Digital Equipment StorageWorks RW555 User manual

Large Optical Disk
(RW555/RW557) Library
Service Manual
EK–RW55L–SM. B01
Digital Equipment Corporation
Maynard, Massachusetts

Second Edition, November 1997
This document contains information that is protected by copyright. All rights are
reserved. No part of this document may be photocopied, reproduced, or translated to
another language without the prior written consent of the seller. The information
contained in this document is subject to change without notice.
The seller makes no warranty of any kind with regard to this printed material,
including, but not limited to, the implied warranties of merchantability and fitness for a
particular purpose. The seller shall not be liable for errors contained herein or for
incidental or consequential damages in connection with the furnishing, performance, or
use of this material.
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the
following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
The DIGITAL Logo is a trademark of the DIGITAL Equipment Corporation.
Copyright © DIGITAL Equipment Corporation 1997 All Rights Reserved
Printed in U. S. A.

EK–RW55L–SM. B01 iii
Contents
Revision Record...............................................................................................xi
About This Guide......................................................................................... xiii
1 Product Information
1.1 Product Matrix ....................................................................................1–1
1.2 Product Support...................................................................................1–2
1.3 Characteristics.....................................................................................1–2
2 Environmental/Installation/PM
2.1 Environmental Requirements...............................................................2–1
2.2 Primary Power/External Ground..........................................................2–1
2.3 Current Requirements..........................................................................2–1
2.4 Clearance Requirements......................................................................2–2
2.5 Weight-Bearing Requirements.............................................................2–2
2.6 Location Requirements........................................................................2–2
2.7 Responsibilities ...................................................................................2–3
2.8 Checkout Procedure.............................................................................2–3
2.9 Unpacking and Taking the Jukebox Off the Pallet ...............................2–3
2.10 Moving the Jukebox a Short Distance..................................................2–6
2.11 Shipping the Jukebox...........................................................................2–7
3 Product Configuration and Operation
3.1 Connections to the Jukebox.................................................................3–1
3.2 Configuring and Operating the Jukebox...............................................3–3
3.2.1 Connecting an Uninterruptable Power Supply (UPS)........................3–3
3.2.2 Connecting the SCSI Cables to the 4X-Drive Jukebox .....................3–4
3.2.3 Connecting the Jukebox as the Only Peripheral................................3–5
3.2.4 Removing the Customer Access Panel .............................................3–5
3.2.5 Connecting a 4- or 6-Box Jukebox as the Only Peripheral................3–6
3.2.6 Connecting the Jukebox with Other SCSI Peripherals ......................3–7
3.2.7 Removing the Customer Access Panel .............................................3–8
3.2.8 Connecting 4 or 6-Drive Jukeboxes with Other Peripheral Devices..3–9

Large Optical Disk (RW555/RW557) Library
iv EK–RW55L–SM. B01
3 Product Configuration and Operation (continued)
3.2.9 Connecting Peripheral Devices with Bus 1 ....................................3–10
3.2.10 Setting the SCSI IDs...................................................................... 3–13
3.2.11 Setting the LUN Mode...................................................................3–15
3.3 Control Panel Operation....................................................................3–19
3.3.1 Using Selection Buttons.................................................................... 3–20
3.3.2 Understanding Display Window Messages........................................3–21
3.3.3 Setting the SCSI IDs .........................................................................3–23
3.3.4 Setting the LUN Mapping Active Mode............................................ 3–24
3.3.5 Viewing the Current SCSI Address Settings......................................3–26
3.3.6 Changing the Current SCSI Address Settings ....................................3–27
3.3.7 Setting a Configuration Option.......................................................... 3–28
3.4 Loading an Optical Disk into the Jukebox......................................... 3–32
3.5 Ejecting an Optical Disk from the Jukebox .......................................3–34
3.6 Entering the Administration Menu Password to Enter ADMIN..........3–36
3.7 Changing the Administration Menu Password...................................3–37
4 Troubleshooting and Diagnostics
4.1 Understanding the Troubleshooting Process........................................4–1
4.1.1 Obtaining Troubleshooting Information ..............................................4–1
4.2 How “Possible Causes” Should be Evaluated......................................4–2
4.3 Reading Logs From the Control Panel.................................................4–3
4.4 Getting Error Information through the SCSI Bus.................................4–7
4.5 Diagnostic...........................................................................................4–7
4.6 Operation/Installation Error Information.............................................4–8
4.7 Recovery from Hardware Errors........................................................ 4–15
4.8 Running an Internal Test...................................................................4–33
4.9 Setting Write Verify.......................................................................... 4–37
4.10 Optical Disk Cleaning.......................................................................4–37
4.10.1 Cleaning Tools Available..................................................................4–38
4.11 Using the Eject Tool to Remove a Disk from the RWZ53 Drive .......4–39

