key ASC ASCQ
54. T EXPORT ELEMENT will return a Check Condition with sense data set to Medium Removal Prevented Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 1Bh 1 LUN Reserved 2 MSB Import Export Element Address 3 LSB 4 Reserved Action Code 5 Control Field descriptions Service Action By means of the Action Code the application client specifies the requested action for the I O Station specified by the Import Export Element Address Action Code Description 00h Open the Import Export element Oth 1Fh Reserved Import Export Element Address The Import Export Element Address field specifies the element address of the Import Export element Chapter 3 Supported SCSI Commands 3 47 POSITION TO ELEMENT 2Bh The POSITION TO ELEMENT allows the initiator to position the Medium Transport Element to a specific element address position This destination address can be a Storage Element Import Export Element or a Data Transfer Element address Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 2Bh 1 LUN Reserved 2 MSB Medium Transport Address 3 LSB 4 MSB Destination Address 5 LSB 6 Reserved 7 Reserved 8 Reserved Invert 9 Control Field descriptions Medium Transport Address This field contains either O or the currently valid element address of the Medium Transport Element D
55. TL4000 SCSI Reference Chapter 7 Sense Keys ASC and ASCQ Sense Key ASC ASCQ Description Recovered Error 01 OAh 00h Error log overflow 47h 00h SCSI parity error Not Ready 02 00h 17h Drive cleaning requested 04h 00h Cause not reportable 04h Oth In progress becoming ready scanning magazines etc 04h 02h Initializing command required 04h 03h Manual intervention required 04h 07h Operation in progress 04h 12h Offline 04h 83h Door open 04h 85h Firmware upgrade in progress 04h 87h The drive is not enabled 04h 88h The drive is busy 04h 89h The drive is not empty 04h 9Ah Drive fibre down 04h 8Eh The media changer is in sequential mode 30h 03h Cleaning in progress 3Bh 12h Magazine removed Medium Error 03 30h 00h Incompatible media installed 30h 03h Cleaning tape installed 30h 07h Cleaning failure 7 1 Sense Key ASC ASCQ Description Hardware Error 04 81h 80h Cannot initialize bar code reader 81h 81h No response from bar code reader 81h 82h No response from EEPROM 81h 83h Slave robotic generic problem 81h 84h Setting of gripper pic value failed 81h 85h Setting of slider pic value failed 81h 86h Setting of elevator pic value failed 81h 87h Setting of rotation pic value failed 81h 88h Setting of sled pic value failed 81h 89
56. TL4000 SCSI Reference qualifiers ASCQ is available in chapter 8 REQUEST VOLUME ELEMENT ADDRESS B5h The REQUEST VOLUME ELEMENT ADDRESS command is used to transfer the results of the SEND VOLUME TAG command Multiple REQUEST VOLUME ELEMENT ADDRESS commands may be used to retrieve the results of a single SEND VOLUME TAG command with the translate option Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code B5h 1 LUN VolTag Obsolete 2 MSB Element Address 3 LSB 4 MSB Number Elements to Report 5 LSB 6 Reserved 7 MSB 8 Allocation Length 9 LSB 10 Reserved 11 Control For each Send Volume Tag command the library shall report in response to a Request Volume Element Address command zero or more elements that match a volume tag template in element address order Once information for a given element address has been reported only higher element addresses shall be reported by subsequent Request Volume Element Address commands Field descriptions VolTag A VolTag bit of one indicates that the library shall report volume tag information A value of zero indicates that the volume tag information shall not be reported Element Address The Element Address field specifies a media changer element address whose interpretation depends on the Send Action Code field of the last successful Send Volume Tag command When the Send Action Code field was a transl
57. ailed 80h C6h Ping command did not reach target 80h C7h Cannot upgrade from USB 80h DOh ROM error 80h Dih RAM error 80h D2h NVRAM error 80h D3h CTC error 80h D4h UART error 80h D5h Display error 80h D6h Memory error 80h D7h Fatal system error 80h D8h dBase error 80h D9h No SCSI IC detected 80h DAh Different bar code labels 80h DBh External cooling fan failure 80h DCh Internal 12C bus error 82h FOh Over temperature problem 82h F1h Drive communication error 82h F2h Drive sled not present 82h F3h Drive broken needs repair 82h F4h Drive load timeout 82h F5h Drive unload timeout Chapter 7 Sense Keys ASC and ASCQ 7 3 Sense Key ASC ASCQ Description Illegal Request 05h 1Ah 00h Parameter length error 20h 00h Invalid command operation code 21h Oth Invalid element address 24h 00h Invalid field CDB 3Dh 00h SCSI invalid ID message 25h 00h Invalid LUN 2Ch 00h Command sequence error 26h 00h Invalid field in parameter list 26h Oth Parameter list error parameter not supported 26h 02h Parameter value invalid 26h 90h Wrong firmware image does not fit boot code 26h 91ih Wrong personality firmware image 26h 93h Wrong firmware image checksum error 39h 00h Saving parameters not supported 3Bh ODh Medium destination element full 3Bh OEh Medium source element empty 3Bh 11h Medium magazine not accessible 3Bh AOh Medium transfer
58. alid only if the SValid bit is 1 Primary Volume Tag Information When VolTag in the CDB was set the media changer will return a 36 byte PVolTag Identifier This identifier will contain the bar code label of the cartridge in the Medium Transport Element Next table contains a list of the ASC and ASCQ values that will appear in the Additional Sense Code and Additional Sense Code Qualifier fields of the Medium Transport Element descriptor if the element is in an abnormal state The Except field of an element descriptor indicates if an element is in an abnormal state ASC ASCQ Description Action 30h 03h Cleaning cartridge The element contains a cleaning cartridge 30h 83h Cleaning cartridge The element contains a cleaning cartridge without a readable bar without bar code label code label 83h 00h Element not yet scanned The media changer has not scanned this element up to now 83h Oth No bar code label The element contains a cartridge without a readable bar code label Storage Element Status Page 02h The Storage Element is the device that physically stores a cartridge in the library The number of available Storage Elements depends on the library model A Storage Element contains a cartridge when the Full bit is set Bit 7 6 5 4 3 2 1 0 Byte Subheader 0 Element Type Code 2h Storage Element 1 PVolTag AVolTag Reserved 2 3 Storage Element Descripto
59. alues to be returned in the mode pages 00b Report Current Values equal to default values if no pages previously saved 01b Report changeable values 10b Report Default Values 11b Report Saved Values equal to default values if no pages previously saved Page Code The page code defines which pages should be returned See next table A Initiator can request one or all mode sense pages Each response includes a four bytes for the Parameter List Header followed by the specified number of bytes for each page Page Code Subpage Number Page Name Page Description Code bytes 00h 00 4 Parity Page Provides a means to read out the setting for maximum number retries on parity errors OAh Oth 32 Control Extension Page Provides a means to read out the capabilities of the SET TIMESTAMP and REPORT TIMESTAMP commands 1Ch 00h 12 Tape Alert Page Allows the host to see what mechanism is used to report Tape Alert events 1Dh 00h 20 Element Address Provides a means to read the SCSI element Assignment Page address assignments and respective element ranges 1Eh 00h 4 Transport Geometry Page Provides a means to read the specifics about the Medium Transport Element 1Fh 00h 20 Device Capabilities Page Provides a means to read the library s capabilities 20h 00h 8 Event Filter Page Vendor Provides a means to read out the current Specific selected event filter settings 3 30 1L2000 and TL4000 SCSI Reference 3Fh
60. an element descriptor if the element is in an abnormal state The Except field of an element descriptor indicates if an element is in an abnormal state ASC ASCQ Description Action 30h 03h Cleaning cartridge The element contains a cleaning cartridge 30h 83h Cleaning cartridge The element contains a cleaning cartridge without a readable bar without bar code label code label 3Bh 12h Magazine removed Insert magazine Chapter 3 Supported SCSI Commands 3 61 83h 00h Element not yet scanned The media changer has not scanned this element up to now 83h Oth No bar code label The element contains a cartridge without a readable bar code label Data Transfer Element Status Page 04h The Data Transfer Element is the device that stores user data on the cartridges in the library aka Tape Drive A Data Transfer Element contains a cartridge when the Full bit is set Bit 7 6 5 4 3 2 1 0 Byte Subheader 0 Element Type Code 4h Data Transfer Element 1 PVolTag AVolTag Reserved 2 3 Data Transfer Element Descriptor Length 4 Reserved 5 7 Byte Count of Descriptor Data Available Element Descriptor 8 9 Data Transfer Element Address 10 Reserved Access Except Reserved Full 11 Reserved 12 Additional Sense Code 13 Additional Sense Code Qualifier 14 Obsolete Reserved IDValid Obsolete Reserved Obsol
61. ary Rear Panel Front of TL4000 Tape Library Slot 18 Slot 19 Slot 20 Drive 2 Slot 44 Slot 43 Slot 42 Slot 41 Slot 17 4113 4114 4115 257 4139 4138 4137 4136 4112 0x1011 0x1012 0x1013 0x101 0x102B 0x102A 0x1029 0x1028 0x1010 Slot 14 Slot 15 Slot 16 Slot 40 Slot 39 Slot 38 Slot 37 Slot 13 4109 4110 4111 4135 4134 4133 4132 4108 0x100D 0x100E 0x100F 0x1027 0x1026 0x1025 0x1024 0x100C Slot 10 Slot 11 Slot 12 Slot 36 Slot 35 Slot 34 Slot 33 Slot 9 4105 4106 4107 4131 4130 4129 4128 4104 0x1009 0x100A 0x100B 0x1023 0x1022 0x1021 0x1020 0x1008 Lower Left Magazine Drive 1 Lower Right Magazine Slot 7 Slot 8 Dcs cao Sot32 Slot 31 Slot 30 siot 29 VO Slot 3 4102 4103 0x100 4127 4126 4125 4124 18 0x1006 0x1007 0x101F 0x101E 0x101D 0x101C 0x12 Slot 4 Slot 5 Slot 6 Slot 28 Slot 27 Slot 26 Slot 25 VO Slot 2 4099 4100 4101 4123 4122 4121 4120 17 0x1003 0x1004 0x1005 0x101B 0x101A 0x1019 0x1018 0x11 Slot 1 Slot 2 Slot 3 Slot 24 Slot 23 Slot 22 Slot 21 VO Slot 1 4096 4097 4098 4119 4118 4117 4116 16 0x1000 0x1001 0x1002 0x1017 0x1016 0x1015 0x1014 0x10 Dedicated Cleaning Slot 2 6 TL2000 and TL4000 SCSI Reference Chapter 3 Supported SCSI Commands The media changer SCSI command set supports the following commands
62. ast reset of the device either by power cycling Bus Device Reset or SCSI Reset Note Only Log Sense Tape Alert page 2Eh supports PC being set to Current Threshold Values Page Code The Page Code field identifies which log page is being requested by the initiator If the page is not supported then the command terminates with a Check Condition status with the sense key set to ILLEGAL REQUEST and an additional sense code of INVALID FIELD IN CDB Supported pages are e 00h List of Supported Pages Page 07h Event Log Page e 2Eh Tape Alert Page e 30h Statistics Counter Page e 33h Error Log Page Parameter Pointer The Parameter Pointer field allows the host to specify at which parameter within a Log Page the requested data should begin This is not supported in any Log Sense page and should be set to 0 Chapter 3 Supported SCSI Commands 3 11 Allocation Length The Allocation Length field is used to inform the target how much space the initiator has allocated for data The target returns the bytes specified by allocation length Log Page Header format Each Log Sense page begins with a 4 byte header Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved Page Code 1 Reserved 2 3 Page Length Field descriptions Page Code The Page Code echoes the page code that was specified in the CDB Page Length The Page Length specifies the total number of bytes contained in this log page not including
63. ate the Element Address field gives the minimum element address to be reported by this command When the Send Action Code field is assert replace or undefine the Element Address field gives the particular element whose volume tag information was modified Number of Elements to Report The Number of Elements to Report field specifies the maximum number of elements to report of those that match the last Send Volume Tag command translate template Allocation Length If the Allocation Length is not sufficient to transfer all the element descriptors the library shall only return those descriptors whose complete contents fit within the allocation length Chapter 3 Supported SCSI Commands 3 79 Request Volume Element Address header Bit 7 6 5 4 3 2 1 0 First Element Address Reported LSB Number of Elements Reported LSB Reserved Send Action Code Byte Count of Report Available LSB Field descriptions First Element Address Reported This field indicates the element address of the element with the smallest element address found to meet the Send Volume Tag command s request Number of Elements Reported This field indicates the number of elements found The status for these elements is returned if the Allocation Length specified in the Request Volume Element Address command was sufficient Send Action Code The Send Action Code in the Request Volume Element Address Header returns
