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TZ877 Magazine and Cartridge Tape Subsystem Service Manual

1. SHR_X1023A_89 1 3 2 Rear Chassis The rear chassis contains the TZ87 tape drive power supply assembly handle motor assembly fan and controller module 1 3 2 1 TZ87 Tape Drive Using TZ87 density the TZ87 tape drive is a streaming tape drive that can use CompacTape III cartridges to store Up to 10 0 GB of data e Up to 20 0 GB of data at 2 1 compression Using TK85 or TK86 density up to 2 6 GB and 6 0 GB of data can be stored respectively 1 3 2 2 Power Supply Assembly The power supply assembly provides power to the rear chassis components and to the loader transfer assembly 1 6 Overview 1 3 2 3 1 3 2 4 1 3 2 5 Overview 1 3 Hardware Components Handle Motor Assembly The handle motor assembly lifts and lowers the drive s handle when cartridges are ready for insertion into or removal from the tape drive Fan The fan cools the entire TZ877 subsystem Controller Module The TZ877 magazine tape subsystem connects to the host system through a SCSI bus The physical interface is an electronic controller module in the rear chassis of the TZ877 subsystem The subsystem uses a serial communications path to pass commands messages data and error information between the controller module and the loader transfer assembly A second serial communications path exists between the controller module and the TZ87 tape drive 1 4 CompactTape Ill Cartridge The CompacTape III cartridge F
2. 0 0 a ccc ee eae A 7 A 6 Loading the Cartridge 0 0 cece eee eee A 9 Tables 1 1 Read Write Cartridge Compatibility with the TZ87 Tape Drive ol ieee are Dna ate e e ar a Bese acs hp Be Reh Wa any BN a Seek A 1 10 1 2 TZ877 Magazine Tape Subsystem Specifications 1 11 1 3 TZ87 Tape Drive Specifications 00 0c eee 1 13 2 1 TZ877 Operator Control Panel 00000 2 1 2 2 Results of Density Selection 0 0 0 0 cease 2 7 2 3 Loader Power on Self test 0 0 0 0 cc eee eee eee ee 2 20 3 1 Nondetectable FRU Failures 0 00 0 ce eeee 3 3 3 2 Common Failures Causes and Corrections 3 5 4 1 Field Replaceable Units and Related Procedures 4 1 4 2 Recommended Spares List 0 000 c eee eae 4 2 4 3 Service Aids oneru en Seba bed Revered Gis uals ean lele se doped 4 4 5 1 Program Data Patterns 0 0c ee nes 5 4 vii Preface This manual describes how to service the following tape products e TZ877 magazine and cartridge tape drive subsystem e TZ87 tape drive Intended Audience This manual is for use by Digital Services engineers 1 Overview 1 1 Overview The TZ877 magazine tape subsystem is an electromechanical device that performs automatic sequential tape operations The TZ87 tape drive which is a component of the subsystem has a maximum transfer rate of 1 25 Mbytes s When operating in compressed mode t
3. FRU Removal and Replacement Procedures 4 21 FRU Removal and Replacement Procedures 4 9 Removing and Replacing the Fan Figure 4 14 Removing the Operator Control Panel 3 SCREWS PLASTIC TAB SHR 0012 90 SHR X0147B 90 CPG NOTE For reinstallation note the airflow toward the rear and the orientation of the fan s power wires before disconnecting the wires 4 Remove the fan Replacement Procedure Reverse the preceding steps To ensure correct airflow be sure to reconnect the fan s power wires in their original orientation Verification Procedure 1 Power up the TZ877 subsystem 2 Observe the counterclockwise rotation of the fan 4 22 FRU Removal and Replacement Procedures FRU Removal and Replacement Procedures 4 10 Removing and Replacing the Power Supply Assembly 4 10 Removing and Replacing the Power Supply Assembly Removal Procedure 1 2 3 9 Open the rear door of the enclosure Power down the TZ877 subsystem From the rear of the enclosure push the TZ877 subsystem to the first mechanical stop From the side lift the latch to open the loader transfer assembly Remove the intermediate bezel by loosening the captive screws that secure it Figure 4 10 Disconnect the cable connections at the front of the power supply assembly Figure 4 15 Thread the cables into the cutouts Grasp the top cover of the power supply assembly to lift it You can push up on t
4. 3 2 3 2 Loader Open Latch 0 0 0 0c cece eae 3 9 3 3 Mechanical Ejection Lever 0 0 00 cece eee ee 3 10 4 1 TZ877 Magazine Tape Subsystem FRUs 4 3 4 2 First Mechanical Stop 0 0 eee eee eee 4 6 4 3 Manually Opening the Receiver 000000ee 4 7 4 4 Captive Screws Securing the Controller Module Tray 4 8 4 5 Rear Chassis with Components and Cables 4 9 4 6 Left Side View of the TZ877 Subsystem 4 10 vi 4 7 Loader Transfer Assembly Latch Position 4 12 4 8 Front of the Magazine Showing Cartridge Slot Numbers 4 13 4 9 Second Mechanical Stop 0 0 cc eee eee eee 4 15 4 10 TZ877 Subsystem Cables and Components 4 16 4 11 Handle Motor Assembly and Coupling Shaft 4 17 4 12 Dust Cover 2s fee fot kOe ea ees fe 8 bho a Se Sate ante 4 20 4 13 TZ87 Tape Path Takeup Leader Replaced 4 21 4 14 Removing the Operator Control Panel 4 22 4 15 Removing the Power Supply Assembly from the Rear CHASSIS berer rot FR MS Bs Bette haste Sada gk Kate totes 4 24 4 16 Key Lock Assembly 0 0 000 e eee ee eens 4 27 A 1 CleaningTape III Cartridge 0 0 00 eee eee A 1 A 2 TZ87 Front Panel 0 0 cee eee A 3 A 3 TZ877 Operator Control Panel 00000 A 4 A 4 Sliding the TZ877 Subsystem Toward You A 6 A 5 Loader Open Latch
5. Error indicators do not blink During hardware failures action is determined by the controller module 3 5 2 1 Clearing a Loader Fault When a loader fault occurs the Load Unload and Eject indicators are lit When you press the Load Unload button the TZ877 subsystem attempts to clear the error When you press the Eject button the receiver opens to let you access the magazine 3 6 Power Problems If the Power On indicator is not lit or the host system does not recognize the TZ877 subsystem e Verify that the subsystem is seated completely into the enclosure Power to the loader transfer assembly is disabled when the subsystem is positioned forward e Verify that the subsystem configuration is correct 3 7 Cartridge Motion Faults Occasionally a cartridge motion fault can occur in the elevator or drive mechanism A cartridge motion fault is indicated when e The Magazine Fault indicator on the OCP is lit e A cartridge cannot be loaded or unloaded e An unusual sound is heard in the motor This section describes how to remove cartridges from a loader transfer assembly without harming the loader or data It does not provide information on fault finding repair or maintenance of the loader 3 8 Troubleshooting Procedures Troubleshooting Procedures 3 7 Cartridge Motion Faults 3 7 1 Isolating Cartridge Motion Faults Most cartridge motion problems result from worn or damaged magazines or cartridges To
6. WRITE PROTECT SWITCH WRITE ENABLED WRITE PROTECTED ZKO 1217 04 DG 1 4 1 Cartridge Compatability Older CompacTape cartridges can be loaded for read or read write purposes into the TZ87 tape drive Use Table 1 1 to determine cartridge compatibility with the TZ87 drive Overview 1 9 Overview 1 4 CompacTape III Cartridge Table 1 1 Read Write Cartridge Compatibility with the TZ87 Tape Drive Cartridge Type Format Capacity Read Write Ability in the TZ87 CompacTape TK50 95 MBF CompacTape II TK70 296 MBF CompacTape III TK85 2 6 GBF CompacTape III TK86 6 0 GBF CompacTape III TZ87 10 0 GBF 20 0 GBF assumes 2 1 compression CompacTape ITI blank Read only Read only Read write in 85 mode Read write in 86 mode Read write in TZ87 modet Read write in 2 01 6 0 or 10 0 mode as selected lRead write backward compatible with drive of selected density 2Recording format can be changed to 2 0 6 0 or 10 0 TZ87 modes on a write from BOT 1 4 2 Selecting Density with the TZ877 You can select density by using the Density Select button on the TZ877 operator control panel The TZ87 tape drive defaults to using TZ87 format high density for all writes from beginning of tape BOT unless TK85 or TK86 formats have been selected either on the OCP or by the host If you use the OCP to select a format it overrides any format selected by the host When you append data
7. You can choose a density on the OCP Host selection is disabled Selection mode is manual Indicates all of the following 1 Tape was recorded in TK50 TK70 format 2 You chose to read the tape in TK85 format Indicates all of the following e Tape was recorded in TK85 format e You chose to read the tape in TK85 format Indicates one or all of the following e Tape was recorded in TK86 format e You chose to read write the tape in TK86 format Tape is recorded in another density You selected this density for a write from BOT Continued on next page Operating Procedures 2 3 Operating Procedures 2 1 Operator Control Panel Table 2 1 Continued TZ877 Operator Control Panel Button Indicator Color State Function TZ87 Yellow On Blinking On Compress Yellow On Off Density Override Yellow On Off default Blinking Indicates one or all of the following e Tape was recorded in TZ87 format e You chose to read write the tape in TZ87 format Tape is recorded in another density You selected this density for a write from BOT You selected compression mode Compression mode is disabled A density selection was set from the drive s front panel Density selection is under host control or automatic You are in density selection mode 2 1 1 Disabling the Operator Control Panel To disable the operator control panel Figure 2 1 set the mode select key t
8. 0 0 eee eee 3 6 3 5 1 1 Clearing a Magazine Fault 000005 3 7 3 5 2 Loader Fault Description 0 0 0 0 cee eee 3 7 3 5 2 1 Clearing a Loader Fault 0 000000 eae 3 8 3 6 Power Problems 2 4 wos Gea Mad eee teh 2 at Bea 3 8 3 7 Cartridge Motion Faults 0 0 0 0 cece ee eee 3 8 3 7 1 Isolating Cartridge Motion Faults 05 3 9 3 7 2 Recovering Cartridges 0 0 ccc cece eee eee 3 11 4 FRU Removal and Replacement Procedures 4 1 Recommended Spares and Service Aids 2005 4 1 4 2 Removal and Replacement Guidelines 4 4 4 4 3 Manually Opening the Receiver 0 000 c eee eee 4 5 4 4 Removing and Replacing the Controller Module 4 5 4 5 Removing and Replacing the Loader Transfer Assembly 4 9 4 6 Removing and Replacing the TZ87 Tape Drive 4 12 4 7 Removing and Replacing the TZ Takeup Leader 4 18 4 8 4 9 4 10 4 11 4 12 Removing and Replacing the Operator Control Panel Removing and Replacing the Fan 000 eee Removing and Replacing the Power Supply Assembly Removing and Replacing the Handle Motor Assembly Removing and Replacing the Mode Select Key Lock 5 TZ87 Diagnostic Utilities and Tests 5 1 5 1 1 5 1 2 5 1 3 5 1 4 5 2 5 3 5 3 1 5 3 2 5 3 2 1 5 3 3 5 3 4 5 3 5 5 3 6 5 3 7 5 4 5 4 1 5 4 2 5 4 3 5 4 4 5 4 5 PO
9. Pull out the leader 5 Use needlenose pliers to unhook the leader from the retaining hook in the center hub of the takeup reel Figure 4 13 4 18 FRU Removal and Replacement Procedures FRU Removal and Replacement Procedures 4 7 Removing and Replacing the TZ Takeup Leader Replacement Procedure 1 Slide the leader end into the takeup reel slot make sure the leader s orientation is correct Grab the leader end with the needlenose pliers and push the leader hole around the retaining hook in the reel Form the drive leader around the top of the tape path and push the leader down into the rollers between the rollers and plastic shield You cannot push the leader through the tape path Make sure the leader is not over the top flanges of the rollers Push the drive leader out so it is in front of the hook that slips into the rectangular hole of the leader end Make sure the new leader is installed correctly Figure 4 13 Replace the dust cover and the metal module clip Replace the TZ87 drive into the enclosure Refer to the previous section 4 8 Removing and Replacing the Operator Control Panel Removal Procedure 1 2 3 4 6 T Open the rear door of the enclosure Power down the TZ877 subsystem Close the rear door of enclosure After opening the receiver grasp the top front bezel and slide the subsystem to its first mechanical stop Remove the three screws Figure 4 14 that secure the operator contro
10. 2 4 2 3 2 3 1 2 3 2 2 3 3 2 3 4 2 4 2 4 1 2 4 2 2 5 2 5 1 2 5 2 2 5 3 2 5 4 Opening the Receiver 1 0 0 cee ee ees 2 9 Ma Pa Zine EE ek ak Se ee ee SES 2 10 Removing the Magazine from the Receiver 2 10 Inserting Cartridges into the Magazine 2 12 Removing a Cartridge from the Magazine 2 14 Restoring the Magazine to the Receiver 2 14 Mode Select Key wus ccs fyece wie waa ES ete kee wa an SS 2 16 Operating Modes 0 0 0 eee ee eee 2 16 Service Mode sse cecswc ce Sg auc EE tore Wid Eea ea kip Mone 2 17 Initialization and Power On Self Testing 2 17 Power On Self Test 0 0 cee eee 2 19 Initialization of the Loader Transfer Assembly 2 21 Completion of Controller Initialization 2 21 TZ87 Tape Drive Power On Self Test 0 2 22 3 Troubleshooting Procedures 3 1 Avoiding Basic Problems 0 cee cee eens 3 1 3 2 Backup Operation Failure 0 0 0c eens 3 2 3 3 Nondetectable FRU Failure 0 000 cece eens 3 3 3 4 Error Conditions i 02 sscee tie beds we Pe R IA Cae ee wes 3 4 3 4 1 Detecting Common Failure Influences 3 4 3 4 2 Soft ETOS ror 46 4 3ds ek eek ee Sa eee ee es 3 4 3 4 3 Common Failures 0 eee eee ees 3 5 3 5 Magazine and Loader Faults 0 0 0 eae 3 6 3 5 1 Magazine Fault Description
