Digital Equipment StorageWorks RW546 User manual

Small Optical Disk Library
(RW546)
Service Manual
EK–SOL46–SV. B01
Digital Equipment Corporation
Maynard, Massachusetts

Second Edition, October 1997
The information in this document is subject to change without notice and should
not be construed as a commitment by DIGITAL Equipment Corporation.
DIGITAL Equipment Corporation assumes no responsibility for any errors that
might appear in this document.
The software described in this document is furnished under a license and may be
used or copied only in accordance with the terms of such license. No
responsibility is assumed for the use or reliability of software or equipment that
is not supplied by DIGITAL Equipment Corporation or its affiliated companies.
Reproduced with permission of the Hewlett-Packard Company
The following are trademarks of DIGITAL Equipment Corporation: the Digital
logo and StorageWorks.
1997 DIGITAL Equipment Corporation. All rights reserved.
Printed in USA

EK–SOL46–SV. B01 iii
Contents
1 Product Information
Product Features ............................................................................................................. 1–2
Interface Configurations (RW545/RW546)...................................................................... 1–2
SCSI Interface Options ........................................................................................... 1–3
Single-ended SCSI Interface.................................................................................... 1–3
Differential SCSI Interface ...................................................................................... 1–3
The Optical Drive Mechanism ........................................................................................ 1–3
Magneto–Optical Disks .................................................................................................. 1–4
Product Support .............................................................................................................. 1–5
Product Matrix ............................................................................................................... 1–5
Characteristics ................................................................................................................ 1–5
2 Environmental/Installation/PM
Environmental Requirements ......................................................................................... 2–1
Primary Power/External Ground ..................................................................................... 2–1
Clearance Requirements ................................................................................................. 2–1
Location Requirements ................................................................................................... 2–1
Responsibilities .............................................................................................................. 2–2
Checkout Procedure ....................................................................................................... 2–2
Preventive Maintenance ................................................................................................. 2–3
Cleaning Optical Disks............................................................................................ 2–3
Cleaning Tools Available......................................................................................... 2–4
3 Product Configuration and Operation
Configuring and Operating the RW546 Jukebox.............................................................. 3–1
Assembly and Configuration ................................................................................... 3–1
Jukebox Components....................................................................................................... 3–2
Removing the Shipping Screw......................................................................................... 3–4
Rear Panel Features and Controls.................................................................................... 3–5
Connecting an Uninterruptable Power Supply.................................................................. 3–6
Connecting the SCSI Cables............................................................................................ 3–7
Connecting Power ........................................................................................................... 3–8
Front Panel/Control Panel Operations.............................................................................. 3–9
Host Configuration........................................................................................................ 3–10

Small Optical Disk Library RW546 Service Manual
iv EK–SOL46–SV. B01
3 Product Configuration and Operation (continued)
Autochanger Configuration Choices.............................................................................. 3–10
Setting a Configuration (“CONF”) ................................................................................ 3–14
Displaying Information Logs......................................................................................... 3–14
Choosing Tests and Displaying Results (“TEST”) ......................................................... 3–14
Setting the SCSI Address .............................................................................................. 3–16
Securing the Jukebox..................................................................................................... 3–17
Setting a New Security Code......................................................................................... 3–17
Restricting Disk Insertion and Removal ........................................................................ 3–18
Setting CONF 15 or CONF 20....................................................................................... 3–18
Controlling Mailslot Rotation........................................................................................ 3–19
Moving or Shipping the RW546 Jukebox ..................................................................... 3–20
Moving the Jukebox a Short Distance.................................................................... 3–20
Shipping the Jukebox............................................................................................. 3–21
4 Troubleshooting and Diagnostics
Operation / Installation Troubleshooting – RW546 Jukebox............................................ 4–1
Operation/Installation Error Information ................................................................. 4–1
Accessing and Running Internal Diagnostic Tests.................................................... 4–7
Operation /Installation Troubleshooting................................................................... 4–8
Error and Performance Logs............................................................................................ 4–9
The Find Home Sequence and Information Logs........................................................... 4–11
Specific Steps of the FIND HOME Sequence......................................................... 4–11
Power–on Selftest.......................................................................................................... 4–21
Optical Disk Cleaning – All Jukeboxes.......................................................................... 4–22
Cleaning Tools Available....................................................................................... 4–23
Using the Eject Tool to Remove a Disk From the RWZ53 Drive ........................... 4–23
Troubleshooting Using the Control Panel and Observation ........................................... 4–24
The Autochanger Lists the First "Possibles" .......................................................... 4–25
How to Use the Results of the Internal Tests ......................................................... 4–27
The FRU Isolation Test Sequence ......................................................................... 4–28
Error and Performance Logs ................................................................................. 4–29
Verification/Recovery from Hardware Errors ............................................................... 4–30
Getting Error Information through the SCSI Bus .......................................................... 4–43
Diagnostics .................................................................................................................. 4–44
Internal Diagnostics Tests ............................................................................................. 4–45