64. b Data about the requested SCSI command is not currently available All data after byte 1 is not valid A subsequent request for command support data may be successful 001b The device server does not support the requested command All data after byte 1 is undefined 010b Reserved 011b The device server supports the requested command in conformance with a SCSI standard 100h Reserved 10th The device server supports the requested command in a vendor specific manner 110h Reserved Chapter 3 Supported SCSI Commands 3 69 REPORT TIMESTAMP A3h The REPORT TIMESTAMP command requests that the library return the value of the logical unit s timestamp Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code A3 1 LUN Service Action OFh 2 Reserved 3 Reserved 4 Reserved 5 Reserved 6 MSB 7 Allocation Length 8 9 LSB 10 Reserved 11 Control Field descriptions Allocation Length The Allocation Length field specifies the number bytes the application client has allocated for the returned data The Timestamp shall not be affected by an I_T nexus loss or a logical unit reset The Timestamp is cleared on a hard reset event The REPORT TIMESTAMP parameter data format is shown in next table Bit 7 6 5 4 3 2 1 0 Timestamp parameter data length OAh Reserved Timestamp Origin Reserved Timestamp Reserved Field descriptions
65. by an optional 8 byte block descriptor after which the Mode Select pages are specified Bit 7 6 5 4 3 2 1 0 Byte 0 3 Parameter List Header 4 n Mode Select page s Parameter List Header If you send any page s using the Mode Select command to the media changer you must first send the Parameter List Header followed by the requested Mode Select page s The Parameter List Header has the following format Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved 1 Reserved 2 Reserved 3 Block Descriptor Length 0 If no Block Descriptor is to be sent to the media changer specify zero as Block Descriptor Length in the Parameter Header After the Parameter List Header the application client can send zero one or more Mode Select Pages to the media changer to configure any required parameter Parity page 00h By means of the Parity page the host can enable Parity retries and select the maximum number of retries Note this page will be stored in non volatile memory when the Host enables the SP bit in the CDB Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved SPF 0 Page Code 00h 1 Additional Page Length 02h 2 Reserved Parity Reserved 3 Maximum Parity retries Field descriptions 3 22 TL2000 and TL4000 SCSI Reference Parity By means of this field the host can enable parity retires Parity retries are by factory default enabled
66. by the media changer When cleared parity retries are disabled Maximum Parity retries This field indicates the maximum number of retries performed on a parity error during data out data in and message out phase The number of parity retries is by factory default set to 4 The maximum value allowed in the parity retry field is 7 Control Extension page 0Ah By means of this page the host can control SCSI features provided by the media changer Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved SPF 1 Page Code 0Ah 1 Subpage code 31h 2 MSB Page Length 1Ch 3 LSB 4 Reserved TCMOS SCSIP IALUAE 5 Reserved Initial Priority 6 31 Reserved Field descriptions SPF The Sub Page Format SPF bit is set to one to indicate this is a subpage TCMOS A TCMOS bit set to zero specifies that the timestamp shall not be changed by any method except those defined by this standard SCSIP A SCSI precedence SCSIP bit set to one specifies that the timestamp changed using a SET TIMESTAMP command shall take precedence over any other methods IALUAE The implicit asymmetric logical unit access enabled IALUAE bit must be set to zero The media changer does not allow implicit asymmetric logical unit access state changes Tape Alert Page 1Ch By means of this page the Host can specify the method of reporting Tape Alert events Currently only the polling method is supported
67. c Queuing is not supported set to 0 EncServ An Enclosure Services ENCSERV bit set to zero indicates that the media changer does not contain an embedded enclosure services component MultiP A MULTIP bit set to zero indicates that this SCSI target device has a single port and does not implement the multi port requirements MChanger This medium changer is not an attached medium changer Set to 0 Addr16 When Addr16 is set to 1 the media changer does support 16 bit wide SCSI addresses When set to 0 indicates that the media changer does not support 16 bit wide SCSI addresses WBus 16 When WBus16 is set to 1 the media changer transfers SCSI data over an 16 bit wide bus When WBus16 is not set data transfers are done over an 8 bit wide bus Sync When Sync is set to 1 data transfers are done in synchronous mode When Sync is not set data transfers are done in asynchronous mode Linked Linked Commands are not supported Set to 0 CmdQue Command Queuing For Fibre Channel this is returned as 1 indicating command queuing is supported For SCSI this is returned as 0 indicating no command queuing is supported 3 6 TL2000 and TL4000 SCSI Reference Vendor Identification Eight byte ASCII string This field is set to 0 1 2 3 4 5 6 7 B M Product Identification Sixteen byte ASCII string This field depends on the library model This field is set to 1 2 3 4 5 6 7 8 9 10
68. d and to report those assignments Mode Sense This page also defines the number of each type of element present in the subsystem configuration Chapter 3 Supported SCSI Commands 3 33 Bit 7 6 5 4 3 2 1 0 Byte 0 PS 1 SPF 0 Page Code 1Dh 1 Additional Page Length 12h 2 3 First Medium Transport Element Address 4 5 Number of Medium Transport Elements 6 7 First Storage Element Address 8 9 Number of Storage Elements 10 First Import Export Element Address 11 12 Number of Import Export Elements 13 14 First Data Transfer Element Address 15 16 Number of Data Transfer Element 17 18 Reserved 19 Reserved Field descriptions PS Parameter Saveable This field is set to 1 The media changer can save this page to non volatile memory First Medium Transport Element Address This field indicates the address of the accessor cartridge handler other than the default Medium Transport Element address of zero Number of Medium Transport Elements This field indicates the number of robotic cartridge handler within the library The library has one accessor cartridge handler set to 0001h First Storage Element Address This field indicates the starting address for the cartridge storage locations Number of Storage Elements This field indicates the total number of cartridge storage locations contained within the medium changer First Import Export Elem
69. dition Only n O1h events can be traced back Older events are lost Wait on first error The first occurred error will lead toa 02h temporary stop of the library Event Type Filter The Event Type Filter field determines which event types will be stored in the event log this field is an 8 bit mask Every bit in this mask represents an event type When a mask bit is set all events with the subsequent event type will be stored in the event log When a mask bit is cleared the event data of the subsequent event type will be discarded Event Type Mask Bit Cmd Oth Response 02h Event 04h Trace Data 08h Low Level Trace 10h Customer Events 20h Recovered Error 40h Hard Error 80h Chapter 3 Supported SCSI Commands 3 37 Event Module Filter The Trace Module Filter field determines which firmware module is allowed to store events This field is a 16 bit mask Every bit in this mask represents a firmware module When a mask bit is set the subsequent module is allowed to store its event data in the event log When a mask bit is cleared the event data of the subsequent firmware module will be discarded Source module ID of event Identifier Main 0001h Drive 0002h CDB Interpreter 0004h Accessor 0008h Trace 0010h OCP Input 0020h OCP Output 0040h SCSI 0080h SDCI 0100h Serial Monitor 0200h TNT Monitor 0400h Debug Monitor 0800h Test 1000h MN Server 200
70. dium Transport Element Address By means of this field the host can specify the address of the accessor cartridge handler Number of Medium Transport Elements By means of this field the host can specify the number of robotic cartridge handlers within the library If the Number of Medium Transport Elements is greater than the default value returned in the Mode Sense parameter data the library shall return a Check Condition First Storage Element Address By means of this field the host can specify the starting address for the cartridge storage locations Number of Storage Elements By means of this field the host can specify the number of cartridge storage locations If the Number of Storage Elements is greater than the default value returned in the Mode Sense parameter data the library shall return a Check Condition First Import Export Element Address By means of this field the host can specify the address of the import export element Number of Import Export Elements By means of this field the host can specify the maximum number of import export elements If the Number of Import Export Elements is greater than the default value returned in the Mode Sense parameter data the library shall return a Check Condition First Data Transfer Element By means of this field the host can specify the starting address of the installed tape drives Number of Data Transfer Elements By means of this field the host can specify the number of tape driv
71. dress or implicitly as address 0 Bit 7 6 5 4 3 2 1 0 Byte Subheader 0 Element Type Code 1h Medium Transport 1 PVolTag AVolTag Reserved 2 3 Transport Element Descriptor Length 4 Reserved 5 7 Byte Count of Descriptor Data Available Element Descriptor 8 9 Medium Transport Element Address Chapter 3 Supported SCSI Commands 3 55 Bit 7 6 5 4 3 2 1 0 Byte 10 Reserved Except Reserved Full 11 Reserved 12 Additional Sense Code 13 Additional Sense Code Qualifier 14 Reserved 17 SValid Invert Reserved ED Medium Type 18 Source Storage Element Address 19 20 Primary Volume Tag Information 55 field omitted if PVolTag 0 56 Reserved 59 field moved up if Primary Volume Tag Information field is omitted Field descriptions PVolITag Primary Volume Tag When set this flag indicates valid information in the Primary Volume Tag Information field This flag will be set when the VolTag field was set in the CDB AVolTag Alternate Volume Tag Always set to 0 Medium Transport Element Address This field provides the address of the Medium Transport Element of this changer device whose status is reported by this element descriptor block Except Exception An exception bit of 0 indicates the medium transport element is in a normal state If this bit is 1 information on the abnormal state may be available
72. e Mask Bit Cmd Oih Response 02h Event 04h Trace Data 08h Low Level Trace 10h Customer Events 20h Recovered Error 40h Hard Error 80h Event Module Filter The Trace Module Filter field determines which firmware module stores events This field contains a 16 bit mask Every bit in this mask represents a firmware module When a mask bit is set the subsequent module is allowed to store its event data in the event log When a mask bit is cleared the event data of the subsequent firmware module will be discarded The table below describes what bit belongs to which firmware module Source module ID of event Identifier Main 0001h Drive 0002h CDB Interpreter 0004h Accessor 0008h Trace 0010h OCP Input 0020h OCP Output 0040h SCSI 0080h SDCI 0100h Serial Monitor 0200h TNT Monitor 0400h Debug Monitor 0800h Test 1000h MN Server 2000h Network 4000h RMU 8000h 3 28 TL2000 and TL4000 SCSI Reference MODE SELECT 10 55h The MODE SELECT 10 command provides a means for the host to specify peripheral device parameters to the media changer Application clients should issue MODE SENSE prior to each MODE SELECT to determine supported pages page lengths changeable variables and to determine is the page is savable to NVRAM For documentation on the supported Mode Select pages refer to the Mode Select 6 description Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 55h LUN PF 1 Reserved
