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StorageWorks RW551 Service Manual

Medium optical disk library
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Medium Optical Disk Library
(RW551/RW552)
Service Manual
EK–MOL80–SV. B01
Digital Equipment Corporation
Maynard, Massachusetts

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  • Page 1 Medium Optical Disk Library (RW551/RW552) Service Manual EK–MOL80–SV. B01 Digital Equipment Corporation Maynard, Massachusetts...
  • Page 2 Digital Equipment Corporation or its affiliated companies. The following are trademarks of Digital Equipment Corporation: the DIGITAL logo and StorageWorks. The following are third-party trademarks: Microsoft and MS-DOS are registered trademarks of Microsoft Corporation.

  • Page 3: Table Of Contents

    Unpacking & Taking the Jukebox Off the Pallet.......2–3 Tools Required .................2–3 Product Configuration and Operation Connections to the RW551/RW552 Jukebox ............3–1 Configuring and Operating the Jukebox ..............3–3 Connecting an Uninterruptable Power Supply (UPS) ..........3–3 Connecting the SCSI Cable to the Jukebox ..........3–4 Connecting Power..................3–5...
  • Page 4 Medium Optical Disk (RW551/RW552) Library Product Configuration and Operation ( continued Moving the Jukebox a Short Distance .............. 3–22 Shipping the Jukebox ..............3–23 Host Configuration ................... 3–23 Troubleshooting and Diagnostics Operation / Installation Troubleshooting ............4–1 Troubleshooting Using the Control Panel and Observation ......4–1 The Autochanger Lists the First "Possibles"...
  • Page 5 Contents Removal and Replacement ( continued Replacing the Controller PCA..............5–35 ............Replacing the Internal SCSI Cable Replacing the SCSI Interface PCA............. 5–38 Re–initializing the Jukebox Controller PCA RAM After Service ....5–40 Field Replaceable Units (FRUs) in the Medium Library......5–42 Recommended Service Kits ...............5–44 Miscellaneous ....................5–52 Theory of Operation Autochanger Robotics..................6–2...
  • Page 6 SCSI Command Set..................6–37 Appendix A Basic Supplies and Reorderable Parts Basic Supplies & Reorderable Parts..............A–1 Related Documents.................... A–2 Figures 1–1 RW551 & RW552 Jukebox ..............1–1 2–1 Clearance Requirements................2–1 2–2 Installing the Ramp Onto the Pallet ............2–3 3–1 Front Panel ....................
  • Page 7 Contents Figures ( continued 5–2 Rear Access Panel ...................5–5 5–3 Center Cover Mounting Screw ..............5–6 5–4 Positioning the Control Display Before Removing the Panel ....5–7 5–5 Accessing the Underside of the Control Panel ..........5–8 5–6 Disconnecting the Control Panel Cable ............5–9 5–7 Removing the Front Right Panel ..............5–9 5–8...
  • Page 8 Medium Optical Disk (RW551/RW552) Library Figures ( continued 5–37 Disconnecting the Drive Rope From a Tensioner ........5–32 5–38 Two Ends of the Slave Rope In the Tensioner ........5–33 5–39 Disconnecting the 3–Rope Coupler ............5–33 5–40 Rear Side Of Vertical Motor Gear Box........... 5–34 5–41 The Rope and Pulley System..............
  • Page 9 4–2 Operation Errors ..................4–9 4–3 Hardware Errors and Recovery Procedures ..........4–14 4–4 Micro–Move IDs ..................4–25 4–5 Available Internal Tests for the RW551 and RW552 ....... 4–34 5–1 List of Field Replaceable Units..............5–42 5–2 Exchange Parts ..................5–44 5–3 Non-Exchange Parts ................. 5–45 5–4 Common Resource Parts................5–52...
  • Page 10 Revision Record This Revision Record provides a concise publication history of this guide. It lists the guide revision levels, release dates, and reasons for the revisions. It also describes how the changes to affected pages are marked in the guide. Revision Level Date Summary of Changes...

  • Page 11: About This Manual

    About This Manual This manual describes how to install, configure, and maintain medium optical disk library RW551/RW552. The manual also discusses the theory of operation of the library. Audience This manual supports trained service personnel for the medium optical disk library (also referred to as the “jukebox”) RW551/RW552.
  • Page 12 Medium Optical Disk (RW551/RW552) Library Chapter 6: Theory of Operation Describes how the RW551/RW552 works and the relationship between the mechanical operation and command set execution. Appendix A: Basic Supplies and Re-orderable Parts A listing of common parts and other optical disk library manuals which may be beneficial to the reader.
  • Page 13 About This Manual CAUTION Caution calls attention to operating procedure or practice which could result in damage to the product if not correctly performed. Do not proceed beyond this symbol until you fully understand and meet the indicated conditions. WARNING Warning calls attention to a procedure or practice which could result in personal in-jury if not correctly performed.

  • Page 14: Product Information

    This chapter provides general product information and lists important features and speci- fications. A matrix of environment specifications provide parameters for several sub- assemblies. Figure 1–1 RW551/RW552 Jukebox Product Features The SCSI-connect version of the RW551, RW552 optical disk jukeboxes have the following features: • direct online access to data •...
  • Page 15 Medium Optical Disk (RW551/RW552) Library • SCSI Interface • single-ended or differential • SCSI-2 command set • autochanger reliability of: • 100,000 hours MTBF (Mean Time Between Failure) • 1,000,000 MSBF (Mean Swaps Between Failure) • modular replacement of all major assemblies •...

  • Page 16: The Optical Drive Mechanism

    Chapter 1. Product Information Table 1–1 Optical Disk Standards Met by Digital Optical Disks Type Capacity/Format Standard Rewritable 594 Mbyte 512 bytes/sector Meets ANSI and ISO standards for Con- 650 Mbyte tinuous – Composite (CC) format – con- 1024 † bytes/sector forms to ISO/IEC DIS 10089A;...

  • Page 17: Product Support

    Medium Optical Disk (RW551/RW552) Library Product Support Host support for the jukebox is continually expanding; therefore, specific host system support cannot be provided accurately in this manual. However, host system support is documented in the current Product Service Plan and applicable Software Product Descriptions (SPD).
  • Page 18 Chapter 1. Product Information Technical Characteristics (Drive) RWZ53 Drive Read transfer rate - max, sustained - for 1,024 bytes/sector up to 1.69 Mb/s (4X disks) up to 1.24 Mb/s (2X Mb disks) up to 1.04 Mb/s (1X disks) Write transfer rate- max, sustained - for 1,024 bytes/sector up to 0.84 Mb/s (4X disks) up to 0.62 Mb/s (2X disks)
  • Page 19 Medium Optical Disk (RW551/RW552) Library Humidity (non-condensing) Autochanger Drive Media Operating (relative) 10 to 90% 5 to 90% 10 to 80% Non-operating w/o disk 5 to 95% 5 to 95% 10 to 90% Maximum wet bulb 29°C 29°C 29°C Shock (non-operating)
  • Page 20 Chapter 1. Product Information Cooling requirements 15 CFM bi-directional through drive Power Requirements Line voltage 100-240V Line frequency 50-60Hz Power consumption (typical) 240 W 819.1 BTU Power consumption (maximum) 275 W 938.5 BTU Service Characteristics Mean time between failure 80,000 power-on hours Mean swaps between failure 600,000 Mean time to repair...
  • Page 21 Medium Optical Disk (RW551/RW552) Library Recording Characteristics (continuous-composite format) Formatted Capacity Bytes per sector 1024 (512) 1024 (512) 1024 (512) Sectors per logical 17 (31) 17 (31) 17 (31) track Logical tracks 18,751 37,473 (37,527) 75,732 (73,732 per surface Archival life...

