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EK-SOL10-SV-B01

May 1993

220 pages

Original

0.8MB

Document:	Small Optical Disk Library Service Manual
Order Number:	EK-SOL10-SV
Revision:	B01
Pages:	220
Original Filename:

OCR Text

Small Optical Disk Library
Service Manual
Part Number: EK–SOL10–SV.B01
Revision/Update Information:

Digital Equipment Corporation
Maynard, Massachusetts

This manual supersedes Part Number
EK–SOL10–SV.A01.

First printing, May 1993
Revision, October 1993
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 may 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.
Digital Equipment Corporation assumes no responsibility for the use or reliability of its software
on equipment that is not supplied by Digital or its affiliated companies.

© Digital Equipment Corporation 1993.
Reproduced with Permission of the Hewlett-Packard Company
The following are trademarks of Digital Equipment Corporation: DEC, Digital, VAX,
VAX DOCUMENT, VMS, and the DIGITAL logo.
Torx is a registered trademark of the Camcar Division of Textron.
All other trademarks and registered trademarks are the property of their respective owners.

U.S.A.
This equipment generates, uses, and may emit radio frequency energy. The equipment has
been type tested and found to comply with the limits for a Class A computing device pursuant
to Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable protection
against such radio frequency interference. Operation of this equipment in a residential area may
cause interference in which case the user at his own expense will be required to take whatever
measures may be required to correct the interference.

This document was prepared using VAX DOCUMENT, Version 2.1.

Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Introduction
1.1
1.2
1.3
1.3.1
1.3.2
1.4
1.4.1
1.4.2
1.5
1.6
1.7
1.8

Optical Disk Libraries Overview . . . . . . . . . . . . . . . . . . . .
Product Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optical Library Components . . . . . . . . . . . . . . . . . . . . . . .
The Optical Drive Mechanism . . . . . . . . . . . . . . . . . . .
Magneto-Optical Disks . . . . . . . . . . . . . . . . . . . . . . . . .
SCSI Interface Options . . . . . . . . . . . . . . . . . . . . . . . . . . .
Single-ended SCSI Interface . . . . . . . . . . . . . . . . . . . .
Differential SCSI Interface . . . . . . . . . . . . . . . . . . . . .
Product Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optical Disk Specifications . . . . . . . . . . . . . . . . . . . . . . . . .
Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1
1–1
1–2
1–4
1–5
1–5
1–5
1–6
1–6
1–7
1–12
1–14

2 Environmental/Installation/PM
2.1
Environmental Requirements . . . . . . . . . . . . . . . . . . . . . .
2.2
Operating Temperature/Clearance Requirements . . . . . . . .
2.3
Location Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4
Primary Power/External Ground . . . . . . . . . . . . . . . . . . . .
2.5
Unpacking Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6
Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.1
Contents of Shipment . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.2
Uncrating the RW504/RW524 Optical Library . . . . . . .
2.6.3
Installing the RW504/RW524 Optical Library . . . . . . .
2.6.4
Checking the Fuse and Voltage Setting . . . . . . . . . . . .
2.6.4.1
Changing the Voltage Configuration . . . . . . . . . . .
2.6.5
Connecting an Uninterruptible Power Supply
(UPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7
Hardware Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1
2–1
2–1
2–2
2–2
2–3
2–3
2–4
2–4
2–9
2–10
2–10
2–11

iii

2.8
2.8.1
2.8.2
2.9

Moving the RW504/RW524 Optical Disk Library . . . . . . . .
Moving a Short Distance . . . . . . . . . . . . . . . . . . . . . . .
Shipping the RW504/RW524 Optical Disk Library . . . .
Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . .

2–12
2–12
2–13
2–15

3 Product Operation and Configuration
3.1
Front Panel/Control Panel Operations . . . . . . . . . . . . . . . .
3.2
Rear Panel Features and Controls . . . . . . . . . . . . . . . . . . .
3.3
Setting and Displaying Configurations . . . . . . . . . . . . . . . .
3.3.1
Setting a Configuration (CONF) . . . . . . . . . . . . . . . . . .
3.3.2
Displaying Information Logs (INFO) . . . . . . . . . . . . . .
3.3.3
Choosing Tests and Displaying Results (TEST) . . . . . .
3.3.4
Setting the SCSI Address . . . . . . . . . . . . . . . . . . . . . . .
3.3.5
Securing the Optical Disk Library . . . . . . . . . . . . . . . .
3.3.6
Setting a New Security Code . . . . . . . . . . . . . . . . . . . .
3.3.7
Restricting Disk Insertion and Removal . . . . . . . . . . .
3.3.7.1
Setting CONF 15 or CONF 20 . . . . . . . . . . . . . . . .
3.3.8
Controlling Mailslot Rotation . . . . . . . . . . . . . . . . . . . .
3.3.9
Host Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4
Autochanger Configuration Choices . . . . . . . . . . . . . . . . . .