73. e logical library name for example _LL3 Firmware Built Information page COh The Firmware Built Information VPD page provides information identifying the current operating firmware version Bit 7 6 5 4 3 2 1 0 Byte 0 Peripheral Qualifier 0 Peripheral Device Type 8 1 Page Code COh 2 Reserved 3 Page Length 3Ch A 7 Reserved 8 11 Media changer Firmware Checksum in ASCII 12 Media changer Firmware Build Date in ASCII mm dd yyyy 35 36 Reserved 63 Note If an unsupported LUN was initially specified the Peripheral Qualifier will return 3h and the Peripheral Device Type will return 1Fh Chapter 3 Supported SCSI Commands 3 9 LOG SELECT 4Ch The LOG SELECT command provides a means for the host to clear the event log in the media changer This event log is maintained in the media changer internal NVRAM and is therefore resistant to power failures The only method to clear the event log is by means of aLOG SELECT command Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 4Ch 1 LUN Reserved PCR SP 0 2 PC Reserved 3 Reserved 4 Reserved 5 Reserved 6 Reserved 7 MSB Parameter List Length 8 LSB 9 Control Field descriptions PCR The Parameter Code Reset PCR bit is not supported Must be set to zero SP Saving log Parameters is not supported Must be set to zero Parameter List Length The Log Select
74. e mode set to Vendor Unique Mode is used to retrieve parameters stored in non volatile Ram The Buffer ID specifies the requested page The Buffer Offset field in the CDB is not supported for this mode Buffer ID Description Parameter List Length 00h Variables Setting page 002Eh 3 50 1L2000 and TL4000 SCSI Reference The following structure specifies the Variables Setting page A WRITE BUFFER command to this page is used to update the setting variables in NV RAM Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved 1 Additional Page Length 2Ch 2 Reserved 3 Reserved 4 MSB Current Setting Variables 42 bytes 45 LSB Note For a description of the possible Setting Variables see the table at the WRITE BUFFER command Descriptor Mode In this mode the media changer returns the Buffer Capacity of the specified Buffer ID in Data Mode If a not supported Buffer ID is specified the media changer will return zero as Buffer Capacity Next table specifies the Buffer Descriptor which is returned on a READ BUFFER command in Descriptor Mode Bit 7 6 5 4 3 2 1 0 Byte 0 Offset Boundard 0 1 MSB Buffer Capacity 3 LSB Field descriptions Offset Boundary The Offset Boundary field defines the byte alignment for the buffer The media changer only supports byte alignment so this value will be zero Buffer Capacity The Buffer Capacity field returns the size of the specifi
75. e not counters Parameter Definition Description DU LP 1 Minutes of Operation This 4 byte unsigned counter specifies the minutes of 0 0 operation Every minute the device is turned on this counter will increment 2 Number of Power ups This 4 byte unsigned counter specifies the number of 0 0 times the library is turned on 3 Number of Firmware This 4 byte unsigned counter specifies the number of 0 0 Updates times the internal flash code ROM has been updated 4 Number of Loader This 4 byte unsigned counter specifies the number of 0 0 Moves times the media changer performed a successful Move operation 5 Number of Event This 4 byte unsigned counter specifies the number of 0 0 Entries Event entries in the trace buffer 6 Number of Error This 4 byte unsigned counter specifies the number of 0 0 Entries Error entries in the trace buffer 7 Number of This 4 byte unsigned counter specifies the number of 0 0 Informational Entries Informational entries in the trace buffer 3 18 TL2000 and TL4000 SCSI Reference 8 Number of Warning This 4 byte unsigned counter specifies the number of 0 0 Entries Warning entries in the trace buffer 9 Number of This 4 byte unsigned counter specifies the number of 0 0 Configuration Change Configuration Change entries in the trace buffer Entries Error Log Page 33h This page consists out of a Page Header followed by a FIFO containing the last 64 error events This
76. ed Buffer ID buffer in bytes Note that this is the maximum size including the length byte The Read Buffer command in Data Mode supports Buffer ID zero Buffer ID zero can store up to 256 bytes The returned Buffer Capacity for Buffer ID zero is 000100h The uffer Capacity for all other Buffer ID values is set to 000000h Data Mode In this mode the library returns the information stored in the specified Buffer ID This mode is used to test SCSI bus data integrity in conjunction with the WRITE BUFFER command The Data Mode returns up to 256 bytes from the specified Buffer ID to the host The value in the Buffer Offset field may not exceed the length of the specified Buffer ID Only Buffer ID 00h is supported Potential Buffer overruns are detected and the command is rejected By means of a READ BUFFER command in Data Mode the host can retrieve the information sent by a WRITE BUFFER command in Data Mode The returned number of bytes is defined by the value stored in the Allocation Length field of the READ BUFFER CDB Chapter 3 Supported SCSI Commands 3 51 Bit 7 6 5 4 3 2 1 0 Byte O n data defined by previous Data Mode WRITE BUFFER command Echo Mode In this mode the library returns the same number of bytes of data as received in the prior Echo Mode WRITE BUFFER command from the same host If a prior Echo Mode WRITE BUFFER command did not complete successfully the Echo Mode READ BUFFER command shall return
77. ed to the RESERVE command that established the reservation Third Party Device ID This field provides the Device ID for the third party when 3rdPty bit is set 3 66 TL2000 and TL4000 SCSI Reference REPORT SUPPORTED OPERATION CODES A3h The REPORT SUPPORTED OPERATION CODES command requests information on commands the addressed logical unit supports An application client may request a list of all operation codes and service actions supported by the media changer Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code A3 1 LUN Service Action OCh 2 Reserved Reporting Options 3 Requested Operation Code 4 MSB Requested Service Action 5 LSB 6 MSB 7 Allocation Length 8 9 LSB 10 Reserved 11 Control Field descriptions Reporting Options The Reporting Options field specifies the information to be returned in the parameter data Reporting Option Description 000b A list of all operation codes and service actions supported by the logical unit shall be returned in the all_commands parameter data format The Requested Operation Code Cdb field and Requested Service Action Cdb field shall be ignored 001b The command support data for the operation code specified in the Requested Operation Code field shall be returned in the one_command parameter data format The Requested Service Action Cdb field shall be ignored If the Requested Operation
78. ent Address This field indicates the starting address of the first import export element Number of Import Export Elements This field indicates the total number of import export elements contained within the medium changer First Data Transfer Element This field indicates the starting address of the installed tape drives Number of Data Transfer Elements This field indicates the number of tape drives contained within the medium changer Transport Geometry Parameters page 1Eh The Transport Geometry Parameters Page is provided in the SCSI 2 command set to determine whether each medium transport element is a member of a set of elements in a robotic subsystem and if the 3 34 TL2000 and TL4000 SCSI Reference medium transport element is capable of media rotation Bit 7 6 5 4 3 2 1 0 Byte 0 PS 0 SPF 0 Page Code 1Eh 1 Additional Page Length 02h 2 Reserved Rotate 0 3 Member Number in Transport Element Set 0 Field descriptions PS Parameter Saveable This field is set to 0 The media changer cannot save this page to non volatile memory Rotate Rotation of media is not an implemented feature so the value returned for this field bit is O Member Number in Transport Element Set This field indicates the specific medium transport element in the system to apply this descriptor to The library has only one medium transport element so the value returned for this
79. er List Length field shall be zero when the Send Action Code is an undefine function The Parameter List Length shall be set to the length of the Send Volume Tag Parameter structure Send Volume Tag Parameter structure Bit 7 6 5 4 3 2 1 0 Byte 0 MSB Volume Identification Template 31 LSB 32 Reserved 33 34 MSB Minimum Volume Sequence Number 35 LSB 36 Reserved 37 38 MSB Maximum Volume Sequence Number 39 LSB Field descriptions Volume Identification Template The Volume Identification Template field specifies a search template for translate functions and the value of the new volume identification information for other Send Volume Tag command functions As a search template this field may contain the wildcard characters and The shall match any single character The shall match any string of characters When it appears in a template the remainder of the template at higher offsets in the field is not used For assert replace or undefined functions the wildcard characters may not be used Minimum Volume Sequence Number The Minimum Volume Sequence Number field specifies the new sequence number for the assert and replace functions For a translate this field specifies the least value in the volume sequence number field of the volume tag information that meets the search specification Maximum Volume Sequence Number The Maximum Volume Sequence Number field specifies the maxim
80. erred this is not an error condition CurData If the CurData bit is set the library shall return element status data without causing device motion If the CurData bit is zero the library may cause device motion to confirm element status data Chapter 3 Supported SCSI Commands 3 53 DVCID If the DVCID bit is set the media changer will return device identifiers for the Data Transfer element A DVCID bit of zero specifies that the device shall not return device identifiers Allocation Length This field specifies the number of bytes that the initiator has allocated for returned data Note that the Read Element Status command can be issued with an Allocation Length specified as 8 bytes the length of the status page header to determine the Allocation Length required to transfer all of the element status data that become available as a result of the command Element Status Data Data returned by the Read Element Status command is described below The Element Status Data consists of an 8 byte Header followed by one or more status pages for each element type The status pages are made up of an 8 byte sub header and one or more element descriptors one for each element address Header The data returned on a Read Element Status command always starts with the Header This Header reports the first element address the number of elements and the byte count of the report Bit 7 6 5 4 3 2 1 0 Byte 0
81. ervice actions that reserve the whole library or certain elements for the exclusive or shared use of a particular initiator The command uses other service actions to manage and remove such reservations The command shall be used in conjunction with the PERSISTENT RESERVE IN command and shall not be used with the RESERVE and RELEASE commands Initiators performing PERSISTENT RESERVE OUT service actions are identified by a reservation key provided by the application client An application client may use the PERSISTENT RESERVE IN command to obtain the reservation key for the initiator holding a persistent reservation and may use the PERSISTENT RESERVE OUT command to preempt that reservation Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 5Fh 1 LUN Service Action 2 Scope Type 3 Reserved 4 Reserved 5 Reserved 6 Reserved 7 MSB Parameter List Length 8 LSB 9 Control Field descriptions Service Action The following service actions are supported Code Name Description 00h Register Register a reservation key with the device server Oth Reserve Creates a persistent reservation having a specified Scope and Type 02h Release Releases the selected reservation for the requesting initiator 03h Clear Clears all reservation keys and all persistent reservations 04h Preempt Preempts persistent reservations from another initiator 05h Preempt and Abor