  • Page 22: Environmental/Installation/Pm

    Environmental/Installation/PM This chapter describes the optical disk jukebox environmental requirements and installation procedures. Environmental Requirements This optical disk jukebox is designed to operate with an ambient air temperature range of 10° to 40° C (50° to 104° F) with a rate of temperature change not to exceed 10°...

  • Page 23: Location Requirements

    Installation and configuration information is in the following manuals: • Medium Optical Disk (RW551/RW552) Library Service Manual (this manual), Chapters 2 and 3. • Optical Disk Jukebox Family User's Guide (EK–RW551–UG).

  • Page 24: Unpacking & Taking The Jukebox Off The Pallet

    Chapter 2. Environmental/Installation/PM If the unit is damaged, it will be repaired or replaced. The cause of damage will be determined by the field service representative. Problems determined to be caused by factory packaging should be reported, in detail, to the factory so a warranty claim can be submitted. Be sure to include the product number and full serial number in any correspondence with Digital concerning the unit.
  • Page 25 Medium Optical Disk (RW551/RW552) Library b. Place the ramp with the 2 x 2 wood strips facing up onto the pallet with the holes on the end of the ramp aligning with the two holes in the pallet. c. Insert the bolts through these holes. (It is not necessary to tighten these bolts.)

  • Page 26: Connections To The Rw551/Rw552 Jukebox

    Product Configuration and Operation This chapter provides information about the operational control on the jukebox and how to use those controls to configure and operate the jukebox. Connections to the RW551/RW552 Jukebox Figure 3–1 Front Panel EK–MOL80–SV. B01 3–1...

  • Page 27: Rear Panel (Scsi Connect)

    Medium Optical Disk (RW551/RW552) Library Figure 3–2 Rear Panel (SCSI-Connect) 3–2 EK–MOL80–SV. B01...

  • Page 28: Configuring And Operating The Jukebox

    For the current list of which host systems support the SCSI-bus jukebox, refer to the RW551/RW552 Product Service Plan. Connecting an Uninterruptable Power Supply (UPS) To fully protect against data loss in the event of a power failure, Digital recommends the use of an uninterruptable power supply (UPS).

  • Page 29: Connecting The Scsi Cable To The Jukebox

    Medium Optical Disk (RW551/RW552) Library If a power failure occurs during a write operation, the UPS must be able to continue to supply power to the jukebox/computer system until the data in the optical drive's buffer can be written to an optical disk.

  • Page 30: Connecting Power

    Chapter 3. Product Configuration and Operation Table 3–2 SCSI Cable Length Limitations Interface Type Allowable Cable Length Single-Ended SCSI 6 meters Differential SCSI 15 meters NOTE Because of signal delays inside the jukebox, the allowable external cable length differential SCSI interface mode is limited to 15 meters instead of the 25 meters typically available with a differential SCSI bus.

  • Page 31: The Jukebox Control Panel

    Medium Optical Disk (RW551/RW552) Library 4. Plug the power cord into the power outlet. 5. Press the power switch located on the top right end of the jukebox to ON. Initially, the control panel displays . Once the power-on test TESTING completes (approximately 1.5 minutes), the control panel displays...

  • Page 32: Using Selection Buttons

    Chapter 3. Product Configuration and Operation 1 Swivel Feature Allows the control panel to be turned to face towards the front of the jukebox or towards the mailslot side of the jukebox. 2 Selection Buttons Pressed to perform the following operations: •...
  • Page 33 Medium Optical Disk (RW551/RW552) Library Second-Level Messages A security code is required to access the second-level options. See “Entering the Administration Level” after the following menu trees. - select to run internal jukebox tests TEST * INFO * - (information) select to retrieve performance...

  • Page 34: Control Panel Menu Tree

    Chapter 3. Product Configuration and Operation Figure 3–4 Control Panel Menu Tree EK–MOL80–SV. B01 3–9...
  • Page 35 Medium Optical Disk (RW551/RW552) Library Viewing and/or SCSI Ids and Logical Unit Numbers (LUNs) The initial keypress sequence is: ADMIN * READY SCSI ID’s * To view SCSI IDs and LUNs – 1. Press ENTER. 2. VIEW ID’S* displays. Press ENTER.

  • Page 36: Default Scsi And Lun Settings

    Chapter 3. Product Configuration and Operation Table 3–3 Default SCSI and LUN Settings LUN MODE OFF (default) LUN MODE ON SCSI ID SCSI ID JKBX ID DRV 1 ID DRV 2 ID DRV 3 ID* DRV 4 ID* * 160fx models only NOTE The LUN numbers are pre-assigned and may not be changed.
  • Page 37 Medium Optical Disk (RW551/RW552) Library NOTE The SCSI ID 7 is reserved for service use on the external SCSI port. The initial keypress sequence is: ADMIN * READY SCSI ID’s * 1. Press ENTER. SET ID’s displays. Press ENTER. 2. VIEW ID’s displays. Press NEXT until SET ID’S * displays and press ENTER.

  • Page 38: Changing An Optical Drive Scsi Address

    Chapter 3. Product Configuration and Operation 7. Press CANCEL until READY displays. NOTE After an address is changed, the computer may have to be restarted for the new addresses to be recognized. The new settings can be saved to ROM by power cycling the jukebox.
  • Page 39 Medium Optical Disk (RW551/RW552) Library 1. With READY displayed, press NEXT until ADMIN# appears in the display window. NOTE A three-part security code is required to access any options beneath ADMIN. The security code is set to 0,0,0 at the factory, but...

  • Page 40: Changing A Configuration Option

    Chapter 3. Product Configuration and Operation Changing a Configuration Option 1. With READY displayed, press NEXT until ADMIN* appears in the display window. NOTE A three-part security code is required to access any options beneath ADMIN. The security code is set to 0,0,0 at the factory, but you should encourage the customer to change this as soon as possible to avoid access by unauthorized persons.
  • Page 41 Medium Optical Disk (RW551/RW552) Library Table 3–5 Configuration Choices ( continued Configuration Name Description DUAL PICKER ON/OFF Toggles between ON and OFF. Default setting is DUAL PICKER ON. If the configuration is set to ON, the jukebox runs with dual picker (disk transport) addressing ON ;...
  • Page 42 Chapter 3. Product Configuration and Operation Table 3–5 Configuration Choices ( continued Configuration Name Description NEW PASSWORD Allows changing the security code through the control panel. The password allows access to configurations, tests, and information logs. Setting the security code is explained in "Setting a New Security Code"...

  • Page 43: Loading An Optical Disk Into The Jukebox

    Medium Optical Disk (RW551/RW552) Library Table 3–5 Configuration Choices ( continued Configuration Name Description POWER SECURE ON/OFF Toggles between ON and OFF. When set to ON the SECURE ON/OFF configuration setting is retained in the event of a power outage.
  • Page 44 Chapter 3. Product Configuration and Operation 1. With READY displayed, insert a cartridge into the mailslot. The shutter end of the cartridge goes in first. Side A should be facing up. Push the cartridge in gently until it is fully inserted into the mailslot. ("##"...

  • Page 45: Ejecting An Optical Disk From The Jukebox

    Medium Optical Disk (RW551/RW552) Library Ejecting an Optical Disk from the Jukebox NOTE Some software packages require that disks be inserted and removed using the software. Check with the system administrator to determine if the software used to manage disks in the jukebox requires ejection under software control.
  • Page 46 Chapter 3. Product Configuration and Operation NOTE There are several conditions that may prevent an optical disk from being ejected: If there are no disks in the jukebox storage slots, EMPTY is displayed briefly, and then EJECT* displays. If the host system computer has a disk reserved.