3–1
3–3
3–5
3–5
3–5
3–6
3–7
3–8
3–8
3–10
3–10
3–11
3–11
3–12

4 Troubleshooting and Diagnostics
Operation/Installation Error Information . . . . . . . . . . . . . .
Power-on Self-tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optical Disk Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning Tools Available . . . . . . . . . . . . . . . . . . . . . . .
Using the Eject Tool to Remove a Disk from the Drive . . .
Troubleshooting Using the Control Panel and
Observation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5.1
The Autochanger Lists the First ‘‘Possibles’’ . . . . . . . .
4.5.2
How to Use the Results of the Internal Tests . . . . . . . .
4.5.3
The FRU Isolation Test Sequence . . . . . . . . . . . . . . . .
4.6
Information Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7
Recovery from Hardware Errors . . . . . . . . . . . . . . . . . . . .
4.7.1
Hardware Error Codes and Recovery Procedures . . . . .
4.8
Error Information Through SCSI Commands . . . . . . . . . .
4.9
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.1
Offline Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.2
Internal Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . .
4.10
Diagnostic Test Command Descriptions . . . . . . . . . . . . . . .
4.10.1
Sequence Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1
4.2
4.3
4.3.1
4.4
4.5

4–2
4–6
4–7
4–8
4–9
4–10
4–11
4–12
4–14
4–15
4–20
4–20
4–30
4–31
4–32
4–32
4–33
4–34

4.10.2
Electronic Core Tests . . . . . . . . . . . . . . . . . . . . . . . . .
4.11
The FIND HOME Sequence and Information Logs . . . . . .
4.11.1
Specific Steps of the FIND HOME Sequence . . . . . . . .
4.12
Micro-Move Reference Table for Viewing FIND HOME
Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–38
4–41
4–41
4–44

5 Removal and Replacement
5.1
5.2
5.3
5.4
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.4.6
5.4.7
5.4.8
5.4.9
5.4.10
5.4.11
5.4.12
5.4.13
5.4.14
5.5
5.5.1
5.5.2
5.6
5.6.1

Field-Replaceable Assemblies . . . . . . . . . . . . . . . . . . . . . . .
ESD Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly/Disassembly Procedures . . . . . . . . . . . . . . . . . . .
Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Autochanger Controller PCA . . . . . . . . .
Replacing the Front Bezel Assembly . . . . . . . . . . . . . .
Replacing the Front Operation Switch/Cable
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Fan/Display/Operation Button
Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Mailslot Assembly . . . . . . . . . . . . . . . . .
Replacing the Optical Drive Mechanism . . . . . . . . . . .
Replacing the Interconnect PCA . . . . . . . . . . . . . . . . .
Replacing the Picker/Carriage Assembly . . . . . . . . . . .
Replacing the Leadscrew Assembly . . . . . . . . . . . . . . .
Replacing the Power Supply . . . . . . . . . . . . . . . . . . . .
Replacing the Magazine Guides . . . . . . . . . . . . . . . . . .
Replacing the Internal UPS Cable . . . . . . . . . . . . . . . .
Replacing the SCSI Cable . . . . . . . . . . . . . . . . . . . . . .
Reinitializing the Autochanger Controller PCA RAM after
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables Set by Configuration 16 . . . . . . . . . . . . . . . .
Variables Set by Configuration 18 . . . . . . . . . . . . . . . .
Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Service Kit . . . . . . . . . . . . . . . . . . . . . .

5–1
5–1
5–2
5–2
5–2
5–4
5–8
5–10
5–12
5–14
5–16
5–22
5–23
5–26
5–29
5–31
5–33
5–33
5–34
5–34
5–35
5–36
5–36

6 Theory of Operation
6.1
6.1.1
6.1.2
6.2
6.3
6.4

The Autochanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Movements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mechanics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Autochanger Controller PCA . . . . . . . . . . . . . . . . . . . .
The Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Multifunction Optical Drive and Drive Controller . . . .