11. 2 4 2 Service Mode Use Service mode to perform head cleaning and servicing procedures To unlock the TZ877 subsystem from its enclosure and remove it from its normal operating position set the Mode Select key to Service mode The receiver is unlocked and can be opened On newer models the rear ship lock must be unscrewed first Newer models have one mechanical stop associated with Service Mode Figure 2 7 older models have two stops Figure 2 8 On models with two mechanical stops the first stop lets you pull the front chassis forward from the enclosure to e Remove a faulty loader transfer assembly e Remove a faulty operator control panel e Remove a faulty power supply assembly e Perform the head cleaning procedure Press the first stop to access the second stop You can then pull the rear chassis forward from the cabinet This position provides access to the following field replaceable units FRUs e Tape drive e Handle motor assembly e Controller module For specific instructions on how to access the internal assemblies of the TZ877 subsystem see Chapter 3 2 5 Initialization and Power On Self Testing This section describes initialization of the subsystem and the component power on self tests POSTs that occur when you power on the TZ877 subsystem At power on the following components run simultaneous but separate self tests e Loader transfer assembly Operating Procedures 2 17 Operating Procedures 2 5 In
12. Disconnect the internal DSSI or SCSI cable Figure 4 5 from the controller module Loosen the screws that secure the bulkhead connector Figure 4 4 Remove the cable assembly from the rear of the tray Press the first mechanical stop to access the second mechanical stop Figure 4 9 Lift the latch to open the loader transfer assembly Loosen the four captive screws that secure the drive at the right Figure 4 7 and left Figure 4 6 sides of the rear chassis Each screw is recessed inside a nut Do not try to loosen these nuts FRU Removal and Replacement Procedures 4 13 FRU Removal and Replacement Procedures 4 6 Removing and Replacing the TZ87 Tape Drive 13 14 15 16 Slide the plastic tab on the handle motor assembly about one inch to the right Figure 4 10 You may have to move the drive slightly to release the plastic tab Rotate the plastic tab toward the handle motor assembly Pull the drive toward you almost fully out of the rear chassis Disconnect the power cable and the drive communications cable Figure 4 3 from the rear of the drive Replacement Procedure 1 2 Slide the replacement drive halfway into the rear chassis Connect the power cable and drive communications cables to the rear of the drive Slide the drive into the rear chassis Align the drive handle shaft with the handle motor coupling shaft Figure 4 11 Carefully position cables when sliding the drive into the chass
13. apply labels to the top or bottom of tape cartridges This can cause a cartridge to jam in the magazine NOTE Never move the metal tab on the left side of the magazine slot in an attempt to remove the cartridge This will cause a magazine fault 2 3 4 Restoring the Magazine to the Receiver To restore the magazine to the receiver 1 Slide the magazine into the receiver Since the magazine is slotted you can restore it only in the correct orientation 2 Push the receiver closed Be sure it is fully closed before proceeding 2 14 Operating Procedures Operating Procedures 2 3 Magazine Figure 2 6 Removing a Cartridge from the Front of the Magazine BACK OF _ MAGAZINE Ea NOTE Push tape in until a click is heard FRONT OF SLOT MAGAZINE NUMBERS 0 6 ZKO 1217 06 DG Operating Procedures 2 15 Operating Procedures 2 4 Mode Select Key 2 4 Mode Select Key The Mode Select key Figure 2 1 locks the loader transfer assembly into the enclosure and also locks the magazine into the receiver 2 4 1 Operating Modes The following modes are for operational use OCP Disabled mode Automatically loads and unloads cartridges as necessary during backup procedures When you insert the magazine into the receiver and close the receiver the loader scans the magazine The first cartridge in the magazine automatically loads into the drive Operations stop if you are copying data to
14. executes in about five seconds 5 4 2 TESTO2 SCSI Level 2 Test This test has two modes of operation default and non default Default mode writes then reads fifty 32 768 byte records Non default mode has the host providing runtime parameters A statistical report and any errors are passed on in the REQUEST SENSE data Default mode executes in about five minutes 5 4 3 LTSTO09 Loader Streaming Write Read Test This test cycles and loads all cartridges that are in sequence in the magazine It writes and then reads until EOT is done on all cartridges 5 4 4 LTST11 Loader Read All Test This test cycles and loads all cartridges that are in sequence in the magazine It reads until LEOT is done on all cartridges 5 4 5 Retry Algorithm The diagnostics utilize the subsystem s retry algorithms as implemented by the drive and controller firmware All hard write errors and undetected read errors are considered to be fatal 5 6 TZ87 Diagnostic Utilities and Tests A Head Cleaning Procedure The TZ877 magazine tape subsystem uses the CleaningTape III cartridge Figure A 1 for cleaning the read write head in the tape drive The CleaningTape III cartridge is a yellow plastic cartridge containing 1200 feet of 1 2 inch magnetic particle MP cleaning tape You can use the CleaningTape III cartridge about 20 times before it expires Figure A 1 CleaningTape Ill Cartridge SHR_X1020E_89 Head Cleaning Procedure A 1 Head Cle
15. is also done by the diagnostic server The diagnostic server handles all communication within the controller When a test is complete the diagnostic server compiles statistics and then either sends them to the diagnostic terminal server for transmission to the diagnostic terminal or to the SCSI port for retrieval by the host 5 3 2 Diagnostic Terminal Server The diagnostic terminal server is a separate task that verifies all diagnostic terminal communication The SCSI port is also a separate task and verifies all communications with the host When you issue a ds command to the diagnostic terminal server or when the SCSI port receives a Send Diagnostic command from the host it prompts the diagnostic server to search the diagnostic test directory If the program is found the diagnostic server attempts to gain exclusive access to the subsystem by issuing an online command with exclusive access requested If this is successful the program starts All programs run to completion or until you issue a dk command 5 3 2 1 Data Patterns The following table displays program data patterns TZ87 Diagnostic Utilities and Tests 5 3 TZ87 Diagnostic Utilities and Tests 5 3 Test Descriptions Table 5 1 Program Data Patterns Pattern Name Data in Hex 0 Rotate Use different pattern for each file 1 All 0s 00 00 00 00 00 2 2F FF FF FF FF FF 3 Alternating 1s and 0s 55 5A AA A5 55 5A AA A5 4 Marching 1 01 02 04 08 10 20 40 80 5 Marching 0
16. rear of the enclosure slide the TZ877 subsystem forward to the first mechanical stop Figure 4 2 Squeeze the mechanical ejection lever Figure 4 3 to open the receiver 4 4 Removing and Replacing the Controller Module Removal Procedure TZ Models Only OF OU RS N SROs gt Remove the subsystem from the enclosure Remove the controller module from the plastic locking tabs Disconnect the internal SCSI cable from the controller module Figure 4 5 Disconnect the power cables Press the locking tabs to release the module Disconnect the remaining cables and remove the module FRU Removal and Replacement Procedures 4 5 FRU Removal and Replacement Procedures 4 4 Removing and Replacing the Controller Module Figure 4 2 First Mechanical Stop FIRST MECHANICAL STOP Ww WALS IRON Mf CXO 2461B SHR_X1106B_89 Replacement Procedure TZ Models Only 1 Connect the loader transfer assembly communications cable Figure 4 6 and the drive communications cable before setting the controller module into the module tray 4 6 FRU Removal and Replacement Procedures FRU Removal and Replacement Procedures 4 4 Removing and Replacing the Controller Module Figure 4 3 Manually Opening the Receiver DRIVE COMMUNICATIONS CABLE SHIPPING SECOND RESTRAINT MECHANICAL FIRST STOP MECHANICAL k MECHANICAL EJECTION LEVER SHR 0
17. repeats you have a drive hardware failure or more than one bad cartridge physically damaged or bad calibration tracks Attempt recovery by pressing the Unload button on the drive or manually remove the cartridge from the drive Section 2 2 3 1 Troubleshooting Procedures 3 5 Troubleshooting Procedures 3 5 Magazine and Loader Faults 3 5 Magazine and Loader Faults Error indications fall into two main categories e Magazine Fault An operator correctable condition in most cases indicated by the Magazine Fault indicator being lit e Loader Fault A condition indicated by the Loader Fault indicator being lit It most likely requires service from Multivendor Customer Services 3 5 1 Magazine Fault Description A magazine fault is indicated by the Magazine Fault and Eject LEDs being lit A magazine fault can occur when 1 A cartridge has been removed from the magazine incorrectly 2 A cartridge was manually unloaded from the drive 3 A cartridge that was loaded into the drive by the loader was manually unloaded and put back into the magazine 4 A cartridge was manually inserted into the drive NOTE This can only occur if the loader has been opened requiring service intervention This cannot occur under normal operation Detecting cases 1 2 and 3 These can be detected when the Magazine Fault indicator is lit and slot indicators 0 and 5 are lit Never remove a cartridge from the magazine by m
18. the cleaning cartridge automatically returns to the magazine Press the Eject button to remove the magazine Remove the cleaning cartridge from the magazine and replace the CompacTape III cartridge in the magazine A 10 Head Cleaning Procedure B TZ87 Removal and Replacement Procedure This appendix describes the removal and replacement procedure for the TZ87 subsystems from tabletop enclosures B 1 Preliminary Steps To begin the removal and replacement procedure 1 Use all ESD procedures 2 Disconnect power 3 Disconnect external cables from the rear of the panel B 1 1 Removing the Enclosure Top To remove the enclosure 1 Remove the two screws at the rear of the enclosure 2 Lift the rear of the enclosure and remove the top B 1 2 Removing the Fan To remove the fan 1 Disconnect the internal cables 2 Remove the four screws that secure the fan B 1 3 Removing the SCSI ID Switch and Cable To remove the SCSI ID switch and cable 1 Disconnect the SCSI ID cable from the controller module 2 Remove the two screws inside the rear panel that secure the SCSI ID switch assembly to the panel TZ87 Removal and Replacement Procedure B 1 TZ87 Removal and Replacement Procedure B 1 Preliminary Steps B 1 4 Removing the Internal SCSI Bus Cable To remove the internal SCSI bus cable 1 Disconnect the internal SCSI bus cable from the controller module 2 Remove the four screws at the rear panel that secure the two SCSI bus connec
19. the external SCSI cable unless the system is powered down Doing so while the system is running can cause system failure and possible loss of customer data To maintain stability slide only one TZ877 subsystem at a time from the enclosure On newer models the screws in the back of the subsystem must be removed before the subsystem can slide out NOTE During shipment the subsystem is locked into the enclosure by a shipping restraint Be sure to disengage this restraint Figure 4 3 before removing the subsystem 4 4 FRU Removal and Replacement Procedures 10 11 FRU Removal and Replacement Procedures 4 2 Removal and Replacement Guidelines When sliding the subsystem in or out of the enclosure be sure that the connector wires and cables are not tangled or snagged Do not misplace the screws that are not captive Figure 4 4 They are metric and not readily available Use the power on self test POST and local diagnostic programs to diagnose most FRUs For nondiagnostic detectable failures see the subsystem and drive specific problem resolution sections Use the field test cartridge when verifying the TZ877 subsystem after the removal and replacement procedures are complete 4 3 Manually Opening the Receiver If the receiver does not open when you press the Eject button during a removal or replacement procedure follow these steps 1 2 Open the rear door of the TZ877 subsystem enclosure From the
20. the front panel Density Select button Using the selection button always overrides other methods Use a host selection assuming operating system support If you do not use the Density Select button host selection is used Use the native format If you do not use an OCP or host selection then the default TZ877 format is used How to Select Density To select density with the TZ877 1 2 Press the Load Unload button to load the cartridge into the drive Use one of the selection methods to select the desired format 2 0 6 0 or 10 0 Issue a command that will cause a write from BOT for example from VMS the INITIALIZE command After calibration completes the yellow Tape in Use indicator remains lit and one of the yellow Tape Density indicators lights to indicate current tape density You can use the Density Select button at any time not just after loading a tape A new selection will not take place until you do a write from BOT The controller remembers the command you gave until you do one of the following e Change the selection you made Unload the tape When you unload the tape the controller forgets the density selection e Eject the magazine from the loader Table 2 2 Results of Density Selection lf Then You did not use the The LEDs show the actual density when the tape is reading Density Select button and writing The LEDs light steadily and the Selection LED is off Continued on n