  • Page 47: Setting A Security Code

    Medium Optical Disk (RW551/RW552) Library Setting a Security Code A security code of 0-0-0 is set at the factory. This three-part security code is required to access any options beneath ADMIN. You should encourage the customer to change this as soon as possible to avoid access by unauthorized persons.

  • Page 48: Moving The Jukebox A Short Distance

    Chapter 3. Product Configuration and Operation Moving or Shipping the Jukebox To move the optical jukebox a short distance (down the hallway or to another floor in the building), use the steps in "Moving the Jukebox a Short Distance." If you want to ship this jukebox, see "Shipping the Jukebox"...

  • Page 49: Shipping The Jukebox

    Medium Optical Disk (RW551/RW552) Library 8. Connect the jukebox to the host. 9. Reconnect the power cord. 10. Lower the leveler feet using a 1/2-inch wrench. 11. Configure the jukebox to the host. (Refer to the host system manuals for configuration information.)

  • Page 50: Host Configuration

    To determine if the host you are connecting to supports this device and for further installation information, check the following documents: • RW551/RW552 Product Service Plan • Host system documentation •...

  • Page 51: Troubleshooting And Diagnostics

    Troubleshooting and Diagnostics This chapter contains troubleshooting information about the SCSI-connect. Operation/Installation Troubleshooting Troubleshooting Using the Control Panel and Observation When there are errors in autochanger movements, two main approaches are available to get information and to run exerciser tests. The approach usually depends on whether the error encountered was a hard error or whether it was a soft (intermittent, recoverable) error.

  • Page 52: The Autochanger Lists The First "Possibles

    Medium Optical Disk (RW551/RW552) Library The Autochanger Lists the First "Possibles" At power on, and after every failed move, the autochanger automatically runs an initialization sequence that comprehensively tests the autochanger. If a hard failure occurs, a list of possible FRUs (Field Replaceable Units) that may have been at fault is returned.

  • Page 53: Retrieving Performance Information

    Chapter 4. Troubleshooting and Diagnostics Figure 4–2 How Service Views the Suspect FRUs If you consider the suspect FRU as a POINTER to the problem area rather than the problem itself, an educated visual inspection, with perhaps some cable and connector wiggling, should reveal the real problem.

  • Page 54: Information Logs

    Medium Optical Disk (RW551/RW552) Library 3. TEST*displays. Press NEXT until INFO* displays, and then press ENTER. 4. Press NEXT until the name of the log you wish to access displays and then ENTER ( An "*" indicates that there are more choices beneath the displayed choice.)
  • Page 55 Chapter 4. Troubleshooting and Diagnostics Table 4–1 Information Logs ( continued Log Name Description SOFT ERRORS * Returns either "NO SOFT ENTRIES" or "ENTRY #". (There may be multiple soft error numbers.) Press ENTER to select the soft error number you wish to view logs for. (The available logs are described in the rows following "RECOVERY ERROR"...

  • Page 56: Getting Error Information Through The Scsi Bus

    Medium Optical Disk (RW551/RW552) Library Table 4–1 Information Logs ( continued Log Name Description MICROMOVE 1-6 The IDs of the last six micro-moves for the original move command issued prior to the failure (individually displayed). Step through the micro-move IDs by pressing NEXT or PREV.

  • Page 57: Diagnostics

    Chapter 4. Troubleshooting and Diagnostics Figure 4–3 Information and Tests Through the SCSI Bus Refer to the following information when troubleshooting through the SCSI bus: Offline Diagnostics for Hewlett-Packard Optical Products (reference Appendix A for ordering information). This guide contains information about Hewlett-Packard's offline diagnostic, DOSDASS4, which can be used to access the above information through the SCSI bus.

  • Page 58: Offline Diagnostics

    Medium Optical Disk (RW551/RW552) Library The two types of diagnostics available for the jukebox are: • Offline Diagnostics - Hewlett-Packard offers a diagnostic program called DOSDASS4 for use with the optical disk jukebox. These diagnostics can be obtained from the Digital Customer Support Center at CXO. This PC-based diagnostic program allows you to fully test the autochanger mechanism or the optical drive mechanism.

  • Page 59: Operation Errors

    Chapter 4. Troubleshooting and Diagnostics Table 4–2 Operation Errors Task Problem/Symptom What to do • Communicating Can't get the host to Check to make sure host<-->jukebox recognize the jukebox. the jukebox is supported on the host operating system. • Check to make sure the autochanger was installed and configured as...
  • Page 60 Medium Optical Disk (RW551/RW552) Library Table 4–2 Operation Errors ( continued Task Problem/Symptom What to do Loading Disks Disk inserted in mailslot, Remove the disk from the but the display reads mailslot and try inserting it LOAD ERROR, or again. Push the disk in, MISLOAD.
  • Page 61 Chapter 4. Troubleshooting and Diagnostics Table 4–2 Operation Errors ( continued Task Problem/Symptom What to do Autochanger power fails If you need to remove the while a disk is in the drive. disk before power can be resupplied to the drive, the eject tool can be used to recover the disk.
  • Page 62 Medium Optical Disk (RW551/RW552) Library Table 4–2 Operation Errors ( continued Task Problem/Symptom What to do • Reading/writing Can't write to the disk. Check the file system magneto-optical access permissions. • disks Check the write- protect tab on each disk side to assure write-enabled status.
  • Page 63 Chapter 4. Troubleshooting and Diagnostics Table 4–2 Operation Errors ( continued Task Problem/Symptom What to do • The unit's power failed Power cycle the unit. • while a disk was in the If power on is drive. unsuccessful, power the unit off. Do not move the unit.

  • Page 64: Recovery From Hardware Errors

    Medium Optical Disk (RW551/RW552) Library Recovery from Hardware Errors When a hardware failure occurs, a message is displayed on the control panel. If the failure occurs during the power-on sequence, DEVICE FAILED is displayed. If the failure occurs when loading a disk you may see LOAD ERROR or FULL.
  • Page 65 Chapter 4. Troubleshooting and Diagnostics Table 4–3 Hardware Errors and Recovery Procedures ( continued Error Code Error Description Recovery Procedures (hex.) • Drive 1 connection error Verify if you can see other drives • Switch cables (see if it stays with the drive or cable) •...
  • Page 66 Medium Optical Disk (RW551/RW552) Library Table 4–3 Hardware Errors and Recovery Procedures ( continued Error Code Error Description Recovery Procedures (hex.) Vertical motor error Occurs when trying to sense a move of the carriage assembly) If the translate assembly moves –...
  • Page 67 Chapter 4. Troubleshooting and Diagnostics Table 4–3 Hardware Errors and Recovery Procedures ( continued Error Code Error Description Recovery Procedures (hex.) • Right beam error Check that the space between the picker and magazines is physically clear. • Run the STARWARS test to verify that there is a beam on the right side and the indication changes properly when the...
  • Page 68 Medium Optical Disk (RW551/RW552) Library Table 4–3 Hardware Errors and Recovery Procedures ( continued Error Code Error Description Recovery Procedures (hex.) • Move to Vertical motion failed in the middle of a move or exchange. • Look at the micro-move error of...
  • Page 69 Chapter 4. Troubleshooting and Diagnostics Table 4–3 Hardware Errors and Recovery Procedures ( continued Error Code Error Description Recovery Procedures (hex.) Test magazine Failed testing the magazine portion during an ISTAT. • Look at the micro-move error of the failure in the error log (under INFO*, and Hardware Error in the control panel display).
  • Page 70 Medium Optical Disk (RW551/RW552) Library Table 4–3 Hardware Errors and Recovery Procedures ( continued Error Code Error Description Recovery Procedures (hex.) • Test drive Look at the micro-move error of the failure in the error log (under INFO *, and Hardware Error in the control panel display).
  • Page 71 Chapter 4. Troubleshooting and Diagnostics Table 4–3 Hardware Errors and Recovery Procedures ( continued Error Code Error Description Recovery Procedures (hex.) Test picker This may appear when testing for a cartridge in the picker during an ISTAT. • Replace picker Switch active picker Replace picker Restore picker...
  • Page 72 Medium Optical Disk (RW551/RW552) Library Table 4–3 Hardware Errors and Recovery Procedures ( continued Error Code Error Description Recovery Procedures (hex.) Find plunge home We know that we can move the plunge motor. We know that that we can move...
  • Page 73 Chapter 4. Troubleshooting and Diagnostics Table 4–3 Hardware Errors and Recovery Procedures (continued) Error Code Error Description Recovery Procedures (hex.) Wait vertical Vertical motion failed in the middle of a move or exchange. • Look at the micro-move error of the failure in the error log (under INFO *, and Hardware Error in the control panel display).
  • Page 74 Medium Optical Disk (RW551/RW552) Library Table 4–3 Hardware Errors and Recovery Procedures ( continued Error Code Error Description Recovery Procedures (hex.) • External SCSI cables Check for correct terminator (single-ended or differential) for the type of SCSI interface chosen. •...