82. es installed If the Number of Data Transfer Elements is greater than the default value returned in the Mode Sense parameter data the library shall return a Check Condition Note The actual number of installed elements cannot be changed by the field values in the Element Address Assignment page Specifying a value other than the specified number returns a Check Condition status with the Sense Key set to ILLEGAL REQUEST Transport Geometry Parameters page 1Eh The Transport Geometry Parameters Page is provided in the SCSI 2 command set to determine whether each medium transport element is a member of a set of elements in a robotic subsystem and if the medium transport is capable of media rotation The initiator cannot change this information Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved SPF 0 Page Code 1Eh 1 Additional Page Length 02h 2 Reserved Rotate 0 3 Member Number in Transport Element Set 0 Field descriptions Rotate Rotation of media is not an implemented feature so the value returned for this field bit is O Member Number in Transport Element Set This field indicates the specific transport element in the system to apply this descriptor to The library has only one transport element so the value returned for this field is O Chapter 3 Supported SCSI Commands 3 25 Device Capabilities page 1Fh The Device Capabilities Page defines the characteristics of the element
83. estination Address This field contains the destination element address for the Position to Element command This destination address can be a Storage Element Import Export Element or a Data Transfer Element address Invert The library does not support medium rotation This value must be set to 0 3 48 TL2000 and TL4000 SCSI Reference PREVENT ALLOW MEDIA REMOVAL 1Eh The PREVENT ALLOW MEDIA REMOVAL commands enable or disable removing cartridges from the media changer A prevent condition inhibits the media changer to remove magazines and open the Import Export element A prevent condition of the media changer shall not affect an UNLOAD command issued to the tape drive Also a prevent condition shall not inhibit a front panel LOAD of a cartridge when the tape drive is empty A prevent condition is cleared when all initiators issue the Prevent Allow Medium Removal command with the Prevent field set to O allow cartridge removal The prevent condition is also cleared after a power on and after a SCSI Bus reset Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 1Eh 1 LUN Reserved 2 Reserved 3 Reserved 4 Reserved Prevent 5 Control Field descriptions Prevent When this bit is set opening of the Import Export element and unlocking of the magazine functions are disabled When the Prevent bit is cleared opening of the Import Export element and the unlocking of the magazine func
84. et a quick response from a Read Element Status command that may follow and is useful after a power failure if tape medium has been changed by an operator or if subsystem configuration has changed The library shall not return GOOD status until checking of all the elements is complete Bit 7 6 5 4 3 2 1 0 0 Operation Code 07h 1 LUN Reserved 2 Reserved 3 Reserved 4 Reserved 5 Control Field descriptions 3 2 TL2000 and TL4000 SCSI Reference INITIALIZE ELEMENT STATUS WITH RANGE 37h The INITIALIZE ELEMENT STATUS WITH RANGE command shall cause the media changer to check the specified elements for volume status and any other relevant status This command enables the initiator to get a quick response from a Read Element Status command that may follow and is useful after a power failure if tape medium has been changed by an operator or if subsystem configuration has changed Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 37h 1 LUN Reserved Fast Range 2 MSB Starting Element Address 3 LSB 4 Reserved 5 Reserved 6 MSB Number of Elements 7 LSB 8 Reserved 9 Control Field descriptions Range A Range bit of zero indicates that all element addresses shall be checked and that the Starting Element Address and Number of Elements fields are ignored A Range bit of one indicates that the series of elements beginning at
85. ete 15 SCSI Bus Address 16 Reserved 17 SValid Invert Reserved ED Medium Type 18 Source Storage Element Address 19 20 Primary Volume Tag Information 55 field omitted if PVolTag 0 56 Reserved Code Set 57 Reserved Identifier Type 58 Reserved 59 Identifier Length 60 MSB 93 Identifier Omitted if DVCID 0 in CDB LSB Field descriptions PVolTag Primary Volume Tag When set this flag indicates valid information in the Primary Volume Tag Information field This flag will be set when the VolTag field was set in the CDB 3 62 TL2000 and TL4000 SCSI Reference AVolTag Alternate Volume Tag The library does not support dual sided media Therefore the Alternate Volume Tag label is always set to zero even when the VolTag bit is set in the CDB Data Transfer Element Address This field provides the address of the data transfer element of this changer device whose status is reported by this element descriptor block Access When 1 indicates that access to the data transfer element by a medium transport element is allowed If O access to the data transfer element by a medium transport element is denied Note that a value of 1 in this bit may not be sufficient to ensure a successful operation Access is set to O if the drive has an error that would prevent it from being used For example if there is a communication failure between the medium changer and the tape drive Access is set to 0 Except An Excep
86. fer element The next table describes the values for the Medium Types Oh Unspecified th Data Medium 2h Cleaning Medium 3h Diagnostics Medium Ah WORM Medium 5h 7h Reserved Chapter 3 Supported SCSI Commands 3 63 Source Storage Element Address This field provides the address of the last storage element from which the tape cartridge was moved valid only if the SValid bit is 1 Primary Volume Tag Information When VolTag in CDB was set the media changer will return a 36 byte PVolTag Identifier This identifier will contain the bar code label of the cartridge mounted in the tape drive 0 1 2 3 4 5 6 7 n n n n n n t t The first six 6 characters are any combination of upper case A Z or 0 9 e g ABC 123 to identify the cartridge volume The last two 2 characters are determined by the cartridge media type i e L for LTO and 1 for tape cartridge generation or drive manufacturer unique identifier Code Set If the DVCID bit is set in the CDB the Code Set field is set to 2h indicating that ASCII values are returned If the DVCID bit in the CDB is set to 0 the Code Set is set to Oh Identifier Type If the DVCID bit is set in the CDB the Identifier Type is set to 1h This indicates that the identifier field contains an eight byte vendor identifier followed by vendor unique identifier information If the DVCID bit in the CDB is set to 0 the Identifier Type field is set to Oh Identifier Length
87. field is 0 Device Capabilities page 1Fh The Device Capabilities Page defines the characteristics of the element types used by this medium changer The initiator may use this information to determine which functions are permitted for the Move Medium Exchange Medium Read Attribute and Write Attribute commands Bit 7 6 5 4 3 2 1 0 Byte 0 PS 0 SPF 0 Page Code 1Fh 1 Additional Page Length 12h r Reserved DT VE ST MT 1 1 1 0 3 Reserved ACE VTRP S2C F MT gt RA Reserved MT gt DT MT gt I E MT gt ST MT gt MT 0 1 1 1 0 5 ST RA Reserved ST DT ST gt I E ST ST ST gt MT 0 1 1 1 0 I E2RA Reserved E2 gt DT E gt E E2ST I E gt MT 0 1 0 1 0 4 DT RA Reserved DT DT DT I E DT ST DT gt MT 0 1 1 1 0 8 11 Reserved m MT gt WA Reserved MTeDT MTel E MTeST MTeMT 0 0 0 0 0 m ST gt WA Reserved STeDT STel E STeST STeST 0 0 0 0 0 Chapter 3 Supported SCSI Commands 3 35 Bit 5 4 3 2 1 0 Byte a E2WA Reserved EeDT VEeV E EeST V EeST 0 0 0 0 0 i DT gt WA Reserved DTeDT DTel E DTeST DTeST 0 0 0 0 0 16 Reserved 19 Field descriptions PS DT IE ST MT S2C VTRP ACE XX gt YY XXeYY XX RA Parameters Savable This field is set to zero the media changer cannot write this page to non volatile memo
88. h Gripper blocked 81h 8Ah Slider blocked 81h 8Bh Elevator blocked 81h 8Ch Rotation blocked 81h 8Dh Sled blocked 81h 8Eh Cannot find gripper block 81h 8Fh Cannot find slider block 81h 90h Cannot find elevator block 81h 91ih Cannot find rotation block 81h 92h Cannot find sled block 81h 93h Gripper outside range 81h 94h Slider outside range 81h 95h Elevator outside range 81h 96h Rotation outside range 81h 97h Sled outside range 81h 98h No cartridge present sensor found 81h 99h No slider home sensor found 81h 9Ah No rotation home sensor found 81h 9Bh No sled position sensor found 81h 9Ch The range of gripper is wrong 81h 9Dh The range of slider is wrong 81h 9Eh The range of elevator is wrong 81h 9Fh The range of rotation is wrong 81h AOh The range of sled is wrong 81h Ath Open import export element failed 81h BOh Slave robotic controller response timeout 81h Bih NACK received from slave robotic controller 81h B2h Slave robotic controller communication failed 81h B3h Slave robotic controller urgent stop 81h B4h Cartridge did not transport completely 81h B5h Slave robotic controller does not respond on command 7 2 TL2000 and TL4000 SCSI Reference Sense Key ASC ASCQ Description Hardware Error 04 80h COh Network init continued 80h Cth Telnet interface 80h C2h Webserver 80h C3h EEPROM parameter 80h C4h Cannot init LAN card 80h C5h Write to EEPROM f
89. h which indicates that specified LUN is not supported RMB Removable Medium Bit Set to 1 Version The library complies to SPC 3 Set to 5 NormACA A NORMACA bit set to zero indicates that the device server does not support a NACA bit set to one in the control byte and does not support the ACA task attribute Chapter 3 Supported SCSI Commands 3 5 HiSup A hierarchical support HISUP bit set to zero indicates the SCSI target device does not use the hierarchical addressing model to assign LUNs to logical units Response Data Format This Standard Inquiry Data is in SCSI 2 format Set to 2 Additional Length The media changer uses this field to indicate the number of additional bytes of INQUIRY response data available SCCS The media changer does not contain an embedded storage array controller component Set to 0 ACC The ACC bit set to zero indicates that no access controls coordinator may be addressed through this logical unit TPGS The media changer does not support asymmetric logical unit access or supports a form of asymmetric access that is vendor specific Neither the REPORT TARGET GROUPS nor the SET TARGET GROUPS commands is supported 3PC A Third Party Copy 3PC bit set to zero indicates that the media changer does not supports third party copy commands such as the EXTENDED COPY command Protect A PROTECT bit set to zero indicates that the media changer does not support protection information BQue Basi
90. ield specifies which bit of the byte specified in the Field Pointer field is in error Field Pointer The Field Pointer field indicates which byte of the cdb or parameter data was in error Bytes are numbered starting from zero as shown in the tables describing the commands and parameters Possible Sense Keys Sense Key Name Description Oh NO SENSE Indicates that there is no specific sense key information to be reported th RECOVERED ERROR Indicates that the last command completed successfully with some recovery action performed by the device server 2h NOT READY Indicates that the logical unit addressed cannot be accessed Operator intervention may be required to correct this condition 4h HARDWARE ERROR Indicates that the device server detected a non recoverable hardware failure for example controller failure device failure parity error etc while performing the command or during a self test Chapter 3 Supported SCSI Commands 3 77 5h ILLEGAL REQUEST Indicates that there was an illegal parameter in the command descriptor block or in the additional parameters supplied as data for some commands 6h UNIT ATTENTION Indicates that the removable medium may have been changed or the target has been reset Bh ABORTED COMMAND Indicates that the device server aborted the command Note A list of possible sense keys with supported sense codes ASC and additional sense code 3 78 TL2000 and