6–1
6–1
6–4
6–4
6–7
6–8

Controller PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCSI Controller . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Formatter/Sequencer . . . . . . . . . . . . . . . . . . . . . . .
Servo PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DSP Microprocessor and Support/Servo Control
Loops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.4.2.2
Read and Write Channel Electronics . . . . . . . . . . .
6.4.3
Mechanism Assembly . . . . . . . . . . . . . . . . . . . . . . . . . .
6.4.3.1
Loader Mechanism . . . . . . . . . . . . . . . . . . . . . . . . .
6.4.3.2
Optical Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.5
Optical Disk Layout and Error Correction . . . . . . . . . . . . .
6.5.1
Optical Disk Layout—650-Mbyte Capacity . . . . . . . . . .
6.5.2
User Zone Layout—650-Mbyte Capacity . . . . . . . . . . .
6.5.3
Optical Disk Layout—1.3-Gbyte Capacity . . . . . . . . . .
6.5.4
User Zone Layout—1.3-Gbyte Capacity . . . . . . . . . . . .
6.5.5
Drive Defect Management . . . . . . . . . . . . . . . . . . . . . .
6.5.6
Slip Sparing Algorithm . . . . . . . . . . . . . . . . . . . . . . . .
6.5.7
Replacement Sparing Algorithm . . . . . . . . . . . . . . . . .
6.5.8
Error Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.6
Error Detection and Recovery . . . . . . . . . . . . . . . . . . . . . .
6.6.1
Error Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.6.2
Error Recovery Processes . . . . . . . . . . . . . . . . . . . . . . .
6.6.3
SCSI Detected Errors . . . . . . . . . . . . . . . . . . . . . . . . . .
6.6.4
Move Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.6.5
Hardware Error Codes . . . . . . . . . . . . . . . . . . . . . . . . .
6.6.6
Real Time Event Logging . . . . . . . . . . . . . . . . . . . . . . .
6.7
The SCSI Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.7.1
SCSI Command Set . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.4.1
6.4.1.1
6.4.1.2
6.4.1.3
6.4.2
6.4.2.1

6–8
6–9
6–9
6–9
6–9
6–9
6–10
6–10
6–10
6–10
6–10
6–11
6–11
6–14
6–14
6–18
6–20
6–20
6–21
6–22
6–23
6–24
6–24
6–25
6–26
6–26
6–27
6–27

A Offline Diagnostic Information
A.1
A.2
A.3
A.4

System Error Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Autochanger Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . .
Drive SCSI-2 Reference . . . . . . . . . . . . . . . . . . . . . . . . . . .
Offline Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A–1
A–3
A–13
A–27

B Basic Supplies and Reorderable Parts
B.1

Basic Supplies and Reorderable Parts . . . . . . . . . . . . . . . .

B–1

C Connecting Multiple Optical Libraries
C.1
C.2
C.3

Connecting Two Optical Library Units to Two SCSI Ports
..............................................
Connecting Two Optical Library Units to One SCSI
Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resetting Controller and Drive SCSI Addresses . . . . . . . .

C–1
C–2
C–3

Index
Figures
1–1
2–1
2–2
2–3
2–4
3–1
3–2
4–1
4–2
4–3
4–4
5–1
5–2
5–3
5–4
5–5
5–6
5–7
5–8
5–9

Optical Disk Library Components . . . . . . . . . . . . . . . .
Removing the Shipping Screw . . . . . . . . . . . . . . . . . . .
Attaching the SCSI Cable to the RW504/RW524
Optical Disk Library . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Shipping Screw . . . . . . . . . . . . . . . . . . .
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Information and Tests Through the Control Panel . . . .
The Autochanger Returns Suspect FRUs . . . . . . . . . . .
How Service Views the Suspect FRUs . . . . . . . . . . . . .
Information and Tests Through the SCSI Bus . . . . . . .
Controller PCA Cable Connections . . . . . . . . . . . . . . . .
Removing the Autochanger Controller PCA . . . . . . . . .
Dip Switch Location on the Controller PCA . . . . . . . . .
Front Bezel Mounting Screws . . . . . . . . . . . . . . . . . . .
Disconnecting the Mailslot Sensor Cable and Front
Panel Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Display Assembly . . . . . . . . . . . . . . . . .
Mailslot Mounting Screws . . . . . . . . . . . . . . . . . . . . . .
Picker Service Position . . . . . . . . . . . . . . . . . . . . . . . . .
Optical Drive Mechanism Cable Connections . . . . . . . .