  • Page 75: Micro-Move Ids

    Chapter 4. Troubleshooting and Diagnostics Table 4–4 Micro-Move IDs ID (hex.) Description Move picker transport up. Fast. Move picker transport down. Fast. Move picker transport up slowly, looking for resistance. Used in vertical find home sequence. Move picker transport down slowly, looking for resistance. Used in vertical find home sequence.
  • Page 76 Medium Optical Disk (RW551/RW552) Library Table 4–4 Micro-Move IDs ( continued ID (hex.) Description Move to one side of the translate frame. Used to find translate home. Move a short distance back from the plunge position where an overforce shutdown error occurred. Relaxes the tension.
  • Page 77 Chapter 4. Troubleshooting and Diagnostics Table 4–4 Micro-Move IDs ( continued ID (hex.) Description First time "get" plunge into a drive. Slow. Feels for resistance to learn the distance to the cartridge when it is seated. Fast "put" plunge into a drive (distance has been previously learned).
  • Page 78 Medium Optical Disk (RW551/RW552) Library Table 4–4 Micro-Move IDs ( continued ID (hex.) Description Retract thumbs back into the picker. Used in error recovery. Is an attempt to pull a cartridge out of the vertical picker path and into the picker. Either this micro-move or micro-move 8D is used, depending on position of the picker at the start of recovery.
  • Page 79 Chapter 4. Troubleshooting and Diagnostics Table 4–4 Micro-Move IDs ( continued ID (hex.) Description Second part of a two-step move to fully retract the picker plunge assembly. Continues movement of micro-move A5 and brings picker plunge assembly all the way back. Move picker plunge assembly forward a small amount from full retracted position.
  • Page 80 Medium Optical Disk (RW551/RW552) Library Table 4–4 Micro-Move IDs ( continued ID (hex.) Description Retract picker plunge assembly into the picker to a point just short of where the thumbs would be released and unsplay. Used during an ISTAT, with no cartridge in the picker, when the thumbs are splayed and must be kept splayed.
  • Page 81 Chapter 4. Troubleshooting and Diagnostics Table 4–4 Micro-Move IDs ( continued ID (hex.) Description Retract picker plunge assembly after detecting a cartridge in the drive. Used in an ISTAT when there is a cartridge in the picker. Retract picker plunge assembly to a point just short of where the thumbs would be released from their splayed position.
  • Page 82 Medium Optical Disk (RW551/RW552) Library Table 4–4 Micro-Move IDs ( continued ID (hex.) Description Retract picker to rearm position to splay the fingers. Used when an error in the drive acknowledge signal is seen and a drive eject will be done and the thumbs must be in the splayed position.
  • Page 83 Chapter 4. Troubleshooting and Diagnostics Table 4–4 Micro-Move IDs (continued) ID (hex.) Description Plunge to a position where the mailslot rotation actuator can be pulled in. Plunge to a position where the mailslot rotation actuator can be pushed out. Move picker plunge assembly to a position where the mailslot rotation actuator can be engaged to rotate the mailslot out.

  • Page 84: Running An Internal Test

    4. Press NEXT until the name of the test you wish to run displays and then press. Descriptions of the available internal tests are on the following pages. Table 4–5 Available Internal Tests for the RW551 and RW552 Test Name Description...
  • Page 85 Chapter 4. Troubleshooting and Diagnostics Table 4–5 Available Internal Tests for the RW551 and RW552 ontinued Test Name Description INIT ELEM STATUS Functions the same as the SCSI Initialize Element Status command. This test physically scans the entire unit to determine which storage slots contain disks and if the drives contain disks.
  • Page 86 Medium Optical Disk (RW551/RW552) Library Table 4–5 Available Internal Tests for the RW551 and RW552 continued Test Name Description FIND PLUNGE HOME Runs mechanism recalibration, establishes which picker side is up, and determines the reference points in the picker travel path. This test assumes that the mechanics and servo system are functional.
  • Page 87 Chapter 4. Troubleshooting and Diagnostics Table 4–5 Available Internal Tests for the RW551 and RW552 continued Test Name Description WELLNESS TEST Checks out the general capability of the jukebox. Requires one loaded cartridge; drives and mailslot must be empty. Runs INIT MECHANICS and EXERCISE MECHANICS.

  • Page 88: Optical Disk Cleaning

    Medium Optical Disk (RW551/RW552) Library Table 4–5 Available Internal Tests for the RW551 and RW552 continued Test Name Description TOP THUMB Reports ON or OFF. Looks at the top thumb sensor which reports whether or not the thumb that is currently on the top side of the disk transport mechanism is in the forward position.
  • Page 89 Chapter 4. Troubleshooting and Diagnostics A failure to read a disk may result from: • hardware failure • contamination of the disk surface • contamination of the drive objective lens In a service situation where contaminated disks may be a problem, ensure first that failures are not caused by another, perhaps a hardware failure.

  • Page 90: Using The Eject Tool To Remove A Disk From The Drive

    Medium Optical Disk (RW551/RW552) Library Cleaning Tools Available CAUTION Data may be lost as a result of scratches introduced during optical disk cleaning Cleaning optical disks is not a preventive maintenance procedure and should not be attempted unless disks are obviously dirty.
  • Page 91 Chapter 4. Troubleshooting and Diagnostics You may also use a small flat-head screwdriver with the following dimensions: Length: 50 mm Width: 2.45 mm Thickness: 0.5 mm A disk can be removed from the drive while the drive is still secured in the autochanger.

  • Page 93: Removal And Replacement

    Removal and Replacement Chapter 5 contains removal and replacement procedures. Contents Service Access ....................5–4 Replacing the Power Supplies ............... 5–11 Replacing the Mailslot Assembly ..............5–12 Replacing the Control Panel Assembly............5–13 Replacing an Optical Drive ................5–14 Replacing the Interposer PCA ............... 5–16 Replacing a Cooling Fan ................

  • Page 94: Field-Replaceable Assemblies

    Medium Optical Disk (RW551/RW552) Library Field-Replaceable Assemblies WARNING DO NOT DISASSEMBLE the optical drive mecha- nism. The optical drive mechanism becomes a Class 3B laser device when disassembled. If the drive is disassembled, exposure to the invisible laser beam and hazardous invisible laser radiation could result in blindness.