91. in the Additional Sense Code and Additional Sense Code Qualifier fields Full A full bit value of one indicates that the medium transport element of the changer device contains a tape cartridge A value of 0 indicates the medium transport element is empty Additional Sense Code This field may provide specific information about an abnormal medium transport state valid only if the Except bit is 1 Additional Sense Code Qualifier This field may provide more detail about an abnormal medium transport state valid only if the Except bit is 1 SValid Source Valid When set to 1 indicates that the Source Storage Element Address field and the Invert bit information fields are valid When O indicates that the values in these fields are not valid Invert The library uses singe sided media and does not support inverting of the media The value reported for this field is 0 3 56 TL2000 and TL4000 SCSI Reference ED An ED bit of one indicates the element is disabled An ED bit value of zero indicates the element is enabled Medium Type The Medium Type field provides the type of medium currently present in the Media Transfer Element The next table describes the values for the Medium Types Oh Unspecified th Data Medium 2h Cleaning Medium 3h Diagnostics Medium Ah WORM Medium 5h 7h Reserved Source Storage Element Address This field provides the address of the last storage element from which the tape cartridge was moved v
92. it of 0 indicates the element is in a normal state If this bit is 1 information on the abnormal state may be available in the Additional Sense Code and Additional Sense Code Qualifier fields Access When set to 1 this field indicates that access to the import export element by a medium transport element is allowed If 0 indicates access to the import export element by a medium transport element is denied ExEnab An Export Enable bit of one indicates that the import export element supports movement of media into of the scope of the media changer device InEnab An InEnab bit of zero indicates that this element does not support import actions An Import 3 60 TL2000 and TL4000 SCSI Reference Enable bit of one indicates that the import export element supports movement of media out of the scope of the media changer device An InEnab bit of zero indicates that this element does not support export actions CMC Connected Media Changer bit of one indicates that exports are to a connected media changer A CMC bit of zero indicates that exports are to the operator and imports are from the operator OIR Operator Intervention Required bit of one indicates operator intervention is required to make the import export element accessible The OIR bit shall be set to zero if no operator intervention is required or if the Access bit is set to one Additional Sense Code This field may provide specific information about an abnormal import export eleme
93. l be stored in the event log Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved SPF 0 Page Code 20h 1 Additional Page Length 08h 2 Reserved 3 Reserved Log Mode 4 Reserved 5 Reserved Sez Mode 6 Reserved T Event Type Filter 8 9 Event Module Filter Field descriptions Log Mode The Log Mode controls the behavior of the event log system This mode can be set to the following different modes Log Mode Description Mode Off Logging is disabled 00h Continuous Logging has no stop condition Only n Oth events can be traced back Older events are lost Wait on first error The first occurred error will lead toa 02h temporary stop of the library Seq Mode Sequential Mode this bit indicates the operating Mode of the loader This mode is either Chapter 3 Supported SCSI Commands 3 27 Sequential or Random mode This mode cannot be changed by means of this page it can only be changed by means of the OCP Therefore the value set for this bit is ignored Event Type Filter The Event Type Filter field determines which event types will be stored in the event log This field is a 8 bit mask Every bit in this mask represents a event type When a mask bit is set all events with the subsequent event type will be stored in the event log When a mask bit is cleared the event data of the subsequent event type will be discarded Event Typ
94. l pages of additional data Each Vital Product Data page requires a separate INQUIRY command from the initiator An INQUIRY command is not affected by nor does it clear a Unit Attention condition Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 12h 1 LUN Reserved Obsolete EVPD 2 Page Code 3 MSB Allocation length 4 LSB 5 Control Field descriptions EVPD Enable Vital Product Data An enable vital product data EVPD bit of one specifies that the device server shall return the optional vital product data specified by the page code field Note If the EVPD bit is set to 0 the page code must be OOh Page Code This field contains the page number of the vital product data page to be returned for the INQUIRY command if the EVPD bit is set to 1 The following pages are supported e 00h Supported vital product pages e 80h Unit serial number page e 83h Device Identification page e COh Firmware build information page DOh Vendor Specific Page e FFh Vendor Use Only Allocation Length Specifies the number of bytes of inquiry information the media changer is allowed to return to the initiator during the command s data in phase Error status is not returned if the value in this field truncates the requested information Standard Inquiry Data Bit 7 6 5 4 3 2 1 0 Byte 0 Peripheral Qualifier 0 Peripheral Device Type 08
95. lization and the magazines are inserted the command returns Good Status Otherwise Check Condition is reported Due to power cycle code update etc it is possible to get multiple check conditions on TEST UNIT READY commands Bit 7 6 5 4 3 2 1 Byte 0 Operation Code 00h 1 LUN Reserved 2 3 4 5 Field descriptions Chapter 3 Supported SCSI Commands 3 83 WRITE BUFFER 3Bh Write Buffer is used with Read Buffer as a diagnostic function for testing the device data buffer DMA engine SCSI bus interface hardware and SCSI bus integrity Additional modes are provided for downloading and saving micro code and updating Vendor Unique settings Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 3Bh 1 LUN Reserved Mode 2 Buffer ID 3 MSB Buffer offset 5 LSB Parameter list length LSB oO Control Field descriptions Mode The Mode field is used to select the mode of operation The media changer supports the following values within this field 0010b Data 0100b Download microcode 0101b Download microcode and save 1010b Echo buffer If any non supported value is set the media changer terminates the command with a Check Condition status The sense key will be set to ILLEGAL REQUEST and the sense data to INVALID FIELD IN CDB Buffer ID When the Mode is set to Download micro code or Download micr
96. log data is helpful to determine the error history of the media changer Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved Page Code 33h 1 Reserved 2 3 Page Length 4 Up to maximum 64 Hardware Error event structures 64 97 bytes 6211 Field descriptions Page Code The Page Code echoes the page code that was specific in the LOG SENSE CDB Page Length The Page Length specifies the total number of bytes contained in this log page not including the four bytes of the header Error event structures This field contains a dump of the last error events Up to 64 error event structures are returned in this page Error Event Structure Every error event structure consists of two parts a header and its data The event header contains info about event type source timestamp and data length The event data returns specific info about the error event Appended to the event data is a error event description of maximum 80 ASCII characters with clear written text about the error event See description in next structure Bit 7 6 5 4 3 2 1 0 Byte 0 MSB Parameter Code 1 LSB 2 DU 0 DS 1 TSD 0 ETC 0 TMC 0 Reserved Reserved LP 0 3 Parameter Length 5Dh 4 Event type 80h 5 6 Source module ID of Error Event 7 10 Timestamp of Error Event 11 Reserved 12 Length of Error Event data n 13 MSB Chapter 3 Supported SCSI
97. lue of the timestamp in the format defined in above table The Time Stamp field should be the number of milliseconds that have elapsed since midnight 1 January 1970 UT If the high order byte in the TIMESTAMP field is greater than FOh the command shall be terminated with CHECK CONDITION status with the sense key set to ILLEGAL REQUEST and the additional sense code set to INVALID FIELD IN PARAMETER LIST On successful completion of a SET TIMESTAMP command the device server shall generate a unit attention condition for the initiator port associated with every _T nexus except the I_T nexus on which the SET TIMESTAMP command was received with the additional sense code set to TIMESTAMP CHANGED Chapter 3 Supported SCSI Commands 3 75 REQUEST SENSE 03h The REQUEST SENSE command tells the library to transfer sense data to the initiator Bit LUN Operation Code 03h Reserved Reserved Reserved Allocation Length Control Field descriptions Allocation length This field specifies the maximum sense data length the hosts wants to receive The sense data is valid for a check condition status returned on the previous command The sense data bytes are preserved by the library until retrieved by the REQUEST SENSE command from the same initiator If the media changer receives a REQUEST SENSE command it returns up to 18 bytes of Sense Data with the appropriate values in the
98. move tape cartridges from one element address to another specific element address The library can transfer cartridges between Storage Elements Import Export Elements and Data Transfer Elements Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code A5h 1 LUN Reserved 2 MSB Medium Transport Address 3 LSB 4 MSB Source Address 5 LSB 6 MSB Destination Address 7 LSB 8 Reserved 9 Reserved 10 Reserved Invert 11 Control Field descriptions Medium Transport Address This field specifies the medium transport element used to execute the Move Medium command This value can be set to either O or the currently valid Medium Transport Element address Source Address Element address from which the tape cartridge is being moved This can be a Storage Element address Import Export Element address or a Data Transfer Element address Destination Address Element address to which the tape cartridge is being moved This can be a Storage Element address Import Export Element address or a Data Transfer Element address Invert An Invert bit of one specifies that the medium should be inverted or rotated prior to depositing the medium into the destination element The library does not support medium rotation Therefore this field must be set to zero Chapter 3 Supported SCSI Commands 3 41 PERSISTENT RESERVE IN 5Eh The PERSISTENT RESERVE IN command is used to
99. n about the error event Error Event description This field describes the error event in ASCII text The returned string is zero terminated The maximum string length returned is 80 bytes 3 20 TL2000 and TL4000 SCSI Reference MODE SELECT 6 15h The MODE SELECT 6 command provides a means for the host to specify peripheral device parameters to the media changer Application clients should issue MODE SENSE prior to each MODE SELECT to determine supported pages page lengths changeable variables and to determine is the page is savable to NVRAM Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 15h 1 LUN PF 1 Reserved SP 2 Reserved 3 Reserved 4 Parameter list length 5 Control Field descriptions PF A PF bit of one indicates that the MODE SELECT parameters following the header and block descriptor s complies with the SCSI 2 specification The value must be set to 1 SP A Save Pages SP bit of zero indicates the media changer shall perform the specified MODE SELECT operation and shall not save any pages in nonvolatile ram An SP bit of one indicates that the media changer shall perform the specified MODE SELECT operation and shall save the current values to a nonvolatile RAM When a host has successfully issued the MODE SELECT CDB that changed settings in one of the Mode pages the media changer will raise a Unit Attention condition to every other host who has not issued this
100. n power shut down This page will not be affected by the LOG SELECT command nor by Firmware updates Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved Page Code 30h 1 Reserved 2 MSB Page Length 0048h 3 LSB 4 51 9 Statistics Counter structures 72 bytes Field descriptions Page Code The Page Code echoes the page code that was specific in the Log Sense CDB Chapter 3 Supported SCSI Commands 3 17 Page Length The Page Length specifies the total number of bytes contained in this log page not including the four bytes of the header Statistic Counter structure Bit 7 6 5 4 3 2 0 Byte 0 MSB Parameter Code n 1 LSB 2 DU 0 DS 1 TSD 0 ETC 0 TMC 0 Reserved Reserved LP O 3 Parameter Length 4 4 MSB 5 Statistic Counter Value 6 7 LSB Field descriptions Parameter Code The Parameter Code is a 2 byte value that uniquely identifies the parameter within the log It ranges from 1 9 DU Disable Update is set for any parameter that the Host cannot reset DS Disable Save The media changer has no support for SP bit Set to 1 TSD Target shall determine save method set to 0 ETC No threshold comparison set to 0 TMC No threshold supported set to 0 LP The List Parameter field is set to zero for parameters that are counters and set to one for parameters that ar