Contents
EK–RW55L–SM. B01 v
5 Removal and Replacement
5.1 Field-Replaceable Assemblies.............................................................5–2
5.2 ESD Precautions..................................................................................5–2
5.3 Tools Required....................................................................................5–3
5.4 Disassembly/Reassembly Procedure....................................................5–3
5.5 Replacing an Optical Drive .................................................................5–6
5.6 Replacing the Power Supplies............................................................5–11
5.7 Replacing the Mailslot Assembly ......................................................5–13
5.8 Replacing the Control Panel Assembly..............................................5–15
5.9 Replacing the Interposer PCAs..........................................................5–17
5.10 Replacing the Picker..........................................................................5–18
5.11 Removing/Replacing the Translate Frame.........................................5–24
5.12 Removing/Replacing the Vertical Encoder Strip................................5–29
5.13 Replacing the Vertical Motion Motor................................................5–31
5.14 Replacing the Vertical Motor Gear Box.............................................5–32
5.15 Replacing the Controller PCA ...........................................................5–38
5.16 Replacing the Power Distribution PCA..............................................5–39
5.17 Replacing the SCSI Interface/LUN Converter PCA...........................5–40
5.18 Replacing the Vertical-Path-Clear PCA.............................................5–42
5.19 Re-initializing the Jukebox Controller PCA RAM After Service........5–43
5.19.1 Variables Set by “Set Defaults”.........................................................5–44
5.19.2 Variables Set by “Clear Odometers”..................................................5–44
5.20 Field Replaceable Units in the Library ..............................................5–45
5.21 Recommended Service Kits...............................................................5–48
5.22 Miscellaneous....................................................................................5–58
6 Theory of Operation
6.1 Autochanger Robotics .........................................................................6–1
6.1.1 Movements..........................................................................................6–1
6.2 The Autochanger Controller PCA........................................................6–3
6.3 Interposer PCAs ..................................................................................6–5
6.4 Power Supplies..................................................................................6–10
6.5 SCSI Repeater/LUN Converter PCA .................................................6–10
6.5.1 Component Description.....................................................................6–11
6.5.2 Logical Unit Number Mapping Capability.........................................6–13
6.6 Single-Picker Mode...........................................................................6–18
6.6.1 Disk Exchanges in Single-Picker Mode.............................................6–18
6.7 Element Numbering ..........................................................................6–19
6.8 Disk Storage Slot Numbering Sequence.............................................6–19

Large Optical Disk (RW555/RW557) Library
vi EK–RW55L–SM. B01
6 Theory of Operation (continued)
6.8.1 Limited Access Slots.........................................................................6–24
6.9 4X Multi-function Optical Drives...................................................... 6–27
6.9.1 Controller PCA................................................................................. 6–28
6.9.2 SCSI Controller................................................................................. 6–28
6.9.3 Data Buffer.......................................................................................6–28
6.9.4 Formatter/Sequencer.........................................................................6–28
6.9.5 Servo PCA........................................................................................6–28
6.9.6 DSP Microprocessor and Support/Servo Control Loops.....................6–28
6.9.7 Read and Write Channel Electronics................................................. 6–29
6.10 Mechanism Assembly.......................................................................6–29
6.10.1 Loader Mechanism............................................................................ 6–29
6.10.2 Optical Head.....................................................................................6–29
6.10.3 4X Drive Mechanism........................................................................6–30
6.10.4 Controller..........................................................................................6–30
6.10.5 CPU..................................................................................................6–31
6.10.6 Gate Array........................................................................................6–31
6.10.7 DSP (Digital Signal Processor).......................................................... 6–31
6.10.8 Read/Write Channel Electronics .......................................................6–31
6.10.9 Loading Motor.................................................................................. 6–31
6.10.10 Bias Magnet...................................................................................... 6–31
6.10.11 Optical Head..................................................................................... 6–31
6.11 Optical Disk Layout and Error Correction......................................... 6–32
6.11.1 Disk Formats.....................................................................................6–32
6.11.2 Optical Disk Layout..........................................................................6–32
6.11.3 User Zone Layout .............................................................................6–33
6.12 Drive Defect Management ................................................................6–44
6.12.1 Slip Sparing Algorithm ..................................................................... 6–45
6.12.2 Replacement Sparing Algorithm ....................................................... 6–46
6.12.3 Error Thresholds ...............................................................................6–46
6.13 The SCSI Interface............................................................................ 6–47
6.13.1 Single-Ended and Differential SCSI Interface ................................... 6–48