21. 012 90 SHR X0147C 90 CPG 2 Seat the controller on the plastic locking tabs Connect the power cable Connect the internal SCSI cable from the controller module Figure 4 5 NOTE The SCSI ID is set by a switch on the rear plate of the loader FRU Removal and Replacement Procedures 4 7 FRU Removal and Replacement Procedures 4 4 Removing and Replacing the Controller Module Verification Procedure Power up the TZ877 subsystem Execute POST to verify successful removal and replacement Figure 4 4 Captive Screws Securing the Controller Module Tray BULKHEAD CONNECTOR CONTROLLER SCREWS MODULE TRAY SCREWS BULKHEAD CONNECTOR FAN SCREWS SHR X0145A 92 CPG 4 8 FRU Removal and Replacement Procedures FRU Removal and Replacement Procedures 4 5 Removing and Replacing the Loader Transfer Assembly Figure 4 5 Rear Chassis with Components and Cables MODULE TRAY Sa SS INTERNAL Z CABLE BULKHEAD CONNECTOR SHIPPING RESTRAINT SCREW TRAY SCREWS en hte SWITCH SHR X0141C 92 CPG 4 5 Removing and Replacing the Loader Transfer Assembly Removal Procedure 1 Open the rear door of the enclosure 2 Power down the TZ877 subsystem 3 After opening the receiver grasp under the top of the front bezel and slide the subsystem to the first mechanical stop Close the receiver Open the loader transfer assembly Flip the hinge locking lever to the release position Lift the transfer assembly
22. 1Z877 Magazine and Cartridge Tape Subsystem Service Manual Order Number EK TZ877 SM A01 First Edition January 1994 No responsibility is assumed for the use or reliability of software on equipment that is not supplied by Digital Equipment Corporation or its affiliated companies Copyright Digital Equipment Corporation 1994 All rights reserved Printed in U S A The following are trademarks of Digital Equipment Corporation CompacTape DSSI SCSI TK TMSCP VAX and the DIGITAL logo All other trademarks and registered trademarks are the property of their respective owners Warning This is a Class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures Achtung Dieses ist ein Ger t der Funkst rgrenzwertklasse A In Wohnbereichen k nnen bei Betrieb dieses Ger tes Rundfunkst rungen auftreten in welchen Fallen der Benutzer fiir entsprechende Gegenma nahmen verantwortlich ist Attention Ceci est un produit de Classe A Dans un environment domestique ce produit risque de cr er des interf rences radio lectriques il appartiendra alors Putilisateur de prendre les mesures sp cifiques appropri es Contents PROTAGC hfe ah bal orca el ew bate ice DEN ee ea Lean eee eS ix 1 Overview 1 1 OVENRVICW 85 0084 lies Re eas eke Ra ey Guten EE ee ee Bs 1 1 1 2 Operating Modes 0 cece eee eens 1 1 1 3 Hardware Compone
23. BLY CUTOUT 2 PIN INTERLOCK SWITCH CABLE 4 PIN HANDLE MOTOR ASSEMBLY CABLE INTERMEDIATE BEZEL CABLE CLAMP 3 PIN OPEN HANDLE SENSOR CABLE SHR X0147D 90 CPG 9 Engage the mounting screws of the chassis to the drive Tighten the screws in the following order left front left rear right front and the right rear last NOTE If you have difficulty seating the handle motor coupling shaft repeat the above steps 10 Slide the TZ877 subsystem into the enclosure NOTE Carefully guide the cables while sliding the tray in or out Because the cables are loose they could interfere with the handle down optic sensor 4 16 FRU Removal and Replacement Procedures FRU Removal and Replacement Procedures 4 6 Removing and Replacing the TZ87 Tape Drive Figure 4 11 Handle Motor Assembly and Coupling Shaft DRIVE HANDLE SHAFT ee HANDLE MOTOR COUPLING SHAFT SENSOR ASSEMBLY ARM a i PLASTIC PIVOT TAB GEAR PINION GEAR STOPPER SHR 0067 89 SHR X0146A 90 CPG 11 Tighten the two captive screws that secure the controller module tray Figure 4 4 12 Redress the external DSSI or SCSI communications cables into the cable restraints on the rear chassis 13 Redress the power cable into the cable restraints 14 Verify a secure power connection at both ends of the power cable Verification Procedure 1 Power up the TZ877 subsystem 2 Press the Eject button
24. COND MECHANICAL CXO 2461B SHR_X1106C_89 A 6 Head Cleaning Procedure Head Cleaning Procedure A 1 Accessing the Drive Figure A 5 Loader Open Latch LOADER OPEN LATCH SHR 0007 90 SHR X0140 90 CPG A 1 1 Loading the CleaningTape Ill Cartridge into the Drive Be sure to use a CleaningTape III cartridge NOTE If a loader fault exists clear the fault before proceeding To load the CleaningTape III cartridge 1 Pull the handle to the open position when the green Operate Handle indicator lights steadily Figure A 6 2 Load the cartridge into the drive 3 Push the handle closed The green Operate Handle indicator turns off and the yellow Tape in Use indicator begins to blink indicating the tape is loading When the cleaning process is finished the green Operate Handle indicator lights and the beeper sounds Now you can unload the CleaningTape III cartridge Head Cleaning Procedure A 7 Head Cleaning Procedure A 1 Accessing the Drive NOTE If the Use Cleaning Tape indicator remains lit the cleaning cycle was not successful due to an expired cartridge Replace the cleaning cartridge and repeat the cleaning process A 1 2 Securing the TZ877 Magazine Tape Subsystem After cleaning the head by inserting the cartridge directly into the drive secure the TZ877 subsystem as follows 1 Close the loader transfer assembly 2 Press t
25. FE FD FB F7 EF DF BF 7F 6 MW OE OE OE OE OE OE OE 0E 7 MFM DE AD DE AD DE AD DE AD 8 1F AA AA AA AA AA AA AA AA 9 Random data 5 3 3 FTSTO03 Positioning Test This test checks the repeatability of the drive s repositioning ability It writes 10 blocks of records to tape of random record and byte counts You determine the starting data when you invoke the test The tape then is repositioned throughout the area that has been written using the SKIP TAPE MARK SKIP RECORD and SPACE OBJECT commands both in the forward and reverse directions After each reposition a record is read and a software data compare is performed This test also writes a special diagnostic field at the beginning of tape so that other diagnostic tests can recognize it By reading the diagnostic field other tests can recreate the data that is written to the tape and perform read operations with data compare NOTE Depending on the RAM parameters DIAGTRACE and DIAGMASKRECSZ limitations are placed on the maximum number of records and byte counts for each block of records If DIAGTRACE is 1 the maximum number of records a block of records can have is 3966 If it is 0 the maximum number of records a block of records can have is 1023 If DIAGMASKRECSZ is 1 the maximum byte count of a record is 32767 If it is 0 the maximum byte count of a record is 65535 5 4 TZ87 Diagnostic Utilities and Tests TZ87 Diagnostic Utilities and Tests 5 3 Test Descriptio
26. LY BUS CONNECTOR INTERLOCK SWITCH OCP CONTROLLER CABLE MODULE OPERATOR FAN CONTROL LOCATED ON PANEL OUTSIDE REAR OCP HANDLE OF UNIT POWER SUPPLY ARA STALY MECHANICAL ASSEMBLY ASS EJECTION EESE HOME POSITION OF ELEVATOR MLO 012144 FRU Removal and Replacement Procedures 4 3 FRU Removal and Replacement Procedures 4 1 Recommended Spares and Service Aids Table 4 3 Service Aids Part Number Description 30 32447 01 Magazine 29 28982 01 Loader transfer assembly key universal key that fits loader transfer assembly key lock TK85 HC CleaningTape III cartridge 70 27592 02 Field test cartridge 29 26246 00 Static discharge protective field service kit 4 2 Removal and Replacement Guidelines Always follow these guidelines when you perform any FRU removal and replacement procedure in this chapter 1 2 Observe all electrostatic discharge ESD precautions Always use the static discharge protective field service kit antistatic mat and wristbands Set the Mode Select key to Service mode Be sure that a tape is not in the drive If a tape is present dismount the tape by using a console command Then press the Eject button to open the receiver and remove the magazine If the receiver does not open see Section 4 3 Manually Opening the Receiver To power down the TZ877 subsystem set the power switch to 0 off and disconnect the power cord Do not disconnect
27. Press the Eject button to remove the magazine from the receiver 10 Close the receiver FRU Removal and Replacement Procedures 4 11 FRU Removal and Replacement Procedures 4 6 Removing and Replacing the TZ87 Tape Drive Figure 4 7 Loader Transfer Assembly Latch Position BUS LOADER TRANSFER ASSEMBLY CONNEGTOR INTERLOCK oor CONTROLLER CABLE MODULE c 8 Ir OPERATOR FAN NTROL PANEL LOCATED ON OCP OUTSIDE REAR HANDLE OF UNIT POWER SsupPLY MOTOR MECHANICAL ASSEMBLY ASSEMBLY EJECTION LEVER HOME POSITION OF ELEVATOR SHR X0147H 92 CPG ZKO 1285 01 DG 4 6 Removing and Replacing the TZ87 Tape Drive Removal Procedure 1 Power down the TZ877 subsystem 2 After opening the receiver grasp the top of the front bezel and slide the subsystem to the first mechanical stop 3 Close the receiver 4 12 FRU Removal and Replacement Procedures FRU Removal and Replacement Procedures 4 6 Removing and Replacing the TZ87 Tape Drive Figure 4 8 Front of the Magazine Showing Cartridge Slot Numbers 10 11 12 SHR_X1023A_89 Open the rear door of the enclosure Release the two captive screws that secure the controller module tray Figure 4 4 Release and slowly pull the tray about three fourths from the rear chassis Proceed carefully as the tray can be removed fully from the rear chassis The TZ does not have the tray
28. R CONTROL PANEL g Eject BUTTON AND INDICATOR AREA amp Load Unload g Slot Select Power On OCP LABEL Write Protected Tape In Use Use Cleaning Tape Magazine Fault Loader Fault Density Select Bus ID Density Override TK50 70 TK85 TK86 TZ87 Compress ZKO 1217 07 DG Head Cleaning Procedure A 1 Accessing the Drive A 1 Accessing the Drive To access the drive 1 2 3 4 5 Be sure all TZ877 subsystem operations are stopped Ensure that the Eject indicator is lit Figure A 3 Set the Mode Select key to Service mode Press the Eject button and remove the magazine if present Pull the TZ877 subsystem out of the storage array and toward you by placing your hand under the top of the TZ877 subsystem s front bezel Figure A 4 WARNING If you pull the subsystem forward and the Power On indicator does not turn off do not attempt the head cleaning procedure Lift the loader open latch Figure A 5 to the right of the unit Move the loader transfer assembly to the left taking care not to hit the storage array You now have access to the TK85 drive s cartridge entrance Figure A 2 Head Cleaning Procedure A 5 Head Cleaning Procedure A 1 Accessing the Drive Figure A 4 Sliding the TZ877 Subsystem Toward You SE
29. ST irete teh eect eat e Da EE E the a EE 6 Ayes Burn in Loopback Mode 0 00 cc eee eee SCSI Bus Termination 0 0 0 0 cece eee eens POST Terminal Server 0 0 00 c eee eee e eae Lastfail Information 0 0 0 0 0000 cee eae Break Key Operation 0 0 c eect eens Test Descriptions 0 0 ccc eee eens Diagnostic Server 0 0 0 ccc ete eens Diagnostic Terminal Server 0 0 e eee eee Data Patterns seee dec ale wp Alena ea bid hea need Lees FTST03 Positioning Test 0 0 0 ce cece eee FTST05 Streaming Write Test 0 00000 FTST06 Streaming Read Test 00000 eee FTST13 Write Read Test 0 0 0 eee SIEREAM Test 2 32 ech eo Re he Bae Bet doe ao vee ey Pe SCSI Level Tests 2 0 0 0 eee ee eae TEST01 SCSI Level 1 Test 0 0000 TEST02 SCSI Level 2 Test 0 20 0 0 000 e eee LTST09 Loader Streaming Write Read Test LTST11 Loader Read All Test 00000 Retry Algorithm ec oeie E be eee ae ee ee ee E A Head Cleaning Procedure A 1 A 1 1 A 1 2 A 2 Accessing the Drive 0 0 eaea Loading the CleaningTape III Cartridge into the Drive Securing the TZ877 Magazine Tape Subsystem Inserting the CleaningTape III Cartridge into the Magazine AaAaa a a ngan a DADADADAMDANDOAaMO0 B TZ87 Removal and Replacement Procedure B 1 P
30. ad A 7 CleaningTape III cartridge A 1 inserting into magazine A 9 loading into drive A 7 Common failure influences 3 4 Common failure modes symptoms 3 4 Communications interface 1 7 1 11 CompacTape cartridge checking the tape leader 3 2 inserting to magazine 2 12 removing from magazine 2 14 write protect switch 2 12 Index CompacTape III cartridge 1 7 erasure 1 8 Controller fault description 3 7 Controller functions 2 21 Controller initialization 2 21 Controller module 1 7 1 11 Controller module removal B 2 D Data patterns 5 3 Degaussing CompacTape III cartridge 1 8 Density selecting TZ877 1 10 Diagnostics overview 5 1 Diagnostic server 5 3 Diagnostic terminal server 5 3 Disabling OCP 2 4 Door open sensor 4 25 Drive errors error conditions 3 4 Drive fault description 3 7 Drive removal B 2 Drive rewind failure 2 8 DSSI bus 1 7 1 11 Index 1 E Eject button 2 6 cartridge in drive 2 10 no cartridge in drive 2 10 unload function 2 1 Enclosure removal B 1 Erasure CompacTape III cartridge 1 8 Error indicators loader faults 3 6 magazine faults 3 6 F Fan removal and replacement 4 20 Fan removal B 1 Fault description loader 3 7 magazine 3 6 Fault matrix FRU failures 3 3 FRU removal and replacement 4 1 FRU failures nondetectable 3 3 FTST08 test 5 4 FTST05 test 5 5 FTSTO06 test 5 5 FTST18