101. n set this bit indicates that the library does have a bar code reader When set to zero the library does not have a bar code reader ACE Auto Clean Enabled When set to one the library shall automatically clean the data transfer element When set to zero the library does not automatically clean the data transfer element 3 26 TL2000 and TL4000 SCSI Reference XXYY Where XX is a valid source and YY is a valid destination address If one of these bits is set to 1 it indicates that the medium changer device supports all Move Medium commands for which the source is element type XX and the destination is element type YY on the condition that the element addresses are valid XXeYY A one in these fields indicates that the medium can be exchanged by means of the Exchange Media command between elements of types XX and YY on the condition that the element addresses are valid XX RA These fields indicate the resources required to support the READ ATTRIBUTE commands for each element type XX The media changer does not support the READ ATTRIBUTE command therefore these fields are set to 0 XX WA These fields indicate the resources required to support the WRITE ATTRIBUTE commands for each element type XX The media changer does not support the WRITE ATTRIBUTE command therefore these fields are set to 0 Vendor Specific Event Filter page 20h By means of this page the host can configure the event logging mode and specify what event types wil
102. nd descriptor contains information about a single supported command CDB i e one operation code and service action combination or one non service action operation code The list of command descriptors shall contain all commands supported by the logical unit The All Commands parameter data format is shown in next table Bit 7 6 5 4 3 2 1 0 Byte 0 3 Command data length n 3 4 n Command Descriptors Each Command Descriptor contains information about a single supported command CDB The Command Descriptor format is shown in next table Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 1 Reserved 2 MSB Service Action 3 LSB 4 5 Reserved 6 MSB CDB Length 7 LSB The REPORT SUPPORTED OPERATION CODES one_command parameter data format contains information about the CDB and a usage map for bits in the CDB for the command specified by the Reporting Options Requested Operation Code and Requested Service Action fields in the REPORT SUPPORTED OPERATION CODES CDB Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved 1 Reserved Support 2 MSB CDB Size n 3 3 LSB 4 MSB CDB Usage Data n LSB Field descriptions Support The Reporting Options field specifies the information to be returned in the parameter data 3 68 TL2000 and TL4000 SCSI Reference Support Description 000
103. ned data on a Model Sense 10 command begins with an eight byte Mode Parameter Header followed by one or all Mode Sense pages as requested by the Page Code and Subpage Code fields Bit 7 6 5 4 3 2 1 0 Byte 0 7 Mode Parameter Header 8 n Mode Sense Page s Chapter 3 Supported SCSI Commands 3 39 Mode Parameter Header The returned data on a Mode Sense 10 command begins with an eight byte Mode Parameter Header This header has the following structure Bit 7 4 3 0 Byte 0 MSB Mode Data Length 1 LSB 2 Reserved 3 Reserved 4 Reserved 5 Reserved 6 MSB Block Descriptor Length 7 LSB Field descriptions Mode Data Length This field indicates the number of bytes of parameter information the media changer is returning as a result of this command excluding the Mode Data Length but including the six additional Mode Parameter Header bytes If a block descriptor was requested this count is also added to the Mode Data Length Block Descriptor Length When the DBD bit is set to zero the media changer may return an eight byte Block Descriptor When a Block Descriptor is returned the Block Descriptor Length will report 8 When the DBD bit is set the media changer will not return Block Descriptors and the block Descriptor Length will report O 3 40 TL2000 and TL4000 SCSI Reference MOVE MEDIUM A5h The Move Medium command is used to
104. nt state Additional Sense Code Qualifier This field may provide more detail about an abnormal import export element state SValid Source Valid When set to 1 indicates that the Source Storage Element Address field and the Invert bit information fields are valid When set to 0 indicates that the values in these fields are not valid Invert The library uses singe sided media and does not support inverting of the media The value reported for this field is 0 ED An ED bit of one indicates the element is disabled e g a magazine is not installed or has been logical disabled An ED bit value of zero indicates the element is enabled Medium Type The Medium Type field provides the type of medium currently present in the import export Element Next table describes the values for the Medium Types Oh Unspecified th Data Medium 2h Cleaning Medium 3h Diagnostics Medium Ah WORM Medium 5h 7h Reserved Source Storage Element Address This field provides the address of the last storage element from which the tape cartridge was moved valid only if the SValid bit is 1 Primary Volume Tag Information When VolTag in the CDB is set the Primary Volume Tag Information field provides identifying the unit of media in this element When VolTag in the CDB is not set this field will be omitted Next table contains a list of the ASC and ASCQ values that will appear in the Additional Sense Code and Additional Sense Code Qualifier fields of
105. o code and save the Buffer ID should be set to zero When the mode is set to Vendor Unique operation the Buffer ID indicates the requested page to update If the value of the Buffer ID is not supported by the specified Mode the command is rejected The target detects and rejects commands that would overrun the buffer Buffer Offset The Buffer Offset is required for the Download micro code and save modes and optional for the Vendor Unique and Data modes In all other modes the Buffer Offset must be set to zero Write Data Mode With this mode SCSI bus integrity can be tested in conjunction with the READ BUFFER command The host can by means of this mode send up to 256 bytes to the media changer This data can be retrieved by means of the READ BUFFER command The Buffer Offset specifies the offset within the buffer Potential buffer overruns are detected and will result into a Check Condition the sense key will be set to ILLEGAL REQUEST and the additional sense data to INVALID FIELD IN CDB 3 84 TL2000 and TL4000 SCSI Reference Download microcode and Download microcode and save Mode In these modes vendor specific micro code shall be transferred to the media changer and if the WRITE BUFFER command is completed successfully also shall be saved in a non volatile memory The downloaded code shall then be effective after each power cycle The firmware image can be sent in variable length blocks the buffer offset should be the incremental of the
106. obtain information about persistent reservation keys that are active within a library This command is used in conjunction with the PERSISTENT RESERVE OUT command Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 5Eh 1 LUN Service Action 2 Reserved 3 Reserved 4 Reserved 5 Reserved 6 Reserved F MSB Allocation Length 8 LSB 9 Control Field descriptions Service Action The following service actions are supported Code Name Description 00h Read Keys Reads all registered Reservation Keys Oth Read Reservation Reads the current persistent reservations 02h 1Fh Reserved Reserved Allocation Length By means of the Allocation Length field the application client specifies how much space has been allocated for the returned parameter list PERSISTENT RESERVE IN Parameter Data for Read Keys The format for the parameter data provided in response to a PERSISTENT RESERVE IN command with the Read Keys service action is shown below Bit 7 6 5 4 3 2 1 0 MSB Generation LSB MSB Additional length n 7 LSB Reservation Key List MSB First reservation key LSB 3 42 TL2000 and TL4000 SCSI Reference Bit 7 6 5 4 3 2 1 0 Byte n 7 MSB Last reservation key n LSB Field descriptions Generation See SPC 3 r23 Additional Length See SPC 3 r23
107. onditions as Informational Exception conditions therefore this field must be set to zero Report Count Test Flag Number Since test modes are not supported this field reports Report Count only But the media changer does not report Tape Alert events as Informational Exception conditions therefore this field must be set to zero Element Address Assignment page 1Dh The Element Address Assignment Page is used to assign new addresses to the elements of the medium changer via the Mode Select command and to report those assignments Mode Sense When requested the media changer can store new element addresses in NVRAM When stored in NVRAM these addresses will automatically become the default addresses after every power up The format of the element address assignment page is shown in the next table Note this page will only be stored in non volatile memory when the Host sets the SP bit in the CDB 0 Reserved SPF 0 Page Code 1Dh 1 Additional Page Length 12h First Medium Transport Element Address Number of Medium Transport Elements First Storage Element Address Number of Storage Elements Number of Import Export Elements First Data Transfer Element Address 2 3 4 5 6 First Import Export Element Address T 8 9 Number of Data Transfer Elements Reserved 11 Reserved 3 24 TL2000 and TL4000 SCSI Reference Field descriptions First Me
108. parameters are not supported 3 10 TL2000 and TL4000 SCSI Reference LOG SENSE 4Dh The LOG SENSE command allows the host to retrieve statistical information maintained by the media changer about its own hardware The statistical information is divided over several pages ALOG SENSE command will retrieve one of these pages Bit 7 6 5 3 1 0 Byte 0 Operation Code 4Dh 1 LUN Reserved PPC 0 SP 0 2 PC Page Code 3 Reserved 4 Reserved 5 MSB Parameter pointer 6 LSB 7 MSB Allocation length 8 LSB 9 Control Field descriptions PPC SP PC If Parameter Pointer Control bit is set the target terminates the command with Check Condition status The sense key is set to ILLEGAL REQUEST and an additional sense code of INVALID FIELD IN CDB Saving Log Parameters SP is not supported If the SP bit is set the command is terminated with Check Condition status with the sense key set to ILLEGAL REQUEST and an additional sense code of INVALID FIELD IN CDB The Page Control field defines the type of parameter value to be returned This field should either be set to 00b Current Threshold Values or 01b Current Cumulative Values If not the command is terminated with Check Condition status with the sense key set to ILLEGAL REQUEST and an additional sense code of INVALID FIELD IN CDB The Current Cumulative Values are the values computed since the l
109. pe XX The media changer does not support the READ ATTRIBUTE command therefore these fields are set to 0 XX gt WA These fields indicate the resources required to support the WRITE ATTRIBUTE commands for each element type XX The media changer does not support the WRITE ATTRIBUTE command therefore these fields are set to 0 Vendor Specific Event Filter page 20h By means of this page the host can read out the current selected event logging mode and determine what event types will be stored in the event log 3 36 TL2000 and TL4000 SCSI Reference Bit 7 6 5 4 3 2 1 0 0 PS 1 SPF 0 Page Code 20h Additional Page Length 08h Reserved Reserved Log Mode Reserved Seq Mode Reserved 1 2 3 4 Reserved 5 6 7 Event Type Filter 8 9 Event Module Filter Field descriptions PS Parameters Savable This field is set to one The media changer can write this page to non volatile memory Seq Mode This bit indicates the operational mode of the library When set to 1 the library is in Sequential Mode When set to 0 the library is in Random Mode Note this mode can only be changed by means of the OCP or Web User interfaces Log Mode The Log Mode determines the selected behavior of the event log system This mode can be set to the following different modes Log Mode Description Mode Off Logging is disabled 00h Continuous Logging has no stop con