Contents
EK–RW55L–SM. B01 vii
Figures
2–1 Clearance Requirements......................................................................2–2
3–1 Right Side Panel Features (4X version) ...............................................3–1
3–2 Jukebox Display Menu Tree................................................................3–5
3–3 Loading an Optical Disk......................................................................3–6
2–1 Clearance Requirements......................................................................2–2
3–1 Right Side Panel Features....................................................................3–1
3–2 Connecting a 4 or 6-Drive Jukebox as the Only Peripheral ..................3–6
3–3 Connecting a 4 or 6-Drive Jukeboxes with Other Peripheral Devices.3–10
3–4 Connecting Peripheral Devices with Bus 1 ........................................3–11
3–5 Connecting Peripheral Devices with Bus 1 ........................................3–13
3–6 The Jukebox Control Panel and Mailslot ...........................................3–19
3–7 Jukebox Display Menu Tree – 4X Drives ..........................................3–22
3–8 Loading an Optical Disk....................................................................3–32
4–1 The Autochanger Returns Suspect FRUs .............................................4–2
4–2 Evaluating Suspect FRUs ....................................................................4–3
4–3 Information and Tests Through the SCSI Bus......................................4–7
5–1 Access Panels......................................................................................5–4
5–2 Online Drive Replacement Procedure..................................................5–7
5–3 Power Supplies..................................................................................5–12
5–4 Mounting Screws (24/42 Power Supply)............................................5–13
5–5 Mailslot Connector on Upper Interposer PCA....................................5–14
5–6 Mailslot Assembly Mounting Screws.................................................5–15
5–7 Rear of Control Panel Assembly........................................................5–16
5–8 Upper Interposer PCA .......................................................................5–17
5–9 Lower Interposer PCA.......................................................................5–18
5–10 Picker Umbilical Cable......................................................................5–19
5–11 Picker Translate Cable.......................................................................5–20
5–12 Picker Translate Cable (stowed) ........................................................5–21
5–13 Stopping Vertical Motor Gear Box Motion........................................5–21
5–14 Picker Capture Bracket Mounting......................................................5–22
5–15 Picker Capture Bracket......................................................................5–23
5–16 Rotating the Picker Assembly Out of the Translate Frame.................5–23
5–17 Translate Frame Raised for Easier Access .........................................5–24
5–18 Stopping Vertical Motor Gear Box Motion........................................5–25
5–19 Vertical Encoder Strip Mounting Peg ................................................5–26
5–20 Removing the Visual Locator Bracket...............................................5–27
5–21 Picker Translate Frame Tensioners....................................................5–27

Large Optical Disk (RW555/RW557) Library
viii EK–RW55L–SM. B01
Figures (continued)
5–22 Translate Frame Tensioner Mount.....................................................5–28
5–23 Translate Frame Tensioner Released.................................................5–28
5–24 Retaining Peg on Lower End of the Vertical Encoder Strip...............5–30
5–25 Upper Encoder Strip Mount ..............................................................5–30
5–26 Vertical Motion Motor......................................................................5–31
5–27 Slave Rope Tensioner Assembly.......................................................5–32
5–28 Pivoting the Tensioner Lever to Release Tension..............................5–33
5–29 Taking the Drive Rope Off the Top...................................................5–33
5–30 Disconnecting the Drive Rope from a Tensioner...............................5–34
5–31 Two Ends of the Slave Rope Tensioner............................................. 5–34
5–32 Disconnecting the 3-Rope Coupler.................................................... 5–35
5–33 Rear Side of Vertical Motor Gear Box ..............................................5–36
5–34 The Rope and Pulley System.............................................................5–36
5–35 Positioning the Tensioner to Mount on Translate Frame....................5–37
5–36 Controller PCA .................................................................................5–38
5–37 Power Distribution PCA....................................................................5–39
5–38 SCSI Repeater/LUN Converter Enclosure.........................................5–40
5–39 SCSI Repeater/LUN Converter PCA.................................................5–41
5–40 SCSI Repeater/LUN Converter PCA Jumpers ................................... 5–41
5–41 Vertical Path Clear............................................................................5–42
5–42 Vertical Path Clear PCA Mounting Screws .......................................5–43
5–43 Jukebox Exploded View....................................................................5–51
5–44 Jukebox Pulley and Rope Diagram....................................................5–57
6–1 SCSI Command Translation for Autochanger Operation .....................6–1
6–2 Autochanger Controller PCA ..............................................................6–3
6–3 Upper Interposer PCA.........................................................................6–5
6–4 Lower Interposer PCA.........................................................................6–6
6–5 Drive Numbering ................................................................................6–8
6–6 Power Supplies and Power-on Sequence ........................................... 6–10
6–7 SCSI Repeater/LUN Converter PCA.................................................6–11
6–8 SCSI Repeater/LUN Converter Passthrough Mode (6 drive).............. 6–14
6–9 SCSI Repeater/LUN Converter Mapping Active Mode (6 drive).......6–16
6–10 Element and Slot Numbers................................................................6–19
6–11 Slot and Element Numbering Sequence (1 of 3)................................6–20
6–12 Slot and Element Numbering Sequence (2 of 3) ................................6–21
6–13 Slot and Element Numbering Sequence (3 of 3) ................................6–22
6–14 Slot Numbering Decal.......................................................................6–23
6–15 Limited Access Slots at the Bottom of the Stacks..............................6–24
6–16 Limited Access Slots at the Top of the Stacks...................................6–25