31. and Loader Fault indicators Failed stay lit NOTE If the Magazine Fault or Loader Fault indicator remains lit POST detected an error See Chapter 3 for error conditions 5 The elevator scans the magazine to determine which slots contain cartridges Continued on next page 2 20 Operating Procedures Operating Procedures 2 5 Initialization and Power On Self Testing Table 2 3 Continued Loader Power on Self test Phase What Happens 6 If the subsystem magazine has a cartridge in slot 0 and no cartridge is in the drive these indicators should be lit e Power On e Eject e Load Unload e Slot Select e Slot 0 2 5 2 Initialization of the Loader Transfer Assembly When the controller module completes its self test successfully it initializes the loader transfer assembly and all OCP indicators light This occurs about 10 seconds after power up If no errors occur the controller module turns off the OCP indicators except for Power On and initiates a magazine scan The magazine scan causes the elevator to move to each cartridge slot moving each cartridge slightly in its position The associated slot indicator then lights This process completes in about 60 seconds depending on the number of cartridges in the magazine 2 5 3 Completion of Controller Initialization Upon successful execution of loader transfer assembly initialization by the controller module and assuming the TZ877 subsystem has a magazi
32. aning Procedure You can use two procedures to clean the read write head 1 Access the tape drive and load the CleaningTape III cartridge directly into the drive Section A 1 2 Insert the CleaningTape III cartridge into the magazine where it then loads into the drive Section A 2 Step 2 is recommended for cleaning the TF857 TF867 and the TZ857 TZ867 Accessing the tape drive directly as in step 1 above may result in a magazine fault NOTES Perform the head cleaning procedure only when the orange Use Cleaning Tape indicator Figures A 2 and A 3 is lit If the Loader Fault indicator is lit clear the fault before proceeding with head cleaning A 2 Head Cleaning Procedure Head Cleaning Procedure Figure A 2 TZ87 Front Panel CARTRIDGE INSERT RELEASE HANDLE DOWN ZKO 1217 27 DG Head Cleaning Procedure A 3 Head Cleaning Procedure Figure A 3 1TZ877 Operator Control Panel MODE SELECT KEY OCP DISABLED a AUTOMATIC MODE oe MANUAL MODE SERVICE MODE A 4 Head Cleaning Procedure CURRENT SLOT INDICATORS 0 6 OPERATO
33. ape drive door or tape drive alignment See Chapter 3 to ensure that the handle motor assembly is correctly assembled and in the correct position Loader transfer assembly Faults caused by the loader transfer assembly are usually not field repairable Replacement of the loader transfer assembly is required Troubleshooting Procedures 3 11 4 FRU Removal and Replacement Procedures This chapter describes how to remove and replace field replaceable units FRUs in the TZ877 subsystem The chapter also provides lists of recommended spares and service aids TZ877 subsystem FRUs cannot be removed unless the system is powered down For a list of the FRUs and references to their removal and replacement procedures see Table 4 1 For guidelines to removing and replacing the FRUs see Section 4 2 Table 4 1 Field Replaceable Units and Related Procedures FRU Procedure Section Controller module 4 4 Loader transfer assembly 4 5 Tape drive 4 6 Tape drive takeup leader 4 7 Operator control panel 4 8 Fan 4 9 Power supply assembly 4 10 Handle motor assembly 4 11 Key lock switch 4 12 4 1 Recommended Spares and Service Aids Table 4 2 the recommended spare parts It includes a description of each spare with a reference to a figure showing the spare FRU Removal and Replacement Procedures 4 1 FRU Removal and Replacement Procedures 4 1 Recommended Spares and Service Aids Table 4 2 Recommended Spares List P
34. art Number Description Figure TZ87 TBS TZ87 cartridge tape drive 10 0 gigabytes 4 1 Controller module SCSI 4 1 70 28824 01 Takeup leader kit 4 13 17 02613 01 Drive communications cable 4 3 29 28102 01 Loader transfer assembly 4 1 29 28103 01 Power supply 110 V ac 50 60 Hz 4 1 29 28103 02 Power supply 220 V ac 50 60 Hz 4 1 29 28104 01 Operator control panel 4 1 29 28106 01 Handle motor assembly 4 1 29 28972 01 Loader transfer assembly communications cable 4 6 10 pin cable connecting to drive controller 29 28974 01 Loader power harness provides dc power for the drive controller and fan 17 01249 02 Internal SCSI cable 50 pin controller module 4 5 cable connecting to the loader bulkhead 29 28976 01 Loader transfer assembly power cable 10 pin 4 6 cable connecting to power supply 29 28977 01 Loader transfer assembly OCP cable 16 pin cable connecting to loader transfer assembly connecting to power supply 29 28979 01 Transfer assembly key switch cable 3 pin cable 4 6 connecting to loader transfer assembly 29 28980 01 Handle open sensor cable 3 pin cable 4 10 connecting to power supply 29 28981 01 Key lock assembly 4 6 12 23374 13 Fan 4 1 Table 4 3 lists service aids for use by Digital s engineers only 4 2 FRU Removal and Replacement Procedures FRU Removal and Replacement Procedures 4 1 Recommended Spares and Service Aids Figure 4 1 1TZ877 Magazine Tape Subsystem FRUs LOADER TRANSFER ASSEMB
35. azine e Rear Chassis TZ87 tape drive Power supply assembly Handle motor assembly Fan Controller module 1 3 1 Loader Transfer Assembly The loader transfer assembly contains an elevator that moves to each storage slot in the magazine and to the cartridge opening in the tape drive This mechanism inserts and extracts the tape cartridges into and from the magazine and drive Signals that drive the elevator mechanics originate at the loader transfer assembly electronics module 1 3 1 1 Operator Control Panel The operator control panel OCP has three pushbuttons Eject Load Unload and Slot Select as well as indicators that are used with the Mode Select key to provide tape drive status Chapter 2 describes how you use the OCP 1 4 Overview Overview 1 3 Hardware Components Figure 1 2 TZ877 Magazine Tape Subsystem Hardware Components LOADER TRANSFER ASSEMBLY 6 S SS BUS z CONNECTOR INTERLOCK SWITCH CONTROLLER MODULE OPERATOR ER CONTROL LOCATED ON peas OUTSIDE REAR OCP HANDLE OF UNIT POWER suppLy MOTOR MECHANICAL ASSEMBLY ASSEMBLY EJECTION LEVER HOME POSITION OF ELEVATOR MLO 012144 1 3 1 2 Magazine The TZ877 subsystem s magazine Figure 1 3 serves as a removable cartridge container The magazine stores up to seven CompacTape III cartridges Overview 1 5 Overview 1 3 Hardware Components Figure 1 3 Front View of the Magazine Tape
36. d Unload or Eject button on the operator control panel you can remove the cartridge manually by first pressing the Unload button on the drive If this step fails manually rewind the tape to unload the cartridge To manually rewind the tape assuming you have already removed the drive from its enclosure 1 Turn the drive on its side note the hole in the circuit board toward the front of the drive 2 Turn the screw inside the hole counterclockwise using a Phillips screwdriver Rewind the tape until it unloads into the cartridge Pull the solenoid out and lift the handle to eject the cartridge 2 8 Operating Procedures Operating Procedures 2 2 Slot Select Load Unload Eject and Density Select Button Functions Return the cartridge to its original storage position in the magazine You can determine the original position by looking at the front of the magazine Figure 2 2 The first empty slot that has a metal flag showing is the slot from which the cartridge should have originated Insert the cartridge from the rear of the magazine Be sure the write protect switch is adjacent to the slot number on the front of the magazine to ensure that its position is the same as those of the other cartridges NOTE Be sure to check the cartridge for any damage that may have occurred Figure 2 2 Front View of the TZ877 Magazine SHR_X1023A_89 2 2 4 Opening the Receive
37. dge to the next is not automatic operator intervention is required to select the next or any other cartridge Service mode Unlocks the subsystem from the enclosure and removes it from its normal operating position Use this mode when you perform head cleaning jam recovery and servicing procedures You can select these modes through the Mode Select key Figure 1 1 1 2 Overview Overview 1 2 Operating Modes Figure 1 1 Front View of the TZ877 Operator Control Panel OPERATOR CONTROL PANEL g Eject BUTTON AND INDICATOR AREA g Load Unload MODE SELECT KEY Slot Select OCP DISABLED a AUTOMATIC n MODE Power On OCP LABEL CURRENT Write SLOT Protected INDICATORS A 0 6 Tape In Use MANUAL 1 MODE Use SERICE Cleaning Tape Magazine Fault Loader Fault Density Select Bus ID Density Override TK50 70 TK85 TK86 TZ87 Compress ZKO 1217 07 DG Overview 1 3 Overview 1 3 Hardware Components 1 3 Hardware Components The TZ877 tape subsystem consists of the following major hardware components Figure 1 2 Loader Transfer Assembly Operator control panel Mag
38. egister initialization The expected and actual values as well as the physical hardware address of the register are displayed 5 2 Break Key Operation During POST testing the Break key causes the POST kernel to list information about the last error detected including the last fail information if any Currently there is one limitation using the Break key during the local RAM testing may cause a miscompare error It is recommended that the Break key not be used while POST is running 5 2 TZ87 Diagnostic Utilities and Tests TZ87 Diagnostic Utilities and Tests 5 3 Test Descriptions 5 3 Test Descriptions The tests described in the following sections test the functionality of the TZ87 subsystem These tests return statistical information to the originating process Unique error codes are returned to help determine the FRU that caused the error If the program can determine the FRU error it is included Otherwise you must either run more tests or determine the error from the data returned in the statistical information 5 3 1 Diagnostic Server The control portion of the microdiagnostics is known as the diagnostic server The server interfaces with the diagnostic terminal server and the SCSI port The diagnostic server creates SCSI packets and interprets responses from the SCSI server The diagnostic server also acts as the interface for the tests with the remainder of the TZ87 firmware Gathering and computing statistics
39. ext page Operating Procedures 2 7 Operating Procedures 2 2 Slot Select Load Unload Eject and Density Select Button Functions Table 2 2 Continued Results of Density Selection lf Then You used the Density Select button and if the actual tape density is the same as the density you selected You used the Density Select button and if the actual tape density differs from the density selected The LED next to one of the yellow indicators showing actual density selection and Density Select lights steadily For example if the actual tape density is 10 0 and the selected tape density is 10 0 then the LED next to 10 0 lights The LED next to the actual density lights steadily The LED next to the selected density blinks and the Density Select LED flashes For example if the actual tape density is 10 0 and the selected density is 6 0 the 10 0 LED lights steadily the 6 0 LED blinks and the Density Select LED blinks On a write from BOT the tape is reformatted to the selected density and the following occurs the 10 0 indicator shuts off the 6 0 indicator lights steadily and the Density Select indicator lights steadily NOTE To select density over the SCSI bus implement a Mode Select SCSI 2 command with the desired density and write data to the tape from BOT 2 2 3 1 Manually Unloading a Cartridge from the Drive If a cartridge does not unload from the tape drive when you press the Loa
40. from the two hinge pins FRU Removal and Replacement Procedures 4 9 FRU Removal and Replacement Procedures 4 5 Removing and Replacing the Loader Transfer Assembly Figure 4 6 Left Side View of the TZ877 Subsystem A LEFT CAPTIVE GROUND SCREWS STRAP LOADER HINGE LOCKING LEVER TRANSFER ASSEMBLY COMMUNICATIONS CABLE LOADER TRANSFER ASSEMBLY POWER CABLE KEY LOCK ASSEMBLY Y CABLE CLAMPS TRANSFER ASSEMBLY KEY SWITCH CABLE SHR X0143 90 CPG Place the loader transfer assembly on an antistatic mat Note the number on the node ID label on the OCP Remove the OCP from the loader transfer assembly Figure 4 7 Place the OCP on an antistatic mat Package the loader transfer assembly in the box that contained the new loader transfer assembly Return it to the repair depot Replacement Procedure 1 2 3 Remove the empty OCP bezel from the new loader transfer assembly Install the original OCP into the new loader transfer assembly Place the new loader transfer assembly on the rear chassis hinge pins The loader transfer assembly must be open Press the bottom part of the hinge locking lever to clamp the top hinge pin 4 10 FRU Removal and Replacement Procedures FRU Removal and Replacement Procedures 4 5 Removing and Replacing the Loader Transfer Assembly Reconnect the ground strap Reconnect the loader transfer assembly com