  • Page 95: Disassembly/Reassembly Procedures (Scsi-Connect Version)

    Chapter 5. Removal and Replacement Disassembly/Reassembly Procedures (SCSI-Connect Version) WARNING Disconnect the power cord before taking the juke- apart prevent possible electrical shock. CAUTION For SCSI-bus jukeboxes: Do not switch off power to the jukebox until you are sure the SCSI bus is inactive. Switching off jukebox when SCSI...

  • Page 96: Service Access

    Medium Optical Disk (RW551/RW552) Library Service Access Right and Left Lower Access Panels: Figure 5–1 Right Lower Access Panel 1. Switch off the power to the jukebox by placing the power standby switch to OFF (0) on the right side.

  • Page 97: Rear Access Panel

    Chapter 5. Removal and Replacement Rear Access Panel: Figure 5–2 Rear Access Panel 1. Remove the seven T-20 screws around the outer edge of the panel. 2. Remove the single screw underneath the bottom of the panel. 3. Rotate the back panel back and lift if off the frame. EK–MOL80–SV.

  • Page 98: Front Left And Front Right Panels

    Medium Optical Disk (RW551/RW552) Library Front Left and Front Right Panels: Figure 5–3 Center Cover Mounting Screw For either or both panels: 1. Remove the four T-20 mounting screws from the panel. Two screws are lo- cated under the bottom front edge of each panel and two screws are located on the rear of each panel.

  • Page 99: Positioning The Control Display Before Removing The Panel

    Chapter 5. Removal and Replacement Figure 5–4 Positioning the Control Display Before Removing the Panel For the front right panel (control panel side) NOTE Before removing the front right panel, the control panel must be positioned correctly to clear the chassis.

  • Page 100: Accessing The Underside Of The Control Panel

    Medium Optical Disk (RW551/RW552) Library Figure 5–5 Accessing the Underside of the Control Panel 3. Remove the T-20 screw that holds the control panel access plate. The right side of the baffle is held by a tab fitting into a slot in the mailslot housing.

  • Page 101: Disconnecting The Control Panel Cable

    Chapter 5. Removal and Replacement Figure 5–6 Disconnecting the Control Panel Cable Figure 5–7 Removing the Front Right Panel EK–MOL80–SV. B01 5–9...
  • Page 102 Medium Optical Disk (RW551/RW552) Library 6. Disconnect the control panel power cable located at the upper left outside corner (rear access). CAUTION In the next step, lift straight up to allow the control panel assembly to clear the jukebox chassis.

  • Page 103: Replacing The Power Supplies

    Chapter 5. Removal and Replacement Replacing the Power Supplies The 24V power supply is nearest the front panel of the jukebox. 1. Remove the rear access panel. Figure 5–8 Power Supplies 2. Remove the power plug from the bottom of the supply. 3.

  • Page 104: Replacing The Mailslot Assembly

    Medium Optical Disk (RW551/RW552) Library Figure 5–9 Power Test Points on the Interposer PCA Replacing the Mailslot Assembly 1. Follow the steps at the beginning of this chapter to remove the right access panel, rear access panel and front right panel.

  • Page 105: Replacing The Control Panel Assembly

    Chapter 5. Removal and Replacement 4. Slide Mailslot out of the alignment slots. Grip the Mailslot firmly be cause the rear end will drop down when clear of rear positioning slots. Replacing the Control Panel Assembly 1. Follow the steps in the service access procedure at the beginning of this chapter to remove the right access panel, rear access panel and front right panel.

  • Page 106: Replacing An Optical Drive

    Medium Optical Disk (RW551/RW552) Library Replacing an Optical Drive 1. Follow the steps in the service access procedure at the beginning of this chapter to remove the right access panel. 2. Disconnect the power and SCSI cables from the rear of all drives.

  • Page 107: Optical Drives–With Cables Disconnected

    Chapter 5. Removal and Replacement Figure 5–13 Optical drives - With Cables Disconnected Figure 5–14 Optical Drive Mounting 5. Slide the drive out along its positioning tabs. EK–MOL80–SV. B01 5–15...

  • Page 108: Replacing The Interposer Pca

    Medium Optical Disk (RW551/RW552) Library Reassembly When replacing the drives, apply pressure sideways to the right at rear of drive. This depresses the rounding straps located inside the frame and allows the drive to seat property. When replacing the RFI panel, first thread the SCSI cable back through the opening.

  • Page 109: Replacing The Picker

    Chapter 5. Removal and Replacement Figure 5–16 Cooling Fans Replacing the Picker 1. Follow the steps in the service access procedure at the beginning of this chapter to remove the right access panel, rear access-panel and front right panel. 2. Unplug the picker umbilical cable. To detach the cable, grab the tab on the end of the cable and pull.

  • Page 110: Picker Translate Cable

    Medium Optical Disk (RW551/RW552) Library 3. Release the translate cable from the (right) side of the translate frame (side nearest front of jukebox). The cable passes through a slotted hole in the side of the frame. Depress the tension spring on the side of the translate frame to release the tension on the cable and allow you to pass the cable up through the slotted hole.

  • Page 111: Picker Translate Cable (Stowed)

    Chapter 5. Removal and Replacement Figure 5–19 Picker Translate Cable (stowed) Figure 5–20 Stopping Vertical Motor Gear Box Motion 5. Remove the T-10 sheet metal screw that holds that holds the capture spring down. 6. Remove the capture spring by pulling up and out. EK–MOL80–SV.

  • Page 112: Picker Capture Bracket Mounting

    Medium Optical Disk (RW551/RW552) Library Figure 5–21 Picker Capture Bracket Mounting 7. Raise the translate frame and picker up to near the top of the jukebox, where you can access its underside. Grip the rear of the frame, pull it up to the desired position, and then insert a screwdriver into the gear box securing hole to prevent the frame from de- scending.

  • Page 113: Removing/Replacing The Translate Frame

    Chapter 5. Removal and Replacement Figure 5-23 Rotating the Picker Assembly Out of the Translate Frame 9. Remove whatever tool is being used in the vertical motor gear box. 10. Lower the translate frame and picker to the bottom of the jukebox. 11.

  • Page 114: Translate Frame Raised For Easier Access

    Medium Optical Disk (RW551/RW552) Library Figure 5–24 Translate Frame Raised For Easier Access 3. Raise the translate frame up to the top of the jukebox and secure with a screwdriver placed in the vertical motor gear box securing hole. 5–22...

  • Page 115: Stopping Vertical Motor Gear Box Motion

    Chapter 5. Removal and Replacement Figure 5–25 Stopping Vertical Motor Gear Box Motion WARNING Take care when handling the encoder strip. Its edges are sharp. 4. Unhook the encoder strip. Pull down on the encoder strip to remove the strip from its retaining peg. Once released, the strip will slide up and out of the plastic guide.

  • Page 116: Encoder Strip Mounting Peg

    Medium Optical Disk (RW551/RW552) Library Figure 5–26 Encoder Strip Mounting Peg 5. Hang the encoder strip out of the way. 6. Remove the "visual locator" bracket on the (front) side of the picker translate frame as follows: Remove the two T-20 screws holding the bracket.

  • Page 117: Picker Translate Frame Tensioners

    Chapter 5. Removal and Replacement Figure 5–27 Picker Translate Frame Tensioners 7. Disconnect the umbilical cable on the underside of the frame. Do this before moving the translate frame down to the bottom of the jukebox in the next step. 8.