Contents
EK–RW55L–SM. B01 ix
Figures (continued)
6–17 One-Finger Grab Recovery Areas at the Bottom of the Stacks...........6–26
6–18 One-Finger Grab Recovery Areas at the Top of the Stacks ................6–26
6–19 4X-Drive Functional Diagram...........................................................6–27
6–20 4X-Drive Functional Diagram...........................................................6–30
6–21 Optical Disk Layout ..........................................................................6–33
6–22 User Zone Layout for 650-Byte Media ..............................................6–35
6–23 User Zone Layout for 1.3-GByte Media, g=1 ....................................6–36
6–24 User Zone Layout for 1.3-GByte Media, g=16...................................6–37
6–25 User Zone Layout for 2.3-GByte Media, 512 Bytes/Sector................6–40
Tables
1–1 4X-Drive Jukeboxes ............................................................................1–1
1–2 Jukebox Capacities by 7 Disk Density and Number of Slots ................1–1
1–3 Optical Disk Standards Met by Digital Optical Disks ..........................1–2
1–4 Optical Disk Drive Mechanism and Jukebox .......................................1–2
1–5 Environmental Specifications..............................................................1–4
1–6 Power Requirements............................................................................1–6
1–7 Service Characteristics ........................................................................1–6
1–8 Product Certifications..........................................................................1–6
1–9 Digital Optical Drives..........................................................................1–7
3–1 UPS Power Requirements....................................................................3–3
3–2 SCSI Cable Length Limitations...........................................................3–4
3–3 SCSI Configuration Choices................................................................3–8
3–4 Default SCSI and LUN Settings.........................................................3–14
3–5 Default LUN Settings........................................................................3–16
3–6 LUN Mapping If “DRVs BUS 1” SCSI Addresses Changed ..............3–17
3–7 Default SCSI and LUN Settings.........................................................3–23
3–8 Default LUN Settings........................................................................3–25
3–9 Default SCSI and LUN Settings.........................................................3–27
3–10 Configuration Choices.......................................................................3–30
4–1 Information Logs.................................................................................4–4
4–2 Operation Errors..................................................................................4–8
4–3 Hardware Errors and Recovery Procedures........................................4–15
4–4 Micro-Move Error Codes...................................................................4–22
4–5 Micro-Move ID .................................................................................4–25
4–6 Tests Available from the Control Panel .............................................4–34
5–1 List of Field Replaceable Units..........................................................5–45
5–2 Exchange Parts..................................................................................5–48

Large Optical Disk (RW555/RW557) Library
x EK–RW55L–SM. B01
Tables (continued)
5–3 Non-Exchange Parts.......................................................................... 5–49
5–4 Common Resource Parts ...................................................................5–58
6–1 Passthru Mode – Six Drives ..............................................................6–14
6–2 LUN Mapping Active – Six Drives ...................................................6–15
6–3 Default SCSI and LUN Settings........................................................6–17
6–4 Element Numbering in the Jukebox................................................... 6–19
6–5 Values for n and m for 1.3 Gbyte with g=1 6 (1024 media)...............6–38
6–6 Physical Revolution to Logical Track Layout....................................6–39
6–7 4X 1024 Bytes/Sector Disk Structure ................................................ 6–41
6–8 4X 512 Bytes/Sector Disk Structure.................................................. 6–42
6–9 Technical Comparison of 1X, 2X, and 4X Optical Drives ................. 6–43
6–10 Error Thresholds\x11.........................................................................6–47
Reader’s Comment Form........................................................Inside Back Cover