41. he TZ877 loader open latch to secure the TZ877 subsystem Figure A 5 Push the subsystem back into the storage array 4 Be sure the Power On indicator is lit Set the Mode Select key to a position other than Service mode A 8 Head Cleaning Procedure Head Cleaning Procedure A 1 Accessing the Drive Figure A 6 Loading the Cartridge SHR 0256 87 SHR_X1093_89_CPG A 2 Inserting the CleaningTape Ill Cartridge into the Magazine CAUTION If you choose to use this cleaning procedure you must return the CompacTape III cartridges to their original slots and remove the cleaning cartridge from the magazine after the cleaning procedure is done Head Cleaning Procedure A 9 Head Cleaning Procedure A 2 Inserting the CleaningTape III Cartridge into the Magazine To clean the read write head by inserting the CleaningTape III into the magazine rather than the drive use the following steps Figure A 3 1 OU Gee 102 uo Press the Load Unload button to remove any cartridges in the drive and return them to the magazine Press the Eject button to open the receiver and remove the magazine Insert the CleaningTape III cartridge into the first slot of the magazine Insert the magazine into the receiver close the receiver Press the Load Unload button to load the cleaning cartridge into the drive Once the cleaning cartridge is loaded the drive begins the head cleaning procedure When the cleaning procedure is complete
42. he maximum transfer rate is 2 5 Mbytes s write and 3 Mbytes s read The TZ877 can store More than 10 0 GB data native cartridge capacity 70 0 GB total e More than 20 0 GB data at 2 1 compression ratio 140 0 GB total The TZ877 can load and unload tape cartridges into and from a tape drive providing a degree of unattended backup as well as perform single cartridge operations The TZ877 subsystems perform automatic sequential tape operations These subsystems also execute operating system commands qualifiers and parameters to store data from user disk areas to the tape drive 1 2 Operating Modes TZ877 subsystems operate in the following modes e OCP Disabled mode Locks the subsystem into the enclosure and locks the receiver The pushbuttons on the operator control panel OCP are disabled This mode automatically loads the next tape cartridge into the drive after you issue the DISMOUNT command e Automatic mode The subsystem s default or normal mode It locks the subsystem into the enclosure but leaves the receiver unlocked This mode automatically loads the next tape cartridge into the drive after you issue the DISMOUNT command The OCP pushbuttons are enabled Overview 1 1 Overview 1 2 Operating Modes Manual mode Locks the subsystem into the enclosure but leaves the receiver unlocked This mode allows for single cartridge operations only The OCP pushbuttons are enabled Loading and unloading of one cartri
43. he power supply assembly through the small opening in the bottom of the rear chassis Then pull the assembly forward Remove the assembly Replacement Procedure Reverse the preceding steps Verification Procedure 1 Power up the TZ877 subsystem If the Power On indicator fails to light slide the subsystem farther into the enclosure to activate the interlock switch Press the Load Unload button to return the cartridge to the magazine if a cartridge is in the drive FRU Removal and Replacement Procedures 4 23 FRU Removal and Replacement Procedures 4 11 Removing and Replacing the Handle Motor Assembly Figure 4 15 Removing the Power Supply Assembly from the Rear Chassis gt POWER SUPPLY ASSEMBLY SHR 0013 90 SHR X0142 90 CPG 4 11 Removing and Replacing the Handle Motor Assembly Removal Procedure 1 Open the rear door of the enclosure and power down the TZ877 subsystem NOTE If the OCP Tape in Use indicator is lit a cartridge is in the drive Set the Mode Select key to the Manual position Press the Load Unload button to return the cartridge to the magazine If this fails manually unload the cartridge after opening the loader transfer assembly 2 From the rear of the enclosure push the TZ877 subsystem to the first mechanical stop 3 From the side lift the latch to open the loader transfer assembly 4 24 FRU Removal and Replacement Procedures 10 11 FRU Removal and Replaceme
44. igure 1 4 is a gray plastic cartridge containing 1200 feet of 1 2 inch magnetic metal particle MP tape The cartridge has a write protect switch to prevent accidental erasure of data When the switch is moved to the left and the small orange rectangle is visible data cannot be written to the tape A package of slide in labels and a cartridge handling information sheet are provided with each CompacTape III cartridge The TZ87 drive reads and writes data in a two track parallel serpentine fashion To read write 128 tracks 64 pairs on the tape the TZ87 tape drive e Travels the entire length of tape on two tracks at approximately 100 inches per second e Steps the head and reverses tape direction then continues to read write on the next two tracks To ensure the reliability of cartridges that contain recorded data and that may be archived for a long time store the cartridges in a clean controlled environment with the following conditions e Environmental temperature 18 3 C to 26 1 C 65 F to 79 F e Relative humidity 20 to 60 Overview 1 7 Overview 1 4 CompacTape III Cartridge The above environmental conditions are also recommended for shelf storage of cartridges that do not contain recorded data NOTE Degaussing tools for erasing tapes do not work with the CompacTape III cartridge 1 8 Overview Overview 1 4 CompactTape Ill Cartridge Figure 1 4 CompactTape Ill Cartridge ORANGE INDICATOR
45. in 22 20 cm 8 74 in 64 77 cm 25 5 in 24 95 kg 55 1b 62 dB 10 C to 40 C 50 F to 104 F 40 C to 66 C 40 F to 150 F 20 to 80 noncondensing 10 to 95 Meets applicable FCC VDE and FTZ standards for Class B devices Meets UL CSA TUV BG MARK and IEC standards 7 100 to 120 220 to 240 V ac 2 1 amp Continued on next page Overview 1 11 Overview 1 6 Specifications Table 1 2 Continued 1TZ877 Magazine Tape Subsystem Specifications Characteristic Specifications AC power consumption 110 W typical 113 W maximum Communications interface SCSI 2 bus single ended or differential Cycle time 50 s maximum 1 12 Overview Overview 1 6 Specifications Table 1 3 TZ87 Tape Drive Specifications Characteristic Specification s Mode of operation Media Track density Bit density Number of tracks Transfer rate raw native Transfer rate user native uncompressed Transfer rate user compressed Tape speed Track format Cartridge capacity Streaming 12 77 mm 1 2 in unformatted magnetic tape 256 tracks in 62 500 bits in 128 1 71 MBytes s 1 25 MBytes s More than 2 50 MBytes s maximum write More than 3 00 MBytes s maximum read 110 in s Two track parallel serpentine recording 10 0 GB formatted native 20 0 GB formatted compressed Assumes 2 1 1Compression ratio is data dependent Overview 1 13 2 Operating Procedures This chapter desc
46. is to ensure no damage occurs from snagging Engage the drive shaft with the handle motor coupling shaft Push the handle motor coupling shaft toward the drive it partially slips onto the handle shaft Place the rotated plastic tab into a horizontal position Position the pivot gear of the handle coupling shaft so that the top flat edge is perpendicular to the floor of the unit Locate the plastic tab on the drive This tab and the small metal tab write protect switch are inside the cartridge opening next to the Tape In Use indicator on the bezel This assembly locks the drive handle You must push it to the right to lift the handle NOTE Failure to release the plastic tab before lifting the handle could cause damage Do not force the handle against the locking mechanism 4 14 FRU Removal and Replacement Procedures FRU Removal and Replacement Procedures 4 6 Removing and Replacing the TZ87 Tape Drive Figure 4 9 Second Mechanical Stop SECOND MECHANICAL CXO 2461B SHR_X1106C_89 8 With the handle in the open position apply pressure to the handle coupling shaft and slowly rotate the drive handle downward You may have to move the drive slightly to seat the shaft firmly FRU Removal and Replacement Procedures 4 15 FRU Removal and Replacement Procedures 4 6 Removing and Replacing the TZ87 Tape Drive Figure 4 10 1TZ877 Subsystem Cables and Components HANDLE MOTOR ASSEM
47. isolate cartridge motion faults 1 Set the Mode Select key to Automatic mode returning the subsystem to its normal mode 2 Attempt to reproduce the error Open the loader transfer assembly Figure 3 2 to locate or remove the cartridge in question Figure 3 2 Loader Open Latch LOADER OPEN LATCH SHR 0007 90 SHR X0140 90 CPG 4 Open the receiver by squeezing the mechanical ejection lever Figure 3 3 to remove the magazine Troubleshooting Procedures 3 9 Troubleshooting Procedures 3 7 Cartridge Motion Faults Figure 3 3 Mechanical Ejection Lever BUS LOADER TRANSFER ASSEMBLY CONNEGTOR INTERLOCK CONTROLLER MODULE PAT AAA anan OPERATOR FAN an LOCATED ON OCP HANDLE OUTSIDE REAR OF UNIT POWER SupPLY MOTOR MECHANICAL ASSEMBLY ASSEMBLY EJECTION LEVER HOME POSITION OF ELEVATOR SHR X0147H 92 CPG ZKO 1285 01 DG 5 Insert the cartridge into the magazine from the rear replacing the cartridge in its original slot the metal tab next to the slot number indicates the original slot NOTE The subsystem may indicate a magazine fault due to reinserting the cartridge into the magazine as described in the preceding process To 3 10 Troubleshooting Procedures Troubleshooting Procedures 3 7 Cartridge Motion Faults clear this magazine fault remove the magazine from the receiver and close the receiver When the Eject i
48. itialization and Power On Self Testing Figure 2 7 Mechanical Stops Associated with Service Mode Newer Models T d t LS c hy e TZ87 tape drive e Controller module The following subsections show the sequence in which initialization occurs 2 18 Operating Procedures Operating Procedures 2 5 Initialization and Power On Self Testing Figure 2 8 Mechanical Stops Associated with Service Mode Older Models SECOND MECHANICAL FIRST STOP MECHANICAL SHR X0147C 90 CPG ZKO 1285 05 DG 2 5 1 Power On Self Test Table 2 3 explains what happens during each phase of the TZ877 operation Operating Procedures 2 19 Operating Procedures 2 5 Initialization and Power On Self Testing Table 2 3 Loader Power on Self test Phase What Happens 1 When you turn on the TZ877 subsystem the OCP Loader Fault and Power On indicators light 2 One second later all OCP indicators light Within 15 seconds power on self test POST of the loader mechanics completes e Ifthe Magazine Fault and Loader Fault indicators turn off loader POST succeeded e Ifthe Magazine Fault and Loader Fault indicators stay lit loader POST failed 3 A few seconds later the drive controller resets the loader Loader POST starts again lf Then POST The Magazine Fault and Loader Fault indicators Passed turn off and shortly after all OCP indicators except for Power On turn off The Magazine Fault
49. l panel assembly to the loader transfer assembly Disconnect the cable from the OCP Figure 4 6 Remove the operator control panel Replacement Procedure Reverse the preceding steps Verification Procedure FRU Removal and Replacement Procedures 4 19 FRU Removal and Replacement Procedures 4 8 Removing and Replacing the Operator Control Panel Figure 4 12 Dust Cover LEFT FRONT CLIP TAB FRONT CENTER CLIP TAB CENTER REAR CLIP TAB MKV X3102 91 Execute the power on self test POST All OCP indicators except for the Loader Fault indicator are lit until the host system initializes the subsystem 4 9 Removing and Replacing the Fan Removal Procedure 1 Open the rear door of the enclosure 2 Power down the TZ877 subsystem 4 20 FRU Removal and Replacement Procedures FRU Removal and Replacement Procedures 4 9 Removing and Replacing the Fan Figure 4 13 1TZ87 Tape Path Takeup Leader Replaced TAKEUP NOTCH IN BUCKLING LEADER LEADER LINK CARTRIDGE INSERT RELEASE HANDLE DOWN TAKEUP BUCKLING Siseaces LOCATION ACCEPTABLE OF LEADER LEADER UNHOOKED UNACCEPTABLE TAKEUP LEADER LEADER DISPLACED ABOVE LINK MLO 012146 3 At the TZ877 rear chassis remove the two screws Figure 4 4 that secure the fan Remove and set aside the fan s grill
50. munications cables to the electronics module Secure the cable clamps Close the loader transfer assembly Be sure the latch is closed Slide the TZ877 subsystem into the enclosure Complete and install a new node ID label The label should contain the same information as the label on the faulty unit 10 Secure the rear door of the SF200 SX100 or SX300 storage array Verification Procedure 1 9 Power up the TZ877 subsystem Be sure all OCP indicators are lit The power on self test executes successfully in about 15 seconds Except for the Loader Fault indicator all indicators are lit until the host system initializes the TZ877 subsystem Press the Eject button to open the receiver Insert a field test cartridge into slot 0 at the front of a spare magazine Figure 4 8 Be sure the cartridge is write enabled Insert the magazine into the receiver Close the receiver The elevator performs a magazine scan When the receiver is closed after a power up a full extended scan is performed Each cartridge is pulled into the elevator and put back into the slot This takes longer than the normal scan of 15 seconds Press the Load Unload button to verify load operation Be sure the Load Unload and Tape In Use indicators are on after the cartridge loads into the drive Press the Load Unload button again to unload the cartridge Be sure the Load Unload Eject and Slot Select indicators are on after the cartridge unloads