1–3
2–4
2–6
2–8
2–14
3–1
3–3
4–10
4–11
4–13
4–31
5–5
5–6
5–7
5–9
5–10
5–13
5–15
5–17
5–18

vii

5–10
5–11
5–12
5–13
5–14
5–15
5–16
5–17
5–18
5–19
5–20
5–21
5–22
5–23
5–24
6–1
6–2
6–3
6–4
6–5
6–6
6–7
6–8
A–1
A–2
A–3
A–4
C–1

viii

Drive Mounting Screws and Optical Sensor Cable
Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sliding the Drive Mechanism Out of the Library . . . . .
Removing the Drive Plate and Optical Sensor . . . . . . .
Removing the Interconnect PCA . . . . . . . . . . . . . . . . .
Removing the Carriage/Picker Assembly . . . . . . . . . . .
Removing the Carriage Shaft . . . . . . . . . . . . . . . . . . . .
Removing the Leadscrew Mounting Screw . . . . . . . . . .
Securing the Picker to the Top of the Autochanger . . .
Removing the Leadscrew Assembly . . . . . . . . . . . . . . .
Preparing the Leadscrew Assembly for
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Power Supply Assembly . . . . . . . . . . . .
Removing the Magazine Guides . . . . . . . . . . . . . . . . . .
Optical Disk Library Exploded View (Sheet 1 of 3) . . .
Optical Disk Library Exploded View (Sheet 2 of 3) . . .
Optical Disk Library Exploded View (Sheet 3 of 3) . . .
SCSI Command Translation for Autochanger
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Autochanger Controller PCA Block Diagram . . . . . . . .
Functional Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optical Disk Layout . . . . . . . . . . . . . . . . . . . . . . . . . . .
User Zone Layout for 650-Mbyte Media . . . . . . . . . . . .
User Zone Layout for 1.3-Gbyte Media, g=1 . . . . . . . . .
User Zone Layout for 1.3-Gbyte,g=16 . . . . . . . . . . . . . .
Error Detection and Recovery . . . . . . . . . . . . . . . . . . .
System Error Report . . . . . . . . . . . . . . . . . . . . . . . . . .
Jukebox Request Sense Data Parameter Block
Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jukebox Request Sense—Additional Sense Data . . . . .
Drive Request Sense Data Parameter Format . . . . . . .
Connecting Two Optical Library Units (RW504/RW524)
to One SCSI Port . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–19
5–20
5–21
5–23
5–24
5–25
5–26
5–27
5–28
5–29
5–30
5–32
5–39
5–40
5–41
6–2
6–5
6–8
6–12
6–13
6–15
6–16
6–22
A–2
A–3
A–5
A–14
C–2

Tables
1
1–1
1–2
1–3
1–4
1–5
2–1
2–2
3–1
3–2
3–3
4–1
4–2
4–3
4–4
4–5
4–6
4–7
5–1
5–2
5–3
6–1
6–2
6–3
6–4
6–5
6–6
A–1
A–2
A–3
A–4
A–5

Conventions Used in This Guide . . . . . . . . . . . . . . . . .
RW504/RW524 Components . . . . . . . . . . . . . . . . . . . . .
Optical Disk Library Products Matrix . . . . . . . . . . . . .
Specifications and Characteristics of Optical Disks . . .
Related Documentation . . . . . . . . . . . . . . . . . . . . . . . .
Pass Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Specifications and Part Numbers . . . . . . . . . . . .
UPS Power Requirements . . . . . . . . . . . . . . . . . . . . . .
Front Panel Controls . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Panel Features and Controls . . . . . . . . . . . . . . . .
Autochanger Configuration Choices . . . . . . . . . . . . . . .
Operation/Installation Troubleshooting . . . . . . . . . . . .
Information Logs (INFO Logs) . . . . . . . . . . . . . . . . . . .
Recovery Procedures for Specific Hardware Errors . . .
Sequence Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exerciser Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Core Tests . . . . . . . . . . . . . . . . . . . . . . . . . .
RW504/RW524 Micro-Move ID Table . . . . . . . . . . . . . .
SW2 Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . .
Exchange Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . .
Non-exchange Assemblies . . . . . . . . . . . . . . . . . . . . . .
Values for n and m for 1.3-Gbyte with g=16 (1024
media) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Physical Revolution to Logical Track Layout . . . . . . . .
Error Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Group 0 Commands (6-byte command) . . . . . . . . . . . .
Group 1 and 2 Commands (10-byte command) . . . . . . .
Group 5 Commands (12-byte command) . . . . . . . . . . . .
Sense Key and Additional Sense Length Values . . . . .
Autochanger Move Errors . . . . . . . . . . . . . . . . . . . . . .
Autochanger Micro-Move Error Codes . . . . . . . . . . . . .
Drive Request Sense - Additional Sense Code
Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HP-Specific Drive Error Codes . . . . . . . . . . . . . . . . . . .