Contents
EK–SOL46–SV. B01 v
5 Removal and Replacement
Field–Replaceable Assemblies ....................................................................................... 5–2
ESD Precautions ..................................................................................................... 5–3
Tools Required ....................................................................................................... 5–3
Assembly/Disassembly Procedures.................................................................................. 5–3
Service Access ............................................................................................................... 5–4
Replacing the Autochanger Controller PCA ............................................................ 5–6
Replacing Assemblies in the Front Bezel ................................................................ 5–8
Replacing the Fan ................................................................................................. 5–10
Replacing the Display ........................................................................................... 5–11
Replacing the Mailslot Assembly........................................................................... 5–12
Replacing the Optical Drive Mechanism ............................................................... 5–14
Manually Removing Disks from Drives ................................................................ 5–18
Removing a Disk from the RWZ53 Drive.............................................................. 5–19
Replacing the Picker/Carriage Assembly ............................................................... 5–20
Replacing the Leadscrew Assembly ...................................................................... 5–22
Replacing the Power Supply ................................................................................. 5–27
Replacing the Magazine Guides ............................................................................ 5–28
Replacing the SCSI Cable ..................................................................................... 5–29
Replacing the Differential PCA (Differential Versions Only) ................................ 5–29
Re–initializing the Autochanger Controller PCA RAM after Service ............................ 5–29
Variables Set by Configuration 16 ......................................................................... 5–29
Variables Set by Configuration 18 ......................................................................... 5–31
Field Replaceable Units ................................................................................................ 5–36
Recommended Service Kits........................................................................................... 5–37
Miscellaneous ............................................................................................................... 5–38
6 Theory of Operation
The Autochanger ............................................................................................................ 6–1
Movements.............................................................................................................. 6–1
Mechanics ............................................................................................................... 6–3
The Autochanger Controller PCA ................................................................................... 6–4
The Power Supply .......................................................................................................... 6–6
The Multifunction Optical Drive and Drive Controller ................................................... 6–7
Controller PCA........................................................................................................ 6–8
Servo PCA............................................................................................................... 6–8
Mechanism Assembly.............................................................................................. 6–9
4X Drive Mechanism............................................................................................. 6–10
Optical Disk Layout and Error Correction .................................................................... 6–13
Disk Formats......................................................................................................... 6–13
Optical Disk Layout............................................................................................... 6–13
User Zone Layout.................................................................................................. 6–14
Optical Disk Layout - 1.3 Gbyte Capacity.............................................................. 6–16
User Zone Layout - 1.3 Gbyte Capacity................................................................. 6–17