51. n 1 Press the Eject button to open the receiver 2 Grasp the receiver and gently pull it forward to access the magazine 3 Grasp the magazine s handle and lift the magazine out of the receiver Figure 2 3 2 10 Operating Procedures Operating Procedures 2 3 Magazine Figure 2 3 Removing the Magazine from the Open Receiver SHR X0045 90 Operating Procedures 2 11 Operating Procedures 2 3 Magazine 2 3 2 Inserting Cartridges into the Magazine To insert a cartridge use the following steps 1 Grasp the cartridge with the CompacTape III label up and the write protect switch toward you Figure 2 4 2 Set the write protect switch to the correct position Push the cartridge into the slot until it stops and you hear a click Figure 2 5 Figure 2 4 Write Protect Switch on the CompactTape Ill ORANGE INDICATOR WRITE _ PROTECT SWITCH WRITE ENABLED WRITE PROTECTED SHR_X1020C_89 2 12 Operating Procedures Operating Procedures 2 3 Magazine Figure 2 5 Inserting a Cartridge into the Front of the Magazine BACK OF MAGAZINE _ NOTE Push tape in until a click is heard vi FRONT OF SLOT MAGAZINE NUMBERS 0 6 ZKO 1217 05 DG Operating Procedures 2 13 Operating Procedures 2 3 Magazine 2 3 3 Removing a Cartridge from the Magazine To remove a cartridge from the magazine push the cartridge farther into the slot and then release Figure 2 6 NOTE Never
52. n Self Testing Figure 2 9 TZ87 Front Panel CARTRIDGE INSERT RELEASE HANDLE DOWN ZKO 1217 27 DG Operating Procedures 2 23 3 Troubleshooting Procedures This chapter describes failures that are not detectable through diagnostics error conditions magazine and loader faults power problems and cartridge motion faults 3 1 Avoiding Basic Problems Follow these guidelines when operating the TZ877 subsystem to avoid basic problems Use CompacTape III cartridges or for read only operations use CompacTape or CompacTape II cartridges Check the tape leader in the cartridge by lifting the cartridge latch that opens the door to expose the leader Be sure the leader is in the same position as the one shown in Figure 3 1 CAUTION Do not touch exposed portions of the magnetic tape If the tape leader is not in the correct position use a new cartridge Be sure the receiver is fully closed and the current slot indicator is lit for the starting cartridge Be sure no slots in the magazine are empty between the starting cartridge and the expected completion cartridge NOTE The TZ877 subsystem unloads and loads the next cartridge when the subsystem receives a DISMOUNT command from the host system Troublesh
53. ndicator lights insert the magazine back into the subsystem The OCP indicators signal when you can cycle cartridges into and out of the drive Concentrate on the cartridge in question but be sure to test the others as well There should be no difference in the action taken by the mechanics due to an OCP or system command 3 7 2 Recovering Cartridges Cartridge motion problems may be caused by a fault in one of the following components Suggestions for recovering cartridges follow Magazine Cartridge motion problems caused by faulty magazines are usually indicated by problems that occur when the elevator attempts to return the cartridge to the magazine Replace the magazine and see if the problem persists You may not be able to find a magazine problem by inspection alone For example a damaged surface finish in or near a slot causing excessive friction may not be obvious Cartridge Cartridge motion problems that occur with one cartridge only are likely to be caused by that particular cartridge Move the cartridge to another slot and note if the problem occurs there as well Faulty cartridges can also cause problems in the drive area Check the leader positioning in both drive and cartridge and the operation of the cartridge door Tape drive or handle motor assembly Cartridge motion problems caused by a faulty or misaligned tape drive occur when the tape is loaded into or unloaded from the drive Check for problems in the t
54. ne with a cartridge in slot 0 the following indicators light e Power On e Eject e Load Unload e Slot Select e Slot 0 Or the indicator of the first available slot lights Operating Procedures 2 21 Operating Procedures 2 5 Initialization and Power On Self Testing If the Mode Select key is not in OCP Disabled mode the Slot Select Load Unload and Eject buttons are enabled If the controller module detects a loader transfer assembly or tape drive error during its initialization the OCP Loader Fault and current slot indicators display the device in error NOTE If the above initialization sequence does not complete successfully check the results of the controller module and tape drive self tests If the controller module self test completed successfully you can diagnose failures in the drive or subsystem by using the DUP diagnostic programs in Chapter 5 2 5 4 TZ87 Tape Drive Power On Self Test The TZ87 drive runs its self test during power on or during a reset process A successful self test is indicated by the Operate Handle indicator being lit if no cartridge is installed or by the Tape in Use indicator being lit if a cartridge is installed Figure 2 9 If the self test is not successful all indicators on the TZ87 front panel blink You must open the loader transfer assembly to observe the TZ87 front panel indicators 2 22 Operating Procedures Operating Procedures 2 5 Initialization and Power O
55. ns The runtime parameter you can change is the data pattern This test executes in about 40 minutes 5 3 4 FTST05 Streaming Write Test This test verifies the drive s ability to write data in a streaming manner Unless you specify otherwise a random number of blocks of records are written to tape of varying record and byte counts The default amount of data is set to ensure a track turnaround and a head step operation You specify the data pattern as well if no data pattern is specified the data pattern defaults to a rotating pattern This test also writes a diagnostic field on the tape so that other tests can recreate the data that is written to the tape and perform read operations with data compare The runtime parameters you can change are the record count byte count and data pattern 5 3 5 FTSTO06 Streaming Read Test This test checks the accuracy of the drive while reading data in a streaming manner It uses the seeds left from a previous write or positioning test to create the data used for software data compares Software data compare operations are performed on pseudo randomly chosen records of data If a diagnostic field read using this test is written by FTST03 this test performs in the same manner as the FTST03 with the exception of the write procedure The runtime parameters you can change are the byte count and data pattern 5 3 6 FTST13 Write Read Test This test writes data to the tape in a streaming manne
56. nt Procedures 4 11 Removing and Replacing the Handle Motor Assembly Release the two captive screws that secure the controller module tray Figure 4 4 Slide the tray several inches from the TZ877 subsystem s rear chassis Press the first mechanical stop to access the second mechanical stop Remove the intermediate bezel Figure 4 10 Remove the two right hand connector plugs from the power distribution panel The left is a 3 pin connector attached to the handle down sensor assembly the right is a 4 pin connector attached to the handle motor assembly Thread these connectors through the side metal cutout Figure 4 10 Release the cable clamp Figure 4 10 Slide the plastic tab Figure 4 10 on the handle motor coupling shaft to the right rotate the tab upward Loosen the three captive screws Figure 4 11 located at the outer corners of the handle motor assembly Grasp the handle motor assembly and slide it slightly upward and to the right to remove it from the subsystem NOTE You do not have to remove the motor screws or disconnect the shaft coupling mechanism Replacement Procedure Before you replace the handle motor assembly be sure the sensor assembly arm rests on the plastic stopper located on the pivot gear Figure 4 11 You may have to move the gears slightly to seat the sensor assembly arm correctly 1 Align the three corner screws over the mounting holes insert the handle motor as
57. nts 0 0 0 sasaaa ee ee eens 1 4 1 3 1 Loader Transfer Assembly 0000s cece neces 1 4 1 3 1 1 Operator Control Panel 0 0 00 cece eee 1 4 1 3 1 2 Magazine ss ancien See Se adi wattage tia d baa 1 5 1 3 2 Rear Chassis 3 s c 0 eaies de ee ee ale de ey bees as 1 6 1 3 2 1 TZ87 Tape Drives sieaa ate eles A ae EIS 1 6 1 3 2 2 Power Supply Assembly 0000 cee eee 1 6 1 3 2 3 Handle Motor Assembly 0 0 00 cee eens 1 7 1 3 2 4 ELE a Ree ee a A E REA CS EAI SR Sa a RE 1 7 1 3 2 5 Controller Module 0 0 00 cece eee eee 1 7 1 4 CompacTape III Cartridge 0 0 cee 1 7 1 4 1 Cartridge Compatability 0 0 0 cece eens 1 9 1 4 2 Selecting Density with the TZ877 005 1 10 1 5 Service Features 5 5 eases bis Rae a abe eae hws Bale a wie 1 10 1 5 1 Controller Module 0 cece eee eee eens 1 11 1 6 Specifications secu ee caite Gk Awa ee gue a he aus wee Saeed 1 11 2 Operating Procedures 2 1 Operator Control Panel 0 0 ccc ee ees 2 1 2 1 1 Disabling the Operator Control Panel 2 4 2 2 Slot Select Load Unload Eject and Density Select Button Functions one Se i See le ib Meee ei WSs eek 2 6 2 2 1 Selecting a Cartridge 0 0 0 cece eee ee 2 6 2 2 2 Loading the Cartridge 0 0 0 0 cece ee eee 2 6 2 2 3 Selecting Density 0 0 ccc ees 2 6 2 2 3 1 Manually Unloading a Cartridge from the Drive 2 8 2
58. o OCP Disabled This prevents unwanted manual intervention when the TZ877 subsystem is running unattended 2 4 Operating Procedures Operating Procedures 2 1 Operator Control Panel Figure 2 1 1Z877 Operator Control Panel OPERATOR CONTROL PANEL Eject BUTTON Load Unload AND INDICATOR MODE SELECT KEY AREA Slot Select OCP DISABLED a AUTOMATIC MODE Power On OCP LABEL CURRENT Write SLOT Protected INDICATORS N 0 6 Tape In Use MANUAL 1 MODE Use SERVICE Cleaning Tape MODE Magazine Fault Loader Fault Density Select Bus ID Density Override TK50 70 TK85 Lt TK86 TZ87 Compress ZKO 1217 07 DG Operating Procedures 2 5 Operating Procedures 2 2 Slot Select Load Unload Eject and Density Select Button Functions 2 2 Slot Select Load Unload Eject and Density Select Button Functions Slot Select Load Unload Eject and Density Select are OCP pushbuttons They have a green indicator and are operable only when their corresponding indicators are lit NOTE Load Unload has three functions load unload and reset If a loader fault occurred and the Loader Fault indica
59. oller module or other FRU the OCP pushbuttons or the indicators do not function All indicators turn off briefly at power on Inspection required See Chapter 3 for information on removing and replacing faulty FRUs Troubleshooting Procedures 3 3 Troubleshooting Procedures 3 4 Error Conditions 3 4 Error Conditions This section describes error conditions failure influences and soft error rates It also includes information on magazine and loader faults Table 3 2 lists common failures causes and corrections 3 4 1 Detecting Common Failure Influences Many factors may influence failures Defective media Operator or user errors Incorrect backup commands Poor power or grounding NOTE The tape drive may appear to be the failing unit due to the operation being performed at the time of failure such as backup Before you replace the drive ensure that any problems you find are not due to the above factors 3 4 2 Soft Errors Soft errors are normally considered to be events rather than errors In the case of soft errors no data is lost For a write operation the data is rewritten For a read operation retries are performed Some of the variables that create soft errors are Media dropouts Temperature of media not acclimatized System bus activity Applications Head wear Contamination Foreign debris in tape path Changes in soft error rates for any particular drive and cartridge are more
60. ooting Procedures 3 1 Troubleshooting Procedures 3 1 Avoiding Basic Problems Figure 3 1 Opening the Cartridge Door to Check the Tape Leader DOOR LOCK CARTRIDGE RELEASE BY LIFTING LEADER DOOR LOCK WITH THUMB SHR 0002 86 SHR_X1027_89_CPG 3 2 Backup Operation Failure Some manual operations if not performed correctly may cause backup operations to fail Loading CompacTape or CompacTape II cartridges when executing write operations e Loading write protected CompacTape III cartridges when executing write operations e Selecting the incorrect cartridge slot 3 2 Troubleshooting Procedures 3 3 Nondetectable FRU Failure Troubleshooting Procedures 3 3 Nondetectable FRU Failure Table 3 1 describes situations that can occur with field replaceable unit FRU failures not detectable through diagnostics These failures may cause subsystem failure Table 3 1 Nondetectable FRU Failures FRU Possible Failure Tape drive communications cable Handle motor assembly Power supply assembly Operator control panel Fan After you replace either a faulty drive or a loader transfer assembly power is on but the subsystem still fails Same as above Characterized by subsystem retry errors When connected to a known good source of power and the power switch is set to 1 on the subsystem does not power up and the Power On indicator remains off After you replace either a faulty contr