  • Page 118: Translate Frame Tensioners Released

    Medium Optical Disk (RW551/RW552) Library Figure 5–29 Translate Frame Tensioners Released 10. Remove the three rope tensioners from the frame as follows: Remove two T-25 long screws per rope tensioner. Start with the rope tensioner at the rear end of the frame.

  • Page 119: Removing/Replacing The Encoder Strip

    Chapter 5. Removal and Replacement Reassembly When replacing the translate frame, be sure that the frame is seated `flat' on three positioning points at the bottom of the main frame, Two points are located in front, left and right in front of the optical drives. One point is located at the rear edge center area where the frame will rest.

  • Page 120: Replacing The Vertical Motion Motor

    Medium Optical Disk (RW551/RW552) Library Figure 5–31 Encoder Strip Mounting Screw Figure 5–32 Top Mount Of Encoder Strip Replacing the Vertical Motion Motor 1. Follow the steps in the service access procedure at the beginning of this chapter to remove the rear access panel.

  • Page 121: Vertical Motion Motor

    Chapter 5. Removal and Replacement 2. Disconnect the two power cables to the vertical motor. Note the orientation of the motor and its cable connections with respect to the gear box (for reassembly). Figure 5–33 Vertical Motion Motor 3. Remove two T-15 motor mounting screws on the gear box. Reassembly: When replacing the motor, use the orienting pegs on the motor to place it cor- rectly on the gear box.

  • Page 122: Replacing The Vertical Motor Gear Box

    Medium Optical Disk (RW551/RW552) Library Replacing the Vertical Motor Gear Box 1. Follow the steps in the service access procedure at the beginning of this chapter to remove the right access panel, rear access panel and front right panel. 2. Follow the steps in "Removing the Picker" and "Removing the Picker /Translate Frame"...

  • Page 123: Pivoting The Tensioner Lever To Release Tension

    Chapter 5. Removal and Replacement Figure 5–35 Pivoting The Tensioner Lever To Release Tension 4. Release the tension on the rear rope tensioner (drive rope). Grip the rope ten- sioner plastic section with one hand and pull back the metal section with your other hand to release the metal securing tab seated in the plastic sec- tion.

  • Page 124: Disconnecting The Drive Rope From A Tensioner

    Medium Optical Disk (RW551/RW552) Library Figure 5–36 Taking The Drive Rope Off the Top Pulleys Figure 5–37 Disconnecting the Drive Rope From a Tensioner 5–32 EK–MOL80–SV. B01...

  • Page 125: Disconnecting The 3-Rope Coupler

    Chapter 5. Removal and Replacement 9. Remove the first two ropes from the rope coupler. The center (second) rope is the drive rope. It is not necessary to remove the rope coupler completely. Figure 5–38 Two Ends of the Slave Rope in the Tensioner Figure 5–39 Disconnecting the 3-Rope Coupler EK–MOL80–SV.

  • Page 126: Rear Side Of Vertical Motor Gear Box

    Medium Optical Disk (RW551/RW552) Library 10. Remove the gear box. Remove one T-25 screw from the base of the gear box. Tip the gear box forward and lift it out. When gear box is removed, note the locating and securing slots on the base of the gear box opposite the screw hole.

  • Page 127: Replacing The Controller Pca

    Chapter 5. Removal and Replacement Reassembly: When replacing the rear rope tensioner be sure that the tensioner `spring' area is positioned in such a way that it is facing you. This will insure that the rope ten- sioner is in the right position to fasten to the translate frame. To give yourself enough rope slack, fasten the drive rope ends to the rope tensioner *before* hanging the drive rope over the top two pulleys.

  • Page 128: Controller Pca–Cover On

    Medium Optical Disk (RW551/RW552) Library Figure 5–43 Controller PCA – Cover On 3. Disconnect the following cables from the controller PCA: SCSI cable, Power cable, Motor encoder and power cables, Picker cable. 4. Remove the seven T-20 screws from the controller PCA and remove the PCA.

  • Page 129: Replacing The Internal Scsi Cable

    Chapter 5. Removal and Replacement Figure 5–45 Controller PCA – Cables Off 5. After replacing the Controller PCA, re-initialize the NVRAM by executing tests “SET DEFAULTS” & “CLEAR ODOMETERS”. Reference section “Re-initializing the Jukebox Controller PCA After Service”. Replacing the Internal SCSI Cable 1.

  • Page 130: Replacing The Scsi Interface Pca

    Medium Optical Disk (RW551/RW552) Library Replacing the SCSI Interface PCA Figure 5–46 Interface/Power Distribution Assembly 1. Follow the steps in the service access procedure at the beginning of this chapter to remove the left side lower access panel. 2. Remove the two T-20 screws holding the interface PCA/power distribution PCA cover.

  • Page 131: Scsi Pca Jumpers

    Chapter 5. Removal and Replacement Figure 5–48 SCSI PCA Jumpers 3. Disconnect the cables to the PCA. 4. Remove the six T-15 screws holding the PCA. EK–MOL80–SV. B01 5–39...

  • Page 132: Re-Initializing The Jukebox Controller Pca Ram After Service

    Medium Optical Disk (RW551/RW552) Library Re-initializing the Jukebox Controller PCA RAM After Service All the RAM on the autochanger controller PCA is kept alive through a charged capacitor, and is, therefore, relatively non-volatile. If this RAM is backed up to flash EEPROM after any changes, the values are held permanently.
  • Page 133 Chapter 5. Removal and Replacement • Clear autochanger logs − clear Soft Error Log − clear Hard Error Log − clear Recovery Error Log) • Reset the password to 0,0,0 Variables set by "Clear Odometers" • Reset the move odometer to zero •...

  • Page 134: Field Replaceable Units (Fru) In The (Medium) Library

    Medium Optical Disk (RW551/RW552) Library Field Replaceable Units (FRU) in the (Medium) Library Table 5–1 is a list of FRU’s in the Large Optical Disk Library. The information includes a cross-reference between Digital and vendor part numbers, a descrip- tion of the unit, the standard cost in US $, the Mean Time Between Failures for the assembly in hours (x 1000), and the repair cost in US $.
  • Page 135 Chapter 5. Removal and Replacement Table 5–1 List of Field Replaceable Units (continued) Digital P/N Vendor P/N Description Uniq R&R Std. MTBF Repair (KHrs.) Cost 29-33424-01 C1170-60059 Cable, Internal 23.10 SCSI 29-33425-01 C1170-60062 Drv. I/O Cable 25.30 29-32817-01 C1160-60065 Cable, Front 8.12 Panel 29-33426-01...

  • Page 136: Recommended Service Kits

    Medium Optical Disk (RW551/RW552) Library Recommended Service Kits The initial recommended service for the optical jukebox includes the exchange parts list and the non-exchange parts list for stocking at a field-level office. NOTE The “x” in the part numbers listed in the following parts tables represents a number from “0”...

  • Page 137: Non-Exchange Parts

    Chapter 5. Removal and Replacement Table 5–3 Non-Exchange Parts (See Figure 5–49) FRU No. Part Number Description Version: SCSI or C1153-60x01 Half-Capacity Autochanger Control- - SCSI ler PCA (4X-drive) C1170-60x04 Interposer PCA (4X-drive) - SCSI C1170-60x08 SCSI Repeater/Converter/LUN PCA - SCSI (4X-drive versions) C1160-60x22 Display Assembly...
  • Page 138 Medium Optical Disk (RW551/RW552) Library Table 5–3 Non-Exchange Parts (continued) FRU No. Part Number Description Version: SCSI or C1160-60x54 Drive Power Cable (2X-drive ver- - SCSI sions) C1170-60x54 Drive Power Cable (4X-drive ver- - SCSI sions) C1160-60x57 Vertical Path-Clear Sensor Cable...