xii
1–4
1–6
1–12
1–14
1–14
2–9
2–11
3–2
3–3
3–12
4–2
4–16
4–21
4–34
4–36
4–38
4–44
5–8
5–36
5–37
6–17
6–17
6–22
6–28
6–29
6–30
A–4
A–9
A–11
A–16
A–19

Preface
This manual assumes you are familiar with computer terms. It is divided into
seven chapters and three appendixes and is organized to allow you to quickly
find the information that you need.
This manual contains the following information:
•

Chapter 1 provides an introduction that lists the features and components,
product configurations, and the characteristics of the drive mechanism and
the disks for the RW504-ZA and the RW524-ZA optical disk libraries. This
manual refers to these optical disk libraries as RW504 and RW524.

•

Chapter 2 provides environmental, installation and preventive maintenance information on the RW504 and RW524 optical disk libraries.

•

Chapter 3 provides configuration and operating information on the RW504
and RW524 optical disk libraries.

•

Chapter 4 provides troubleshooting and diagnostics information on the
RW504 and RW524 optical disk libraries.

•

Chapter 5 provides removal and replacement procedures for the fieldreplaceable assemblies in the RW504 and RW524 optical disk libraries.

•

Chapter 6 provides theory of operation information on the RW504 and
RW524 optical disk libraries.

•

Appendix A provides offline diagnostic information, a VAX system error
report sample and SCSI-2 reference.

•

Appendix B provides a list of basic supplies and reorderable parts.

•

Appendix C lists information about, and procedures for, connecting multiple
optical libraries.

Conventions Used in This Guide
Table 1 Conventions Used in This Guide

xii

Convention

Use

Italics

Italic text is used for titles of manuals and other publications.

Monospace type

Anything that is displayed on the control panel of the
optical disk library is set in this monospace type.

Boldface type

Anything that you are asked to type is set in this
boldface type.

Keys

Keys indicate the key to press on the control panel of the
optical disk library.

Note

A note calls attention to information which is helpful in
understanding the operation of the product.

CAUTION

Caution notes provide information that protects your optical
disk library from being damaged.

WARNING

Warning notes provide information that protects you from being
harmed.

1
Introduction
1.1 Optical Disk Libraries Overview
The RW504-ZA and RW524-ZA are optical disk libraries that contain a
multifunction optical drive. They have storage slots for sixteen 5.25-inch
optical disks for a total storage capacity of 10 Gbytes or 20 Gbytes, respectively.
Both rewritable and write-once optical disks can be used; they must be 512 bytes
per sector format.
There are two basic optical disk libraries:
•

RW504-ZA (known as the RW504)

•

RW524-ZA (known as the RW524)

The main difference between these two library versions is storage capacity. The
RW524 has approximately twice the storage capacity of the RW504. This added
capacity is due to a difference in the optical drives contained in the libraries. The
RW524 contains a 1.3-Gbyte drive, an enhanced version of the 650-Mbyte drive
that is used in the RW504 version libraries. The 1.3-Gbyte drive supports the use
of 1.2-Gbyte disks as well as the 594-Mbyte disks that are supported for use with
650-Mbyte drives. Other than the added support of 1.2-Gbyte disks, the RW524
libraries are mechanically, electrically, and operationally the same as the RW504
libraries, and both versions support the SCSI-2 command set.

1.2 Product Features
The optical disk library has the following features and meets the following
specifications:
•

Direct online access to data

•

High reliability and data security when using rewritable and write-once
5.25-inch optical disks

Introduction 1–1

DEC magneto optical disks meet the following standards:
594 Mbyte rewritable optical disks are Continuous Composite (CC)
format, conform to ISO/IEC 10089A; ANSI X3.212-199x and 1.2 Gbyte
optical disks meet ECMA 184 standard for CC format.
594 Mbyte write-once disks are Continuous Composite Write-Once (CCW)
format, conform to ISO/IEC DIS 11560; ANSI X3.220-199x and 1.2 Gbyte
optical disks meet ECMA 184 standard for CCW format.
•

Data security through the ability to ‘‘lock’’ the library, preventing disk
removal.