61. ot include captive screws and washers prepare to catch them after they are loosened Slide the key lock switch bracket out of position Replacement Procedure 1 With the subsystem still at the first mechanical stop align the new key lock switch bracket over the mounting holes Place the Mode Select key back in the key lock switch to hold the lock in the Service mode position Fasten the screws and washers Figure 4 16 of the bracket Connect the 3 pin plug Figure 4 16 into the controller module 4 26 FRU Removal and Replacement Procedures FRU Removal and Replacement Procedures 4 12 Removing and Replacing the Mode Select Key Lock Place the connector wires in the cable clamp and close the clamp 6 Replace the top protective cover by aligning and tightening the captive screw to the standoff nut Figure 4 16 7 Slide the subsystem back into the enclosure Figure 4 16 Key Lock Assembly Screw 3 Pin Protective Connector Panel Switch Mounting Screws MKV X3100 91 FRU Removal and Replacement Procedures 4 27 9 TZ87 Diagnostic Utilities and Tests This chapter describes the diagnostic utilities and tests for the TZ877 tape drive 5 1 POST The controller power on self test POST program runs whenever the controller module is reset It is
62. ot indicator to the next slot Power On indicator Green On Indicates the TZ877 is in a known good power state ac and dc voltages are within tolerance Write Protected indicator Orange On The cartridge currently in the drive is write protected by one of these methods Setting the write protect switch to write protect Using software write protect qualifiers Off The current cartridge is write enabled Tape In Use indicator Yellow Slow Tape is rewinding blinking Rapid Tape is reading or writing blinking On steadily A cartridge is in the drive and the tape is not moving Off No cartridge is in the drive Use Cleaning Tape indicator Orange On The read write head needs cleaning See Appendix A Magazine Fault indicator Red On Indicates a magazine failure Loader Fault indicator Red On Indicates a loader transfer 2 2 Operating Procedures assembly error or drive error Continued on next page Table 2 1 Operating Procedures 2 1 Operator Control Panel Continued TZ877 Operator Control Panel Button Indicator Color State Function Current slot indicators 0 6 Density Select Auto TK50 TK70 TK85 TK86 Green Green Yellow Yellow Yellow On On On Blinking Identifies the current slot Each current slot indicator blinks when its corresponding cartridge moves to or from the drive Also used with the Magazine Fault or Loader Fault indicator to show the type of fault
63. oving the metal tab in front of the cartridge This is the main source of magazine faults Use the correct cartridge insertion removal procedure Sections 2 3 2 and 2 3 3 to clear a magazine fault caused by cases 1 2 and 3 e Press the Eject button to open the receiver e Remove the magazine and check for a metal tab over an open slot This is the slot from which the cartridge was removed If a metal tab is found over a open slot then Reinsert the missing cartridge correctly pushing the cartridge in until it snaps into place If no cartridge is needed in this slot push a cartridge into the slot and then remove it according to the normal cartridge insertion removal procedure This step is critical to avoid additional magazine faults 3 6 Troubleshooting Procedures Troubleshooting Procedures 3 5 Magazine and Loader Faults Insert the magazine into the receiver Close the receiver e If no metal tab is covering an empty slot the cartridge loaded into the drive was manually removed and reinserted into the magazine To clear this case just close the receiver Detecting case 4 the cartridge was manually loaded into the drive This can be detected by the Magazine Fault LED and slot LEDs 0 and 6 being lit This is the only time LEDs 0 and 6 will be lit To clear the Magazine Fault caused by case 4 e Press the Eject button to open the receiver e Remove the magazine e Reach in and manually unload the tape from the drive by pre
64. r The Eject button opens the receiver for inserting or removing the magazine It is disabled when the Mode Select key is in the OCP Disabled position You can also use the Eject button to unload a cartridge from the drive Operating Procedures 2 9 Operating Procedures 2 2 Slot Select Load Unload Eject and Density Select Button Functions NOTE When a cartridge is not in the drive the Slot Select Load Unload and Eject indicators are lit before any operation begins Pressing the Eject button causes all indicators to turn off The elevator then returns to its home position and the receiver opens When a cartridge is in the drive the Eject and Load Unload indicators are lit before the operation begins When you press the Eject button both indicators turn off and the cartridge unloads from the drive and returns to the magazine The receiver then opens to allow access to the magazine In both situations once the receiver closes again a magazine scan begins and the indicators light again when the scan is complete 2 3 Magazine This section describes how to remove the TZ877 magazine from the receiver load and unload cartridges into and from the magazine and restore a magazine to the receiver 2 3 1 Removing the Magazine from the Receiver To remove the magazine from the TZ877 subsystem first be sure that e The Power On indicator is lit Figure 2 1 e The Eject indicator is lit before you press the Eject button The
65. r Data buffers are reused rather than being refilled with new data Any data patterns can be used The data buffers are filled once when starting a write from BOT therefore the tape does not stream for the first few records Once all the buffers are accessed the tape streams for the remaining time Read operation is as previously described except that no data compares are done This ensures the tape streams continuously while reading The runtime parameters you can change are the record count byte count and data pattern This test executes in approximately two hours when writing and reading the entire tape TZ87 Diagnostic Utilities and Tests 5 5 TZ87 Diagnostic Utilities and Tests 5 3 Test Descriptions 5 3 7 STREAM Test This test calls the FTST05 and FTST06 tests and executes in about nine hours 5 4 SCSI Level Tests The following sections describe the SCSI level test 5 4 1 TEST01 SCSI Level 1 Test Because a full power up is not necessary be sure the controller hardware and software is functioning properly before invoking this diagnostic test This test is an extension of the power up self tests The EDC is calculated for the whole ROM and compared with the last long word of ROM Two queues that the controller software uses is checked by dequeuing and enqueuing items If there is a loader attached a software reset is done When complete errors are passed to the extended sense bytes of the REQUEST SENSE data This test
66. rator control panel removal and replacement 4 19 P Positioning test 5 4 POST TZ87 5 1 TZ87 tape drive 2 22 POST terminal server 5 2 Power on self test POST 2 17 TK85 tape drive 2 22 Power problems 3 8 Power supply assembly 1 6 removal and replacement 4 23 Power supply removal B 2 Preliminary steps B 1 R Rear chassis 1 6 controller module 1 7 1 11 fan 1 7 handle motor assembly 1 7 power supply assembly 1 6 Receiver 2 10 2 14 manually opening 4 5 Recommended spares list 4 2 Removal procedure TZ87 B 1 Removing FRUs 4 1 Replacing FRUs 4 1 Reset Load Unload button 2 1 Retry Algoritm 5 6 S SCSI bus 1 7 1 11 SCSI bus termination 5 1 SCSI ID switch and cable removal B 1 SCSI level 1 test 5 6 SCSI level 2 test 5 6 SCSI tests 5 6 Securing the TZ877 subsystem A 8 Service aids 4 1 4 4 Service features 1 10 Service mode unlocking the subsystem 2 17 Shipping restraint 4 4 Slot Select button 2 6 operation 2 6 Soft error rates 3 4 Spares 4 1 Specifications TZ877 subsystem 1 11 TZ87 tape drive 1 13 Streaming read test 5 5 Streaming write test 5 5 Stream test 5 6 Subsystem description 1 1 Subsystem FRUs 4 1 T Takeup leader removal and replacement 4 18 Tape leader in cartridge 3 2 Index 3 TESTO1 test 5 6 TESTO2 test 5 6 TK85 tape drive access for read write head cleaning A 5 cartridge entrance A 5 Tro
67. reliminary Steps reri ded do ee ENEE ee ew B 1 B 1 1 Removing the Enclosure Top 0 00 eee eeee B 1 B 1 2 Removing the Fan 0 cece eee eens B 1 B 1 3 Removing the SCSI ID Switch and Cable B 1 B 1 4 Removing the Internal SCSI Bus Cable B 2 B 1 5 Removing the Controller Module 04 B 2 B 1 6 Removing the Power Supply 0 00 0 eeu eeee B 2 B 1 7 Removing the Drive 0 0 0 ccc eee eee B 2 Index Figures 1 1 Front View of the TZ877 Operator Control Panel 1 3 1 2 TZ877 Magazine Tape Subsystem Hardware Components 1 5 1 3 Front View of the Magazine Tape 00005 1 6 1 4 CompacTape III Cartridge 0 0 cece eee 1 9 2 1 TZ877 Operator Control Panel 0 00005 2 5 2 2 Front View of the TZ877 Magazine 000 2 9 2 3 Removing the Magazine from the Open Receiver 2 11 2 4 Write Protect Switch on the CompacTape III 2 12 2 5 Inserting a Cartridge into the Front of the Magazine 2 13 2 6 Removing a Cartridge from the Front of the Magazine 2 15 2 7 Mechanical Stops Associated with Service Mode Newer Models came kalee E a a Bake Se EERE E kau ae haw 2 18 2 8 Mechanical Stops Associated with Service Mode Older Modelja occa eto dudes bee bate ads bun elo Seed 2 19 2 9 TZ87 Front Panel isareti ia vee a ee ee a 2 23 3 1 Opening the Cartridge Door to Check the Tape Leader
68. reset through a power cycle or from the terminal server Reset is indicated when the green indicator is not lit The yellow indicator flashes during the tests and if POST completes successfully and the operational firmware initializes correctly the green indicator lights 5 1 1 Burn in Loopback Mode POST diagnostics normally notify the executive that starts the rest of the controller operating system However a loopback feature is available At the start of testing the state of the burn in pin is saved At the end of testing and before the executive is notified the diagnostics test the saved state If the burn in is true POST loops Detailed test information is printed at the start of testing if the burn in connector is present The jumper is removed while POST is executing 5 1 2 SCSI Bus Termination POST requires that the SCSI bus be properly terminated and powered If the device is not connected to a SCSI bus the internal terminating resistors must be installed in the terminator position and the terminator power jumper must be installed in the PWR position If the device is connected to a SCSI bus the bus must be terminated according to SCSI termination requirements If the SCSI bus is not terminated POST will not execute This is indicated by the status of the controller indicators The green OK indicator flashes and the yellow ACTIVE indicator lights continuously If the indicators are as above terminate the SCSI bu
69. ribes the various TZ877 operating procedures 2 1 Operator Control Panel The TZ877 operator control panel OCP has 4 pushbuttons and 23 indicators that are used with the Mode Select key Table 2 1 The Mode Select key is described later in this chapter See Section 2 2 for more details on button and indicator operations Table 2 1 TZ877 Operator Control Panel Button Indicator Color State Function Eject button Eject indicator Green On Load Unload button Opens the receiver allowing access to the magazine for removal and insertion of cartridges Also can be used to unload the tape from the drive to the magazine Indicates a magazine fault and that you can press the Eject button to unload cartridges from the drive to the magazine and to open the receiver Loads the currently selected cartridge into the tape drive Unloads the cartridge currently in the tape drive Resets the subsystem if there is a loader fault Continued on next page Operating Procedures 2 1 Operating Procedures 2 1 Operator Control Panel Table 2 1 Continued TZ877 Operator Control Panel Button Indicator Color State Function Load Unload indicator Green On Indicates you can press the Load Unload button Slot Select button Increments the current slot indicator to the next slot Slot Select indicator Green On Indicates you can press the Slot Select button Pressing this button moves the current sl
70. s to allow POST to execute and start the operational firmware if no other errors are detected TZ87 Diagnostic Utilities and Tests 5 1 TZ87 Diagnostic Utilities and Tests 5 1 POST 5 1 3 POST Terminal Server The diagnostic terminal attached to the controller prints information about the run of the tests During normal operation the test currently running is the last test printed Any failures detected may be due to the last test running except for one instance when an unexpected interrupt is generated the error lists the cause of the interrupt The header displays that it was an unexpected interrupt The POST terminal server supports the following commands e Control C Clears the POST pass count e Control H Halts POST and resets the controller to start again Use this command only after an error is detected Do not disconnect or cycle the power supply e Control P Prints the POST pass count 5 1 4 Lastfail Information There may be additional information about the failure This information is displayed on the terminal and may be useful for diagnosing the cause of the failure Currently there is additional failure information displayed on the diagnostic terminal for 1 RAM Mach II pattern testing on the RAM buffers microprocessor and EZ The expected and actual data patterns as well as the physical hardware address of the miscompare is displayed 2 ROM EDC test The expected and calculated EDC are displayed 3 R