  • Page 139: Jukebox Exploded View

    Chapter 5. Removal and Replacement Figure 5–49 Jukebox Exploded View (1 of 2) EK–MOL80–SV. B01 5–47...
  • Page 140 Medium Optical Disk (RW551/RW552) Library Figure 5–49 Jukebox Exploded View (2 of 2) 5–48 EK–MOL80–SV. B01...

  • Page 141: Jukebox Power Harness

    Chapter 5. Removal and Replacement Figure 5–50 Jukebox Power Harness EK–MOL80–SV. B01 5–49...

  • Page 142: Jukebox Pulley And Rope Diagram

    Medium Optical Disk (RW551/RW552) Library Figure 5–51 Jukebox Pulley and Rope Diagram 5–50 EK–MOL80–SV. B01...

  • Page 143: Miscellaneous

    Chapter 5. Removal and Replacement Miscellaneous While no special tools are required to service the optical jukebox, there are some com- monly used items that may be stocked and available as an area resource. Table 5–4 Common Resource Parts Item HP Part Number 1 m (3.3 ft.) SCSI cable;...

  • Page 144: Theory Of Operation

    Theory of Operation This chapter discusses the following aspects of the robotics of the Medium Optical Disk Library RW551 and RW552 jukeboxes. • Autochanger Command Execution and Mechanics • Autochanger Controller PCA • Interposer PCA • Power Supply • Optical Disk Drive •...

  • Page 145: Autochanger Robotics

    Medium Optical Disk (RW551/RW552) Library Autochanger Robotics Movements The mechanism code of the autochanger accepts high-level SCSI commands from the interface, translates these commands into servo code for the autochanger, executes the command, and reports status. When a SCSI command is received, it is translated into a series of smaller submoves in the servo code of the autochanger and executed.
  • Page 146 Chapter 6. Theory of Operation For example. "Move element 33 to element 2 with flip" is transformed into the following sequence of autochanger functions. 1. Determine that element 33 is a storage slot and element 2 is a drive. 2. Move the picker to the front of the storage element. 3.

  • Page 147: The Autochanger Controller Pca

    Medium Optical Disk (RW551/RW552) Library The Autochanger Controller PCA The autochanger controller PCA contains the following major components: • microprocessor • autochanger ASIC • NCR 53C80 Chip (SCSI bus control) • flash EEPROM • • SCSI interface Figure 6–2 Autochanger Controller PCA Block Diagram The MICROPROCESSOR is a Motorola MC68EC000 running at 12.288 MHz.
  • Page 148 Chapter 6. Theory of Operation The processor interface functions are: decoding the processor's address space, and generating select and strobe signals to give the processor access to the flash EEPROM, RAM, the SCSI controller, internal registers, I/O ports, and optional external registers.

  • Page 149: Interposer Pca

    Medium Optical Disk (RW551/RW552) Library Interposer PCA This PCA provides the drive interface to control the loading and unloading of the optical disk drives from the controller PCA. Drive status is read from here and all ejects are issued from registers on this PCA.

  • Page 150: Power Supplies

    Chapter 6. Theory of Operation Power Supplies There are two power supplies, both autoranging. One supplies +5 volts at 15 amperes and +12 volts at 10 amperes. This supply powers the drives and the autochanger logic. The other supply provides +24 volts at 5 amperes.

  • Page 151: Scsi Repeater/Converter/Lun Pca

    Medium Optical Disk (RW551/RW552) Library The autochanger communicates to the PCA through a GPIO bus. The differential and single-ended connectors are on the top of the PCA and the single-ended bus connection to the jukebox are on the bottom. A slider switch between the two external connectors selects which type of input will be accepted.
  • Page 152 Chapter 6. Theory of Operation The two large components on the PCA are the Field-Programmable Gate Array and the microprocessor. The microprocessor is an 80C52 that has flash- programmable memory on board. (There are no boot ROMs on this PCA). The chip can be programmed, however it must be disconnected from the PCA to do so.

  • Page 153: Picker

    Medium Optical Disk (RW551/RW552) Library In addition to checking the position of the interface select switch on power up, the controller is informed of any change to this switch during normal operation. If the switch position is changed, a BUS RESET signal is sent to the autochanger on the internal SCSI bus.

  • Page 154: Two-Move Exchange

    Chapter 6. Theory of Operation When moving cartridges where the source or destination element is the picker, each thumb must be addressed. One thumb is at element address 16 and the other thumb is at element address 17. The SCSI commands, such as Read Element Status and Mode Sense report back the two element addresses for the transport element.

  • Page 155: Dual-Picker Exchange

    Medium Optical Disk (RW551/RW552) Library Dual-Picker Exchange Using dual-picker mode, true disk exchanges can occur. The picker gets the source cartridge from its home slot, moves it to the drive, EXCHANGES the cartridge with the cartridge in the drive, and then puts the cartridge that was in the drive in its home slot.

  • Page 156: Quick Exchange

    Chapter 6. Theory of Operation Quick Exchange A "quick exchange" is also possible when operating in dual-picker mode. A quick exchange is just an exchange from one thumb of the picker, to the drive, and then to the other thumb of the picker. To do a quick exchange, the driver in the host has to be smart enough to see an "exchange sequence"...

  • Page 157: Controller Pca

    Medium Optical Disk (RW551/RW552) Library The Multifunction Optical Drive and Drive Controller Figure 6–6 Functional Diagram There are four major sub-assemblies within the optical drive: the controller PCA, servo PCA, loader mechanism, and the optical head. Controller PCA The controller PCA is a microprocessor-based collection of digital electronics that handles functions performed by a SCSI controller, a data buffer, and a formatter/sequencer.

  • Page 158: Servo Pca

    Chapter 6. Theory of Operation Data Buffer The data buffer and associated control electronics provide a buffer to speed match transfers to and from the host computer and the optical disk. The data buffer provides a cache for read and write operations, optimizing the speed of these transfers.

  • Page 159: Read And Write Channel Electronics

    Medium Optical Disk (RW551/RW552) Library Also on the servo PCA are control electronics for the loader assembly. Included are drivers for the loader and spindle (speed control) motors, sensor circuitry for the cartridge loaded and write protect detectors, LED drivers for the control panel LEDs, and control circuitry for the bias magnet subassembly of the loader mechanism.

  • Page 160: Optical Disk Layout And Error Correction

    Chapter 6. Theory of Operation Figure 6–7 4X-Drive Functional Diagram Optical Disk Layout and Error Correction Disk Formats Two optical disk formats are available. The RWZ53 optical drive can read from and write to both 650-Mbyte and 2.6-GByte optical disks. The target's role is to manage the 130 mm multifunctional drive and disk as an optical memory device through its SCSI interface.

  • Page 161: Controller

    Medium Optical Disk (RW551/RW552) Library The following sections outline disk layout for the 650-Mbyte and 1.3-GByte optical disks. Throughout this section, the sector number is that of a 1,024 bytes/sector disk. The value of a 512 bytes/sector disk is written inside parentheses just after the value for the 1,024 bytes/sector disk.

  • Page 162: Theory Of Operation ( Continued Dsp (Digital Signal Processor)

    Chapter 6. Theory of Operation Read/Write Channel Electronics Read/write channel electronics take analog data from the optical head and convert it into digital “transitions”. These transitions are decoded by the encoder/decoder electronics in the controller chip to extract data from format and error correction features.

  • Page 163: Optical Disk Layout And Error Correction

    Medium Optical Disk (RW551/RW552) Library Optical Disk Layout and Error Correction Disk Formats The RWZ52 optical drive can read from and write to both 650-Mbyte (1X) and 1.3 Gbyte optical disks. The RWZ53 (4X) can read and write to both the 1.3 Gbyte and 2.6 Gbyte disks;...