•

SCSI Interface
Single-ended
SCSI-2 command set

•

Autochanger reliability of:
40,000 hours MTBF (Mean Time Between Failure)
300,000 MSBF (Mean Swaps Between Failure)

•

Modular replacement of all major assemblies

•

Digital signal processor (DSP) based servo built into the drive mechanism for
faster seek times and lower error rates

•

Split optics resulting in the use of a lighter optical head for faster and more
accurate data access

•

Full read and write data caching to optimize system performance

1.3 Optical Library Components
Usually each SCSI-connect peripheral requires one SCSI address. With the disk
library, however, there are two unique SCSI interface addresses— one SCSI
address for the autochanger controller and one for the drive contained in the disk
library.
The autochanger controller and the host operating system manage communication
through the SCSI bus to each drive’s unique SCSI address.
Table 1–1 is a discussion of the optical library components. Refer to Figure 1–1
for component locations.

1–2 Introduction

Figure 1–1 Optical Disk Library Components

6 Carriage & Rails

3 Mailslot

2 Storage Slots

7 Picker

1 Disk Drive
MK445−01

Introduction 1–3

Table 1–1 RW504/RW524 Components
Component

Description

Disk Drive

The optical disk library contains one multifunction optical
disk drive for read/write data transfer. The drive requires
its own unique SCSI address and is located next to the front
panel at the bottom of the optical library. See Section 1.3.1 for
additional drive information.

Storage Slots

The optical disk library contains 16 storage slots for holding
optical disks.

Mailslot

The mailslot is used to insert or remove optical disks from the
disk library.

Front Panel

The front panel includes a control panel used to manage and
display library functions and a mailslot for inserting and
removing disks. Control panel functions are described in
Section 3.1.

Rear Panel

The rear panel includes SCSI and power cord connections,
a fuse receptacle, a 9-pin serial connector for attaching an
uninterruptable power supply (UPS), and a voltage select
switch.

Rail and Carriage

The rail and carriage support the picker for its movement
within the disk library.

Picker

The picker rotates, flips, and transports optical disks to and
from the storage slots, mailslot, and optical drive.

The RW504/RW524 is available as a single-ended SCSI interface.

1.3.1 The Optical Drive Mechanism
The optical drive mechanism is a multifunction drive and, therefore, operates
in both rewritable and write-once modes. The drive uses both rewritable and
write-once 5.25-inch magneto-optical disks that comply with ANSI and ISO
standards for Continuous Composite format. The drive senses the disk type and
automatically operates in either rewritable or write-once mode.
The drive has a 3600 rpm rotational speed and can achieve a maximum sustained
write transfer rate of 0.5 to 0.8 Mbytes per second and a maximum sustained
read transfer rate of 1- to 1.6-Mbyte per second, depending on the media and

drive capacity. The error rate is less than one block in error per 14 bytes.
Immediate response mode and write caching are used by the drive mechanism
to achieve its high write performance. However, if a power failure occurs while
write data is in the buffer, the drive may not have enough power to complete
the write operation and empty the buffer. Therefore we recommend that an

1–4 Introduction

uninterruptable power supply (UPS) be used with battery backup to ensure that
no data is lost if a power failure occurs.

1.3.2 Magneto-Optical Disks
Magneto-Optical (MO) disks are more durable, more reliable, removable, and cost
far less per megabyte than magnetic disks. MO disks are made of the same kind
of plastic used in bullet-proof windows. Data can be read through fingerprints
and minor scratches. MO disks can withstand x-rays, magnetic interference, and
can be dropped from desk height without damage.
Magneto-Optical disks store data on a magnetic layer in the form of magnetic
flux reversals rather than on a pitted surface used in other optical technologies.
Because surfaces of the MO disk are not physically changed, they can be written
to and erased repeatedly with no measurable data degradation. Optical disks
have an archival life of thirty years based on accelerated life tests for data
retention.
The disk is mounted in a rigid plastic case with a metal shutter, similar to a
3.5-inch magnetic flexible disk. Optical disk storage capacity varies depending
on the disk type. (Check the host system documentation to determine which disk
format is supported.) The MO disk has two recording sides. To access the second
side, the cartridge must be ejected, turned over, and reinserted into the drive.
There are two types of magneto-optical disks: rewritable optical disks and writeonce optical disks. (Check the host system documentation to determine which
disk type(s) are supported.) The two disk types can be differentiated by the words
‘‘rewritable’’ or ‘‘write-once’’ printed on the disk’s metal shutter.
For data safety, you can independently write-protect each side of the disk by
setting the write-protect tab on the corner of the cartridge.