71. sembly back into the side of the rear chassis Place the handle motor coupling shaft back into its opening Be sure to fully seat it to ensure that the subsystem closes properly Carefully place the connector wires inside the cable clamp thread the connectors through the metal cutout Align and connect the connector plugs to the power distribution panel Replace the intermediate bezel and fasten the captive screws FRU Removal and Replacement Procedures 4 25 FRU Removal and Replacement Procedures 4 11 Removing and Replacing the Handle Motor Assembly 6 Close the magazine tape subsystem 4 12 Removing and Replacing the Mode Select Key Lock Removal Procedure 1 2 3 8 Open the rear door of the enclosure down the TZ877 subsystem From the rear push the TZ877 subsystem to the first mechanical stop Open the cable clamp on the left side Figure 4 6 of the loader transfer assembly to release the cable wires Loosen the captive screw of the top protective panel and remove the panel Figure 4 16 Detach the 3 pin plug by sliding it from the 3 pin connector NOTE To avoid breaking connections detach the plug from the top rather than pulling the wires from the bottom of the connector Set the Mode Select key to the OCP Disabled position and remove the key from the key lock switch Loosen the two mounting screws Figure 4 16 of the key lock switch bracket NOTE The key lock switch bracket does n
72. significant than an absolute number of soft errors This is due to the variables described in Table 3 2 3 4 Troubleshooting Procedures Troubleshooting Procedures 3 4 Error Conditions When examining the drive error count you can detect soft and hard errors For example an error occurs if you give the wrong label name during a mount Be sure the errors indicate a real hardware problem before replacing the drive 3 4 3 Common Failures Table 3 2 lists common failures their probable causes and possible corrections Table 3 2 Common Failures Causes and Corrections Symptom Probable Cause Possible Fix Failure to mount or Bad media or dirty head Clean the head and retry initialize with new media with another cartridge OCP pushbutton Drive failed POST or Attempt to clear the error by indicators blinking detected a hard error pressing the Unload button during operation Green indicator on drive Drive leader unhooked in blinking drive Calibration error Mispositioned cartridge leader Cartridge stuck in drive Hard drive error with tape on takeup reel on the drive If the error does not clear you have a drive hardware failure or a power problem Clear the error by pressing the Unload button on the drive or the Load Unload button on the OCP Inspect the cartridge leader for correct position Do not use the cartridge if you cannot reposition the leader Figure 3 1 Try another cartridge If the error
73. ssing the unload button e When the drive beeps and the green Operate Handle indicator lights you can remove the cartridge by lifting the drive handle e Remove the cartridge e Reinsert the magazine and close the receiver 3 5 1 1 Clearing a Magazine Fault To clear a magazine fault press the Eject button to open the receiver and remove the magazine Remove the cartridge from the drive or elevator if present Close the receiver and the drive controller clears the magazine fault While the magazine is out make sure there are no retention flags showing in empty slots After the fault clears try loading and unloading cartridges to verify operation 3 5 2 Loader Fault Description A loader fault indicates the TZ877 subsystem detected a fatal error in either the loader transfer assembly or the tape drive In some loader transfer assembly errors the subsystem attempts three retries before declaring a fatal error All loader faults generate an error log cause the Loader Fault indicator to light and generate an associated subcode The Loader Fault indicator displays both loader and drive errors The presence of a fault is displayed by the following slot indicators e Slots 4 and 0 light to indicate a controller module fault Troubleshooting Procedures 3 7 Troubleshooting Procedures 3 5 Magazine and Loader Faults e Slots 5 and 0 light to indicate the loader detected a fault e Slots 6 and 0 light to indicate a drive fault NOTE
74. tape and either the storage capacity of the last cartridge is exceeded or no cartridge is in the next sequential slot in the magazine To lock the TZ877 subsystem into the enclosure and lock the receiver set the Mode Select key to OCP Disabled mode The OCP pushbuttons are disabled Automatic mode Is the default or normal mode of the TZ877 This mode automatically loads and unloads cartridges as necessary during backup procedures Operations stop if you are copying data to tape and either the storage capacity of the last cartridge is exceeded or no cartridge is in the next sequential slot in the magazine To lock the TZ877 subsystem into its normal operating position in the enclosure but leave the receiver unlocked set the Mode Select key to Automatic mode The receiver can be opened and the OCP pushbuttons are enabled Manual mode Automatic loading and unloading of cartridges does not occur You must press the Load Unload button to move cartridges This mode is most useful for but not restricted to copying specific files to or from tape To lock the TZ877 into the enclosure set the Mode Select key to Manual mode The receiver is unlocked and can be opened the OCP pushbuttons are enabled NOTE During Manual mode the cartridge returns to the magazine but the current slot indicator does not advance to the next available cartridge 2 16 Operating Procedures Operating Procedures 2 4 Mode Select Key
75. test 5 5 G Guidelines for removing and replacing FRUs 4 4 H Handle motor assembly removal and replacement 4 24 Hardware components 1 4 Head cleaning procedure A 1 securing the subsystem A 8 Index 2 Indicators all blinking 3 5 green blinking 3 5 yellow on 3 5 Initialization 2 17 loader transfer assembly 2 21 subsystem 2 18 2 21 Internal SCSI bus cable removal B 2 L Lastfail information 5 2 Loader controller module 1 4 Loader fault 3 6 clearing 3 8 description 3 7 Loader open latch A 7 Loader read all test 5 6 Loader streaming write read test 5 6 Loader transfer assembly elevator mechanics electronics 1 4 removal and replacement 4 9 Load Unload button 2 6 reset function 2 1 LTSTO09 test 5 6 LTST11 test 5 6 Magazine 1 5 2 10 inserting cleaning tape A 9 removal from receiver 2 10 restoration into receiver 2 14 Magazine fault 3 6 clearing 3 6 3 7 description 3 6 Magazine status 3 6 Manually rewinding a tape 2 8 Manual mode 2 16 Mechanical stop first 4 5 second 4 14 Mechanical stops 2 17 Mode Select key 2 16 Automatic mode 2 16 Manual mode 2 16 mode definitions 2 16 OCP Disabled mode 2 16 Service mode 2 17 Mode select switch removal and replacement 4 26 Modes of operation 1 1 O OCP operator control panel 1 4 OCP Disabled mode 2 16 Operating modes 2 16 Operating procedures 2 1 Ope
76. to open the receiver FRU Removal and Replacement Procedures 4 17 FRU Removal and Replacement Procedures 4 6 Removing and Replacing the TZ87 Tape Drive 3 Install a field test cartridge tape into slot 0 at the front of a spare magazine Be sure that the cartridge s write protect tab is next to the slot number on the front of the magazine 4 Install the spare magazine into the receiver Execute LDRTST Secure the rear door of the SF100 SF200 or SF300 storage array 4 7 Removing and Replacing the TZ Takeup Leader Removal Procedure 1 Remove the TK TZ drive from the enclosure Refer to the previous section CAUTION Contamination from hands could cause increased error rates Put on cloth gloves to prevent oils and grease from contaminating the tape path 2 At the rear of the drive loosen the two screws that secure the metal module clip Remove the clip that holds the controller in place from the top of the drive dust cover NOTE In the TZ877 subsystem the controller is not mounted on the drive The metal module clip may not be present 3 Remove the dust cover Figure 4 12 first by pulling on the tab of the center rear clip and undoing the clip Undo the left front clip and the front center clip You can use a finger or screwdriver to undo the clips Each clip is next to a small slot that fits a screwdriver 4 Ifthe drive leader is connected to the hook push on the hook s back end Figure 4 13
77. to the tape cartridge the current media density is used 1 5 Service Features The TZ877 has these service features e Power on self testing for the electronics and mechanics associated with the loader transfer assembly the tape drive and the controller module e Automatic calibrating of the tape drive e Automatic home positioning of the elevator e Mechanical design that allows access to most field replaceable units e Local diagnostic programs for troubleshooting 1 10 Overview 1 5 1 Controller Module Overview 1 5 Service Features The TZ877 connects to the host system through a SCSI bus The physical interface is an electronic controller module in the rear chassis of the TZ877 subsystem The subsystem uses a serial communications path to pass commands messages data and error information between the controller module and the loader transfer assembly A second serial communications path exists between the controller module and the TZ87 tape drive 1 6 Specifications Table 1 2 lists the specifications for the TZ877 magazine tape subsystem and Table 1 3 lists those for the TZ87 tape drive Table 1 2 TZ877 Magazine Tape Subsystem Specifications Characteristic Specifications Height Width Length Weight Noise level Environmental temperature Operating Nonoperating Humidity Operating Nonoperating Certification EMI Safety Maximum number of cartridges Electrical rating 26 47 cm 10 42
78. tor is lit press Load Unload to reset the TZ877 subsystem 2 2 1 Selecting a Cartridge To select a cartridge Press the Slot Select button to advance the slot indicator to the next available slot After successful initialization the TZ877 subsystem automatically selects the first slot that has a cartridge and the Slot Select button becomes active The Load Unload and Eject indicators remain lit during slot selection 2 2 2 Loading the Cartridge Press the Load Unload button to load the cartridge into the drive If no cartridge is loaded the Select Slot Load Unload and Eject indicators turn off and the elevator moves to the selected slot shown by the indicator The cartridge is then removed from the magazine and placed in the elevator The elevator moves to the drive position and inserts the cartridge into the drive The indicators remain off until the tape loads to the beginning of tape BOT After the cartridge is loaded into the drive the Eject and Load Unload indicators light and the corresponding buttons are enabled The Slot Select indicator remains off 2 2 3 Selecting Density NOTE The only time you can change tape density is on a write from BOT You cannot change tape density on a read operation 2 6 Operating Procedures Operating Procedures 2 2 Slot Select Load Unload Eject and Density Select Button Functions Modes of Selecting Density You can select density by any of these modes 1 Use
79. tors B 1 5 Removing the Controller Module To remove the controller module 1 Disconnect the internal cables connected to the controller module 2 Press the two metal locking tabs at the rear of the controller module to release the module B 1 6 Removing the Power Supply To remove the power supply 1 Loosen the two captive screws securing the power supply 2 Place the power supply outside the enclosure 3 Disconnect the input power wires 4 Release the input power wires from the power supply housing by squeezing the grommet that secures the cables to one another 5 Cut the tie wraps to release the output power wires from the housing B 1 7 Removing the Drive To remove the drive e Remove the controller module Section B 1 5 e Disconnect the power cable and the drive to controller cable from the drive e Remove the two screws on the left that secure the drive bracket to the enclosure floor e Align the bracket keyholes with the screws and lift the drive bracket assembly from the enclosure e Remove the bracket from the drive B 2 1TZ87 Removal and Replacement Procedure A Automatic mode 2 16 BACKUP Automatic mode 2 16 Backup failures 3 2 BREAK key operation 5 2 Burn in loopback mode 5 1 C Cartridge loading 2 6 Cartridge compatibility read write ability 1 9 Cartridge motion faults 3 8 isolating 3 9 Cartridge recovery 3 11 Cartridge removal 2 8 Cleaning procedure for read write he
80. ubleshooting 3 1 TX87 tape drive POST 2 22 TZ87 POST 5 1 Index 4 TZ87 tape drive removal and replacement 4 12 TZ87 test descriptions 5 3 TZX87 removal and replacement procedure B 1 W Write protect switch 2 12 Write read test 5 5

TZ877 Magazine and Cartridge Tape Subsystem Service Manual

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