Small Optical Disk Library RW546 Service Manual
vi EK–SOL46–SV. B01
6 Theory of Operation (continued)
Drive Defect Management ............................................................................................ 6–28
Slip Sparing Algorithm.......................................................................................... 6–29
Replacement Sparing Algorithm............................................................................ 6–30
Error Thresholds.................................................................................................... 6–30
Error Detection and Recovery ....................................................................................... 6–31
Error Detection...................................................................................................... 6–32
Error Detection Processes...................................................................................... 6–33
SCSI Detected Errors............................................................................................. 6–33
Move Errors........................................................................................................... 6–34
Hardware Error Codes................................................................................................... 6–35
Real Time Event Logging...................................................................................... 6–35
Diagnostic Stragety................................................................................................ 6–36
The SCSI Interface ....................................................................................................... 6–36
Single–Ended versus Differential SCSI Interfaces.................................................. 6–37
SCSI Command Set .............................................................................................. 6–37
Reader Comments
Figures
1–1 The 16–Slot Optical Disk Jukebox – RW546.................................................... 1–1
3–1 Jukebox Major Components ............................................................................ 3–2
3–2 Shipping Screw Location ................................................................................. 3–4
3–3 Rear Panel - RW546 ........................................................................................ 3–5
3–4 Front Panel....................................................................................................... 3–9
3–5 Replacing the Shipping Screw........................................................................ 3–22
4–1 Information and Tests Through the Control Panel........................................... 4–25
4–2 The Autochanger Returns Suspect FRUs ....................................................... 4–25
4–3 How Service Views the Suspect FRUs ........................................................... 4–27
4–4 Information and Tests Through the SCSI Bus ................................................ 4–44
5–1 Removing the Outside Cover ........................................................................... 5–4
5–2 Removing the Access Panel ............................................................................. 5–5
5–3 Removing the Picker Umbilical Cable Shield Rod ........................................... 5–5
5–4 Fastening Picker to the Service Position .......................................................... 5–6
5–5 Controller PCA Cables .................................................................................... 5–7
5–6 Controller PCA Mounting Screws and Tab Holes ............................................ 5–7
5–7 Front Bezel Mounting Screws ......................................................................... 5–9
5–8 Front Panel Tilted Out ................................................................................... 5–10
5–9 Replacing the Fan .......................................................................................... 5–10
5–10 Replacing the Display ................................................................................... 5–12
5–11 Mailslot Mounting Screws ............................................................................. 5–13
5–12 Mailslot Mounting Thumbscrew .................................................................... 5–13
5–13 Removing the RFI Shield .............................................................................. 5–15
5–14 Fastening Picker to the Service Position ........................................................ 5–15
5–15 Drive Cable Connections 1-Drive Version ..................................................... 5–16