1.4 SCSI Interface Options
The optical disk library connects to the host system with a single-ended SCSI
interface This interface conforms to SCSI standards ANSI X3.131-SCSI-2.

1.4.1 Single-ended SCSI Interface
The single-ended interface specifies the use of a single-ended SCSI repeater PCA.
This PCA enables the library to be connected to an external single-ended SCSI
bus. The total SCSI cable length between peripherals and the host is 6 meters.
In addition, an internal SCSI cable length of 2.1 meters must be included in this
calculation.

Introduction 1–5

1.4.2 Differential SCSI Interface
The differential SCSI interface specifies the use of a differential SCSI repeater
PCA. This PCA enables the library to be connected to an external differential
SCSI bus. The differential SCSI repeater PCA uses the equivalent of 10 meters
of SCSI cable internally, so the allowable external cable length is limited to 15
meters instead of the 25 meters usually allowed on a differential SCSI bus.

1.5 Product Matrix
The following products are discussed in this manual. To determine the product
and option numbers, find the product information labels located on the library’s
rear panel and check the corresponding information in Table 1–2.
Table 1–2 Optical Disk Library Products Matrix
Product No.
/Options

Description

HP Designation

RW504-ZA

10.4-Gbyte multifunction optical disk library—
includes one 650-Mbyte 5.25-inch multifunction
optical drive mechanism and a single-ended SCSI
interface.

Model 10LC
(C1718C)

RW524-ZA

20.8-Gbyte multifunction optical disk library—
includes one 1.3-Gbyte 5.25-inch multifunction
optical drive mechanism and a single-ended SCSI
interface.

Model 20LT
(C1718T)

RW524-UB

Converts 650-Mbyte multifunction drives to 1.3
Gbyte multifunction drives to be used with a
RW504 jukebox. Consists of one 1.3-Gbyte drive,
RFI shield, and installation guide.

1–6 Introduction

1.6 Specifications
This section provides:
•

Performance Specifications

•

Physical Characteristics

•

Environmental Specifications

•

Power Requirements

•

Service Characteristics

•

Product Certification

Introduction 1–7

Performance Specifications
Optical Disk Library System
Capacity

16 disks
10.4 Gbytes (RW504) or
20.8 Gbytes (RW524)

Drives

1, 5.25-inch multifunction 650-Mbyte (RW504)
or 1.3-Gbyte (RW524)
optical disk drive

Average disk exchange time (excluding
drive load/unload sequences)

7 seconds

Interface

Single-ended asynchronous SCSI
Multifunction Optical Drives
650 Mbytes

1.3 Gbytes

Rotational speed

3600 rpm

2400 rpm

Average seek

25 ms

23.5

Short stroke seek (across 2.2 Mbytes)

8 ms

4 ms

Full stroke seek

50 ms

45 ms

Single track seek (track-to-track)

2 ms

Average rotational delay

8.33 ms

12.5 ms

Bias magnet rotation time

8 ms (maximum)

Average access time

35 ms

Burst transfer rate

3 Mbytes/s (asynchronous)

3 Mbytes/s
(asynchronous)

5 Mbytes/s (synchronous)

5 Mbytes/s
(synchronous)

1 Mbyte/s (read)

.8-1.6 Mbyte/s
(read)

.5 Mbytes/s (write)

.4-.8 Mbytes/s
(write)

Load time (including spin-up)

2.5 seconds (average)

2.3 seconds
(average)

Unload time (including spin-down)

2.0 seconds (average)

1.4 seconds
(average)

Data transfer rate (host dependent)

1–8 Introduction

Multifunction Optical Drives
650 Mbytes

1.3 Gbytes

Read/Write error rate

Less than 1 block in
error per  14 bytes

Less than 1 block
in error per  14
bytes

Seek error rate

Less than 1 per  5
seeks

Interface

SCSI-2
single-ended

RW504/RW524 Physical Characteristics
Height

493.8 mm (19.4 in)

Width

220.0 mm (8.7 in)

Depth

693.4 mm (27.3 in)

Weight (net)

34.9 kg (77.5 pounds)

Weight (packaged)

40.8 kg (90.0 lbs)
RW504/RW524 Environmental Specifications

Temperature gradient

10° C per hour

Temperature (operating)

10° to 40° C

Temperature (nonoperating)

-40° to 70° C

Relative humidity (noncondensing)
operating

10 to 90%

nonoperating

5 to 95%

Max. wet bulb temperature

29° C

Shock (nonoperating)

292 ips (30 g trapezoidal)