110. r Length 4 Reserved 5 7 Byte Count of Descriptor Data Available Element Descriptor 8 9 Storage Element Address 10 Reserved Access Reserved Full Chapter 3 Supported SCSI Commands 3 57 Bit 7 6 5 4 3 2 1 0 Byte 11 Reserved 12 Additional Sense Code 13 Additional Sense Code Qualifier 14 Reserved 16 SValid Invert Reserved ED Medium Type Source Storage Element Address Primary Volume Tag Information field omitted if PVolTag 0 Reserved field moved up if Primary Volume Tag Information field is omitted Field descriptions PVolTag Primary Volume Tag When set this flag indicates valid information in the Primary Volume Tag Information field This flag will be set when the VolTag field was set in the CDB AVolTag Alternate Volume Tag Always set to 0 Storage Element Address This field provides the address of the Storage Element of this changer device whose status is reported by this element descriptor block Access When set to 1 this field indicates that access to the storage element by a medium transport element is allowed If 0 indicates access to the storage element by a medium transport element is denied Except Exception An exception bit of 0 indicates the element is in a normal state If this bit is 1 information on the abnormal state may be available in the Additional Sense Code and Additional Sense Code Qualifier fields
111. ry Data Transfer The value for this field is 1 Tape drives can store cartridges Import Export The value for this field is 1 The Import Export element can store cartridges Storage The value reported for this field is 1 The storage elements can store cartridges Medium Transport The value for this field is 0 The medium transport element cannot store cartridges SMC 2 Capabilities field is set to 1 This bit indicates that this page supports the new VRTP ACE XX RA and XX WA fields Volume Tag Reader Present When set to 1 this bit indicates that the library does have a bar code reader When set to zero the library does not have a bar code reader Auto Clean Enabled When set to one the library shall automatically clean the data transfer element When set to zero the library does not automatically clean the data transfer element Where XX is a valid source and YY is a valid destination address If one of these bits is set to 1 it indicates that the medium changer device supports all Move Medium commands for which the source is element type XX and the destination is element type YY on the condition that the element addresses are valid A one in these fields indicates that the medium can be exchanged by means of the Exchange Media command between elements of types XX and YY on the condition that the element addresses are valid These fields indicate the resources required to support the READ ATTRIBUTE commands for each element ty
112. s defined in the Read Element Status command If the Send Action Code field indicates a translate operation this field indicates the element types to be searched If the value is zero all element types are candidates for a translate operation If the Send Action Code does not indicate a translate this field shall be treated as reserved Element Address The Element Address field gives the media changer element address whose interpretation depends on the Send Action Code field When the Send Action Code field is a translate the Element Address field gives the starting element to be examined for the search operation When the Send Action Code field is assert replace or undefined the Element Address field gives the specific Element Address where the volume tag information for a volume is to be modified Send Action Code The Send Action Code field gives the function to be performed by this command as specified in next table Code Description Oh Translate search all defined volume tags th Translate search only primary volume tags 4h Translate search all defined tags ignore sequence numbers 5h Translate search primary tags ignore sequence numbers 8h Assert as the primary volume tag if tag now undefined Ah Replace the primary volume tag current tag ignored Ch Undefine the primary volume tag current tag ignored Chapter 3 Supported SCSI Commands 3 73 Parameter List Length The Paramet
113. s which store cartridges also referred to as storage elements e Import Export element allows the user to import or export an cartridge into from the inventory of the library e High Speed High Density tape drive also referred to as data transfer element e Magazines these cartridge carriers are used to hold cartridges in the library Magazines can be removed from the library Cleaning Cartridge Detection The media changer will recognize cleaning cartridges Once a cleaning cartridge is recognized the media changer will report its special status in the Read Element Status data Auto Clean Mode The media changer supports Auto Clean Mode Application clients must provide a place within the library to house the cleaning cartridge Some libraries may have a designated cleaning slot DCS where the cleaning cartridge may reside In the absence of a DCS the application client must reserve a slot element address that will not be seen by the host For details on reserving element addresses see the Configuration section of your Users Guide The cleaning cartridge can then be physically moved into that reserved element address to be available when called for by Auto Clean User Commanded Cleaning The media changer may be instructed to clean a tape drive by means of OCP or RMU commands When the medium changer is instructed to clean a drive the media changer will load a cleaning cartridge into the tape drive and return this cartridge to its
114. source element address once the cleaning operation is finished When no cleaning cartridge is available in the librarys inventory then the media changer will request the user to insert a cleaning cartridge After the cleaning operation is completed the media changer will post a message to the user about the status of the cleaning operation Control Modes The media changer can receive commands from the following interfaces SCSI RMU OCP and Console The default interface for receiving media access commands is the SCSI interface The media changer accepts media access SCSI commands when the media changer is on line The media changer is off line when a user sends a media access command from either the RMU OCP or Console interface 2 1 Immediately after the user command is finished the media changer switches to on line mode Note the media changer is continuous off line when it is configured into Sequential Mode The concept of control modes is introduced to explain the owner of the media changer If the media changer is on line then the SCSI bus has control of the loader When the media changer is in OCP Control mode the OCP has control of the media changer Described below are the possible control modes of the library e SCSI Control mode on line in which the media changer is controlled by a SCSI driver issuing commands to move cartridges between the existing elements This is the default control mode e Sequential mode off line in which
115. t the Primary Volume Tag Information field provides identifying the unit of media in this element When VolTag in the CDB is not set this field will be omitted Next table contains a list of the ASC and ASCQ values that will appear in the Additional Sense Code and Additional Sense Code Qualifier fields of an element descriptor if the element is in an abnormal state The Except field of an element descriptor indicates if an element is in an abnormal state ASC ASCQ Description Action 30h 03h Cleaning cartridge The element contains a cleaning cartridge 30h 83h Cleaning cartridge The element contains a cleaning cartridge without a readable bar without bar code label code label 3Bh 12h Magazine removed Insert magazine 83h 00h Element not yet scanned The media changer has not scanned this element up to now 83h Oth No bar code label The element contains a cartridge without a readable bar code label Import Export Element Status Page 03h Import Export elements are locations of volumes that are being inserted into or withdrawn from the media changer A volume in one of these elements is accessible by the Medium Transport Element and by an operator Bit 7 6 5 4 3 2 1 0 Byte Subheader 0 Element Type Code 3h Import Export Element 1 PVolTag AVolTag Reserved 2 3 Import Export Element Descriptor Length 4 Reserved 5 7 Byte Count of Descriptor Data Available Element
116. t Preempts persistent reservations from another initiator and aborts all tasks for all initiators registered with the specified registration key 06h Register and ignore existing Register a reservation key with the device server Key 07h 1Fh Reserved Reserved Type Scope The value in the Scope field specifies whether a persistent reservation applies to an entire logical unit or to an element Code Description Chapter 3 Supported SCSI Commands 3 45 Oh Persistent reservation applies to the full logical unit th Obsolete 2h Persistent reservation applies to the specified element 3h Fh Reserved Parameter List Length The Parameter List Length shall be set to the length of the Persistent Reserve Out Parameter List structure PERSISTENT RESERVE OUT Parameter List The format for the reservation descriptor is shown below There shall be a reservation descriptor for the persistent reservation if any present in the logical unit and a reservation descriptor for each element if any having a persistent reservation Bit 7 6 5 4 3 2 1 0 Byte 0 MSB Reservation Key 7 LSB 8 MSB Service Action Reservation Key 15 LSB 16 MSB Scope Specific Address 19 LSB 20 Reserved APTPL 21 Reserved 22 MSB Obsolete 23 LSB Field descriptions Reservation Key The Reservation Key field contains a value provided by the application
117. t bit of 0 indicates the data transfer element is in a normal state When set to 1 indicates an abnormal state information about an abnormal state may be available in the additional sense code and additional sense code qualifier bytes Full A Full bit value of 1 indicates that the data transfer element of the changer device contains a tape cartridge A value of 0 indicates the data transfer element is empty Additional Sense Code This field may provide specific information about the abnormal data transfer element state Additional Sense Code Qualifier This field may provide more detail about an abnormal data transfer element state IDValid The IDValid bit is set to one the SCSI Bus Address field reports the SCSI address of the Data Transfer Element SCSI Bus Address This field returns the SCSI Bus Address of the Data Transfer Element SValid Source Valid When set to 1 indicates that the Source Storage Element Address field and the Invert bit fields are valid When 0 indicates that the values in these fields are not valid Invert The library uses single sided media and does not support inverting of the media The value reported for this field is 0 ED An ED bit of one indicates the element is disabled e g the tape drive is not installed or has been logical disabled An ED bit value of zero indicates the element is enabled Medium Type The Medium Type field provides the type of medium currently present in the data trans
118. t the following Tape Alert Flags Parameter Flag name Type Description Code O1d Library C The media changer mechanism is having difficulty communicating with the Hardware A drive e Turn the library OFF then ON e Restart the operation If problem persists contact Technical Support 02d Library W There is a problem with the media changer mechanism If the problem Hardware B persists contact Technical Support 03d Library C The media changer has a hardware fault Hardware C e Make sure the media changer and drives are not being used by any host then reset the library from the front panel e If the problem persists contact Technical Support Chapter 3 Supported SCSI Commands 3 15 04d Library e Make sure the media changer and drives are not being used by any Hardware D host then reset the library from the front panel e If the problem persists contact Technical Support 13d Library Pick There is a potential problem with the cartridge loader picking a cartridge Retry from a drive or slot e No action needs to be taken at this time e If the problem persists contact Technical Support This flag is cleared when the next move command is received 14d Library Place There is a potential problem with the cartridge loader placing a cartridge Retry into a slot e No action needs to be taken at this time e If the problem persists contact Technical Support This flag is cleared when