  • Page 164: User Zone Layout

    Chapter 6. Theory of Operation User Zone Layout The User Zone consists of Defect Management Areas (DMAs), a User Area and a Slipping Area. The DMAs contain information on the organization of the User Area into User Groups and Spare Groups. The DMAs also contain a Primary Defect List (PDL) and a Secondary Defect List (SDL) that provide information on the locations of defects.

  • Page 165: 2.6-Gbyte Disk User And Spare Groups

    Medium Optical Disk (RW551/RW552) Library 2.6-Gbyte Disk User and Spare Groups There are 34 User/Spare groups for 1,024 bytes/sector media and 30 groups for 512 bytes/sector media. The 2.6-Gbyte media establishes groups BEFORE accounting for slip spares. (Refer to the following section, “Drive Defect Management”...

  • Page 166: User Zone Layout For 1.3–Gbyte Media, G=1

    Chapter 6. Theory of Operation Figure 6–10 User Zone Layout for 1.3-Gbyte Media, g=1 EK–MOL80–SV. B01 6–23...

  • Page 167: User Zone Layout For 1.3–Gbyte, G=16

    Medium Optical Disk (RW551/RW552) Library Figure 6–11 User Zone Layout for 1.3-Gbyte, g=16 6–24 EK–MOL80–SV. B01...

  • Page 168: User Zone Layout For 2.6-Gbyte Media, 1,024 Bytes/Sector

    Chapter 6. Theory of Operation Figure 6–12 User Zone Layout for 2.6-Gbyte Media, 1,024 bytes/sector EK–MOL80–SV. B01 6–25...
  • Page 169 Medium Optical Disk (RW551/RW552) Library Figure 6–13 User Zone Layout for 2.3-Gbyte Media, 512 bytes/sector 6–26 EK–MOL80–SV. B01...

  • Page 170: Values For N And M For 1.3 Gbyte With G=16 (1,024 Media)

    Chapter 6. Theory of Operation Table 6–1 Values for n and m for 1.3 Gbyte with g=16 (1,024 media) Band Data Band 0 27064 Data Band 1 28815 Data Band 2 30498 Data Band 3 32198 Data Band 4 33898 Data Band 5 35581 Data Band 6...

  • Page 171: Physical Revolution To Logical Track Layout

    Medium Optical Disk (RW551/RW552) Library Table 6–2 Physical Revolution to Logical Track Layout Zone or Band Physical Revolution Logical Track Range Range Inner SFP (-369, -161) (-369, -161) Inner Mfg. (-128, -33) (-128, -33) Data Band 0 (0, 1349) (0, 1599)

  • Page 172: X, 1,024 Bytes/Sector Disk Structure

    Chapter 6. Theory of Operation Table 6–3 4X 1,024 Bytes/Sector Disk Structure Zone Start Start Track Track Track LBAs 2948 2944 50048 50047 2974 5873 2900 49300 50048 99347 5899 8753 2855 48535 99348 147882 8779 11588 2810 47770 147883 195652 11614 14378...

  • Page 173: X, 512 Bytes/Sector Disk Structure

    Medium Optical Disk (RW551/RW552) Library Table 6–3 4X 1,024 Bytes/Sector Disk Structure (continued) Zone Start Start Track Track Track LBAs 69529 71123 1595 27115 1169158 1196272 71149 72698 1550 26350 1196273 1222622 72724 74228 1505 25585 1222623 1248207 74254 75712...
  • Page 174 Chapter 6. Theory of Operation Table 6–4 4X 512 Bytes/Sector Disk Structure (continued) Zone Start Start Track Track Track LBAs 56452 58501 2050 63550 1735535 1799084 58524 60517 1994 61814 1799085 1860898 60540 62477 1938 60078 1860899 1920976 62500 64381 1882 58342 1920977...

  • Page 175: Technical Comparisons Of 1X, 2X, And 4X Optical Drives

    Medium Optical Disk (RW551/RW552) Library Table 6–5 Technical Comparisons of 1X, 2X, and 4X Optical Drives Item bytes per sector 1,024 (512) 1,024 (512) 1,024 (512) track pitch 1.60 1.39 1.15 spiral direction outward outward inward data encoding (2, 7) RLL...

  • Page 176: Drive Defect Management

    Chapter 6. Theory of Operation Drive Defect Management The RWZ53 drive supports the defect management scheme specified by ISO 10089A and ISO DIS 11560, and ECMA 184. Each DMA consists of a : • disk definition structure (DDS) • primary defect list (PDL) •...

  • Page 177: Slip Sparing Algorithm

    Medium Optical Disk (RW551/RW552) Library The Slipping Area is a portion of the User Zone used by the slip sparing algorithm. Defects found during certification are excluded from use. The user accessible space is slipped by a corresponding number of sectors into the slip area.

  • Page 178: Replacement Sparing Algorithm

    Chapter 6. Theory of Operation Replacement Sparing Algorithm The replacement sparing algorithm is intended to manage defective sectors found after initialization. As was mentioned earlier, the DDS allows for a number of sectors to be reserved for future use by the replacement sparing algorithm. These "spare sectors" reside in the Spare Groups, and are referred to via entries in the SDL.

  • Page 179: Diagnostic Strategy

    Medium Optical Disk (RW551/RW552) Library Table 6–6 shows the error thresholds for the RWZ52 optical drive. The sector IDs column refers to the minimum number of sector IDs that must be read cor- rectly for the corresponding operation to be deemed successful. The ECC level column refers to the maximum number of bytes per interleave that require correction in order for the corresponding operation to be deemed successful.

  • Page 180: Single-Ended And Differential Scsi Interfaces

    Chapter 6. Theory of Operation Finally, SCSI is capable of high data transfer rates. Synchronous data transfer rates may be as fast as 4 Mbytes/second, and asynchronous rates up to 1.5 Mbytes/second, limited only by the capabilities of the computer and peripheral. CAUTION CYCLE POWER...

  • Page 181: Scsi Command Set

    Medium Optical Disk (RW551/RW552) Library SCSI Command Set NOTE Detailed descriptions SCSI-2 commands and their functionality with optical products can be found in the following documents: Offline Diagnostics Hewlett-Packard Optical Products, reference appendix section of this manual. American National Standards Institute (ANSI)

  • Page 182: Basic Supplies & Reorderable Parts

    Basic Supplies and Re-orderable Parts Commonly used items that may be stocked and available as an area resource. Basic Supplies & Re-orderable Parts While no special tools are required to service the optical jukebox, there are some commonly used items that may be stocked and available as an area re- source.

  • Page 183: Related Documents

    Medium Optical Disk (RW551/RW552) Library Table A–1 Common Resource Parts (continued) Item Digital Part Number Write-Once optical disk (594 Mbytes, 512 bytes/sector) Single disk RWX6K-02 Pack of 5 disks DL-RWX6K-BA Rewritable optical disk (1.2 GBytes, 512 bytes/sector) RWX5K-01 Write-Once optical disk (1.2 GBytes, 512 bytes/sector) RWX5K-02 These parts are not stocked by Digital.

  • Page 184: Tima Documents

    Appendix A. Basic Supplies and Re-orderable Parts Table A–3 Tima Documents Product Service Plans Entry Number Keyword(s) RW525 TA-0618 RW5xx, optical, store RW531 TA-0651 RW5xx, optical, store RW532 TA-0650 RW5xx, optical, store Optical Jukebox Series 7174 RW5xx, Jukebox, store Optical Storage Management 3731 OSMS Optical Desktop Description...

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