Contents
EK–SOL46–SV. B01 vii
Figures (continued)
5–16 Drive Cable Connections 2-Drive (4X)Version .............................................. 5–17
5–17 Right–Side Drive Mounting Screws ............................................................... 5–17
5–18 Left–Side Drive Mounting Screws ................................................................. 5–18
5–19 Inserting the C1113 Disk Eject Tool .............................................................. 5–19
5–20 Dismounting the Carriage/Picker Assembly .................................................. 5–20
5–21 Removing the Carriage Shaft ......................................................................... 5–21
5–22 Removing the Leadscrew Mounting Screw .................................................... 5–22
5–23 Fastening Picker to the Service Position ........................................................ 5–23
5–24 Loosening the Power Cable Clamps .............................................................. 5–24
5–25 Removing the Leadscrew Assembly .............................................................. 5–25
5–26 Preparing the Leadscrew Assembly for Replacement ..................................... 5–26
5–27 Power Supply Removal (Single–Ended module shown) ................................. 5–27
5–28 Removing the Magazine Guides .................................................................... 5–28
5–29 RW546 Exploded View ................................................................................ 5–33
6–1 SCSI Command Translation for Autochanger Operation................................... 6–2
6–2 Autochanger Controller PCA Block Diagram .................................................. 6–5
6–3 Functional Diagram ......................................................................................... 6–7
6–4 4X Drive Functional Diagram ........................................................................ 6–10
6–5 Optical Disk Layout....................................................................................... 6–14
6–6 User Zone Layout for 650-Mbyte Media ........................................................ 6–16
6–7 User Zone Layout for 1.3 Gbyte Media, g=1 .................................................. 6–18
6–8 User Zone Layout for 1.3 Gbyte Media, g=16................................................. 6–19
6–9 User Zone Layout for 2.6 Gbyte, 1024 bytes/sector........................................ 6–22
6–10 User Zone Layout for 2.3 Gbyte, 512 bytes/sector.......................................... 6–23
6–11 Error Detection and Recovery ........................................................................ 6–31
Tables
1–1 Jukebox Capacities .......................................................................................... 1–4
1–2 RW546 Jukebox Product Matrix ........................................................................ 1–5
1–3 Optical Disk Standards Met by Digital Optical Disks ........................................ 1–9
3–1 UPS Power Requirements .................................................................................. 3–6
3–2 SCSI Cable Lengths .......................................................................................... 3–7
3–3 Autochanger Configuration Choices................................................................. 3–11
4–1 Sequence Tests................................................................................................... 4–2
4–2 Exerciser Tests .................................................................................................. 4–3
4–3 Electronic Core Tests......................................................................................... 4–5
4–4 Information Logs ............................................................................................... 4–9
4–5 List of Micro-Move Reference Table ............................................................... 4–13
4–6 Operation Errors - SCSI Connect Jukebox........................................................ 4–17
4–7 Recovery for Specific Hardware Errors............................................................ 4–30
5–1 Non-Exchange Assemblies............................................................................... 5–32
5–2 List of Field Replaceable Units ....................................................................... 5–36
5–3 Exchange Parts................................................................................................. 5–37
5–4 Common Resource Parts .................................................................................. 5–38
6–1 Values for n and m for 1.3–Gbyte with g=16 (1024 media) ............................. 6–20

Small Optical Disk Library RW546 Service Manual
viii EK–SOL46–SV. B01
Tables (continued)
6–2 Physical Revolution to Logical Track Layout .................................................. 6–20
6–3 4X 1,024 Bytes /Sector Disk Sector Structure................................................... 6–24
6–4 4X 512 Bytes /Sector Disk Sector Structure ..................................................... 6–25
6–5 Technical Comparisons of 1X, 2X, and 4X Optical Drives............................... 6–27
6–6 Error Thresholds ............................................................................................. 6–31
6–7 Group 0 Commands (6–byte command) .......................................................... 6–38

EK–SOL46–SV. B01 ix
Revision Record
This Revision Record provides a concise publication history of this manual. 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 manual.
Revision Level Date Summary of Changes
EK–SOL46–SV. A01 March 1997 First Edition
EK–SOL46–SV. B01 October 1997 Corrects Table 5–1. Also
adds recommended
service kits and common
resource parts to end of
Chapter 5.

EK–SOL46–UG. B01 xi
About This Manual
This manual describes how to install, configure, and maintain the small optical disk
library RW546. It also contains a chapter describing the theory of operation.
Audience
This manual supports trained service personnel for the small optical disk library
RW546.
Document Organization
This manual contains the following chapters:
Chapter 1: Product Information
Describes product features and possible configurations. Also contains a matrix of
environmental specifications.
Chapter 2: Environmental/Installation/PM
Describes site requirements, general checkout procedures, and preventive
maintenance.
Chapter 3: Product Configuration and Operation
Describes how to setup the RW546, connect to a host, and verify operation.
Chapter 4: Troubleshooting and Diagnostics
Describes how to use locally available error information plus external and
internal tests to determine corrective action.
Chapter 5: Removal and Replacement
Describes how to remove and replace sub-assemblies in the RW546 enclosure.
Also includes Field Replaceable Units (FRU’s), recommended service kits, and
common resource parts.