119. te is set for any parameter that the Host cannot reset DS Disable Save The media changer has no support for SP bit Set to 1 TSD Target shall determine save method set to 0 ETC No threshold comparison set to 0 Chapter 3 Supported SCSI Commands 3 13 TMC No threshold supported set to 0 LP The List Parameter field is set to zero for parameters that are counters and set to one for parameters that are not counters Parameter Length This field specifies the total length of the event structure including the additional event data but without the 4 byte header Event type This field specifies the event type Possible event types are shown in table below Source module ID of event This field specifies the module ID that generated the event Possible source module ID s are listed below in a table Time of event in sec This field records the time the event took place Data type of event data This field specifies the format of the additional event data It is set to 00h when additional event data contains binary data or set to 01h when additional event data contains ASCII data Length of event data This field specifies the amount of event data The length specified in this field ranges between 0 and 114 bytes Event data The Event data field contains detailed information about the event The amount of event data ranges between 0 up to maximum 114 bytes Next table describes the possible Event types
120. the Send Action code of the last successful Send Volume Tag command Byte Count of Report Available This field indicates the number of available element status bytes that meet the CDB requirements This value does not adjust to match the Allocation Length field of the CDB and does not include the 8 byte Request Volume Element Address header 3 80 TL2000 and TL4000 SCSI Reference RESERVE 6 16h The RESERVE command allows the initiator to reserve the library After reserving the library only the INQUIRY LOG SENSE RELEASE REQUEST SENSE REPORT LUNS READ ELEMENT STATUS with CurData set and ALLOW MEDIUM REMOVAL commands are accepted from other initiators All other commands result in a Reservation Conflict status Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 16h 1 LUN Obsolete 2 Obsolete 3 Obsolete 4 5 Control Field descriptions Chapter 3 Supported SCSI Commands 3 81 RESERVE 10 56h The RESERVE and RELEASE commands provide the mechanism for contention resolution in multiple initiator systems The third party reservation allows logical units to be reserved for another specified SCSI device When a initiator reserves the library only INQUIRY LOG SENSE RELEASE REQUEST SENSE REPORT LUNS READ ELEMENT STATUS with CurData set and ALLOW MEDIUM REMOVAL commands are accepted from other initiators All other commands result in a Reservation Conflict status Bit
121. the specified Starting Element Address for the specified Number of Elements shall be checked If the Number of Elements field is zero the range checked shall start with the Starting Element Address and continue through the last element address on the unit Fast A Fast bit of one indicates that the specified elements shall be scanned for media presence only A Fast bit of zero indicates that the specified elements shall be scanned for all relevant status Element Address When the Range bit is set this field specifies the starting element address of the scan for the Initialize Elements with Range command When the Range bit is not set the information in this field is ignored Number of Elements When the Range bit is set this field specifies the number of elements to scan during the Initialize Elements with Range command The number of cartridges to scan should not exceed the maximum number of available storage slots taking in account the starting Element Address field When the Range bit is not set the information in this field is ignored Chapter 3 Supported SCSI Commands 3 3 INQUIRY 12h The INQUIRY command requests that information regarding parameters of the medium changer be sent to the initiator The media changer can provide two categories of data in response to an inquiry command Standard Inquiry Data and Vital Product Data Standard Inquiry Data contains basic data about the Medium Changer and Vital Product Data can comprise severa
122. they support disconnect Bit 5 LUNTAR Logical Unit Target This bit indicates the LUNs that you can access on this device This bit must be set to 0 to indicate that the Identify message is directed to a logical unit Bit 2 0 LUN Logical Unit Number The only supported logical unit number for the media changer is 1 If the LUN fiels is set to a other value than 0 the media changer returns Check Condition status to commands other than INQUIRY and REQUEST SENSE and the sense data is set to indicate that the logical unit is not supported Chapter 4 Messages 4 3 4 4 112000 and TL4000 SCSI Reference Chapter 5 Command Status Byte The media changer enters the status phase once per command and returns the following status bytes Status Value Description Good 00h This status indicates that the media changer successfully completed the command Check condition 02h An error condition occurred during command processing The REQUEST SENSE command responds with detailed error information Busy 08h The target is busy This status is returned when the device is unable to accept a command from an otherwise acceptable initiator The initiator should reissue the command at later time Reservation conflict 18h This status is returned by the media changer when a SCSI initiator attempts to access the media changer after it is reserved by another initiator with the RESERVE command 5 1 5 2 TL2000 and TL4000 SCS
123. tion operations that can cause delays are acceptable This bit is always set to zero DExcpt When this bit is set to zero the reporting method indicated by the MRIE field is used When this bit is set to one this indicates that the media changer shall disable all information exception operations ignoring the MRIE field In this mode the initiator must the Tape Alert log page Currently only MRIE mode 0 is supported so this bit is ignored Test Test modes are not supported therefore this field is set to 0 LogErr When this bit is set to 0 the media changer shall not log any Tape Alert events When this bit is set to 1 the media changer shall log Tape Alert events MRIE This field indicates the method used by the media changer to report informational exception conditions Currently only mode 0 is supported This means that Tape Alert flags can only be read by polling with the LOG SENSE command to the Tape Alert page Interval Timer The library does not report Tape Alert conditions as Informational Exception conditions therefore this field is set to zero Report Count Test Flag Number Since test modes are not supported this field reports Report Count only But the library does not support Informational Exception conditions therefore this field is set to zero Element Address Assignment page 1Dh The Element Address Assignment Page is used to assign addresses to the elements of the medium changer via the Mode Select comman
124. tions are enabled Chapter 3 Supported SCSI Commands 3 49 READ BUFFER 3Ch The READ BUFFER command is used in conjunction with Write Buffer as a diagnostic function for testing the media changer s data buffer and the SCSI bus integrity It is also used to read out Vendor Specific settings Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code 3Ch 1 LUN Reserved Mode 2 Buffer ID 3 MSB 4 Buffer offset 5 LSB 6 MSB 7 Allocation Length 8 LSB 9 Control Field descriptions Mode The Mode field is used to select the mode of operation The media changer supports the following values within the field 0001b Vendor Unique operation 0010b Data 0011b Descriptor 1010b Echo buffer 1011b Echo Descriptor If any non supported value is set the media changer terminates the command with a Check Condition status and an Illegal Request sense key set Buffer ID For all modes only buffer ID zero is supported Buffer Offset The Buffer Offset field is not supported and must be set to zero If the Buffer Offset field specifies an unsupported value the media changer shall return Check Condition status The sense key will be set to ILLEGAL REQUEST and the sense data to INVALID FIELD IN CDB Allocation Length The Allocation Length specifies the maximum number of bytes that the initiator has allocated for returned data Vendor Unique Mode A READ BUFFER command with th
125. ttempted that is invalid at this time Operation 27d Cooling FAN One or more fans inside the library have failed This flag is cleared when Failure all fans are working again 32d Unreadable The library was unable to read the barcode on a cartridge Bar Code Labels 3 16 TL2000 and TL4000 SCSI Reference e Informational suggestion to user e W Warning Remedial action is advised Performance of data may be at risk e C Critical immediate remedial action is required Tape Alert Flag structure Bit 7 6 5 4 3 2 1 0 Byte 0 MSB Parameter Code n 1 LSB 2 DU 0 DS 1 TSD 0 ETC 0 TMC 0 Reserved Reserved LP 0 3 Parameter Length 1 4 Value of Flag Set when bit 0 1 Field descriptions Parameter Code The Parameter Code is a 2 byte value that uniquely identifies the parameter within the log It ranges from 1 64 DU Disable Update is set for any parameter that the Host cannot reset DS Disable Save The media changer has no support for SP bit Set to 1 TSD Target shall determine save method ETC No threshold comparison TMC No threshold supported LP The List Parameter field is set to zero for parameters that are counters and set to one for parameters that are not counters Statistics Counter Page 30h This page consists of the Page Header followed three vendor specific counters The information in this page is stored in NV RAM o
126. types used by this medium changer The initiator cannot change this information Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved SPF 0 Page Code 1Fh 1 Additional Page Length 12h 5 Reserved DT VE ST MT 1 1 1 0 3 Reserved ACE VTRP S2C A MT RA Reserved MT2DT MT I E MT2ST MT gt MT 0 1 1 1 0 P ST RA Reserved ST DT ST I E ST ST ST gt MT 0 1 1 1 0 g I E2RA Reserved E2DT VESI E V E2ST I E gt MT 0 1 0 1 0 3 DT gt RA Reserved DT2DT DT I E DT ST DT gt MT 0 1 1 1 0 8 11 Reserved p MT gt WA Reserved MTeDT MTel E MTeST MTeMT 0 0 0 0 0 mr ST gt WA Reserved STeDT STeI E STeST STeST 0 0 0 0 0 i E gt WA Reserved EeDT VESI E V EeST V E ST 0 0 0 0 0 is DT gt WA Reserved DTeDT DTel E DTeST DTeST 0 0 0 0 0 16 Reserved 19 Field descriptions DT Data Transfer The value for this field is 1 Tape drives can store cartridges VE Import Export The value for this field is 1 The Import Export element can store cartridges ST Storage The value reported for this field is 1 The storage elements can store cartridges MT Medium Transport The value for this field is 0 The medium transport element cannot store cartridges S2C SMC 2 Capabilities field is set to 1 This bit indicates that this page supports the new VRTP ACE XX RA and XX WA fields VTRP Volume Tag Reader Present Whe
127. um number value in the volume sequence number field of the volume tag information that meets the search specification This field is ignored for assert replace and undefine functions 3 74 TL2000 and TL4000 SCSI Reference SET TIMESTAMP A4h The SET TIMESTAMP command requests the device server to initialize the timestamp in the media changer if the SCSIP bit is set to one or the TCMOS bit is set to one in the Control Extension mode page If the SCSIP bit is set to zero the SET TIMESTAMP command shall be terminated with CHECK CONDITION status with the sense key set to ILLEGAL REQUEST and the additional sense code set to INVALID FIELD IN CDB Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code A4 1 LUN Service Action OFh 2 Reserved 3 Reserved 4 Reserved 5 Reserved 6 MSB 7 Parameter List Length 8 9 LSB 10 Reserved 11 Control Field descriptions Parameter List Length The PARAMETER LIST LENGTH field specifies the length in bytes of the SET TIMESTAMP parameters that shall be transferred from the application client to the device server A parameter list length of zero indicates that no data shall be transferred and that no change shall be made to the timestamp The SET TIMESTAMP parameter data format is shown in next table Bit 7 6 5 4 3 2 1 0 Byte 0 3 Reserved 4 9 Time Stamp 10 Reserved 11 The TIMESTAMP field shall contain the initial va

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