Vibration (5-500 Hz)
operating

~0.21 g rms

nonoperating, random

~2.09 g rms

nonoperating swept-sine

0.5 g peak

Altitude (operating)

15,000 ft (4,572 m)

Altitude (nonoperating)

50,000 ft (15,240 m)

Acoustic emissions

Introduction 1–9

RW504/RW524 Environmental Specifications
operating

61.5 dB (L noise power
emission level)

idle

47 dB (L noise power
emission level)

Particulates

Less than 200
micrograms/cubic meter
particles suspended

Electrostatic discharge
Airgap (operating)

0 to 10 kV

Airgap (nonoperating survival)

0 to 25 kV

Direct contact (operating)

0 to 5 kV

Direct contact (nonoperating survival)

0 to 8 kV

Cooling requirements

15 CFM bidirectional
through drive

RW504/RW524 Power Requirements
Line voltage (115V setting)

100-127V

Line voltage (230V setting)

200-240V

Line frequency

50-60Hz

Power consumption (typical)

Less than 70 W

Power consumption (maximum)

100 W

RW504/RW524 Service Characteristics
Mean time between failure

40,000 power-on hours

Mean swaps between failure

300,000

Mean time to repair

1 hour

Preventive maintenance

none required
RW504/RW524 Product Certifications

Safety

1–10 Introduction

EN 60950/IEC 950
UL 1950 listed or
recognized
CSA 950-M89
TUV approved to VDE
0805 05.90

RW504/RW524 Product Certifications
Electromagnetic emissions

FCC 47 CFR Part 15
Subpart J - Class ‘‘B’’
EN 55022/CISPR 22,
Level ‘‘B’’; SABS
VCCI Level 2

Laser

CDRH 21 CFR Chapter
1, Subpart J Registered
IEC 825
TUV approved to
VBG93, VDE 0837
TTL to Decision 472
BS 4803 part 2
Approved

Introduction 1–11

1.7 Optical Disk Specifications

Table 1–3 Specifications and Characteristics of Optical Disks
Physical Characteristics

Rewritable

Write-once

Disk

5.25 in. diameter (130 mm)

5.25 in. diameter (130
mm)

Capacity (512-byte
sectors) (1x)1

594 Mbytes (297 Mbytes/side)
(formatted)

594 Mbytes (297 Mbytes
/side) (formatted)

Capacity (512-byte
sectors) (2x)2

1.2 Gbytes (594 Mbytes/side)
(formatted)

1.2 Gbytes (594 Mbytes
/side) (formatted)

Format (1x)

Continuous Composite (CC)
(ISO 10089)

CCW (ISO 11560)

Format (2x)

Continuous Composite (CC)
(ISO 10089),ECMA 184 for CC
format

CCW (ISO 11560), ECMA
184 standard for CCW
format

Bytes per sector

512 (medium dependent)

Sectors per track

31 (medium dependent)

Physical tracks per side
(1x)

18751

Physical tracks per side
(2x)

21600

Physical tracks per inch
(1x)

15875

Physical tracks per inch
(2x)

18273

Error Rate

Less than 1 block in error per
 14 bytes

Less than 1 block in error
per  14 bytes

Security

Write protect tab (1 per side)

Write protect tab (1 per
side)

Medium archival life

30 years

1 In this table, 1x refers to 594-Mbyte.
2 In this table, 2x refers to 1.2-Gbyte.

(continued on next page)

1–12 Introduction

Table 1–3 (Cont.) Specifications and Characteristics of Optical Disks
Environmental
Specifications

Rewritable

Write-once

Temperature (operating)

10° to 50° C

Temperature (nonoperating)

-10° to 50° C long term
(> 14 days)

-10° to 55° C short-term (
days)

-10° to 55° C short-term (
14 days)

Temperature gradient

10° C per hour

Maximum wet bulb
temperature

29° C

Humidity (operating)

10 to 80 percent (noncondensing)

10 to 80 percent
(noncondensing)

Humidity (nonoperating)

10 to 90 percent (noncondensing)

10 to 90 percent
(noncondensing)

Introduction 1–13

1.8 Related Documents

Table 1–4 Related Documentation
Item

Part Number

Optical Disk Library Conversion Kit Installation Guide

EK–OLCON–IG

Optical Library User’s Guide (Shipped with each unit)

EK–STSOP–UG

Optical Storage Desktop Software Installation Guide

AA–PXYKA–TE

Optical Storage Desktop Software User’s Guide

AA–PXYLA–TE

Optical Storage Management Software Installation Guide

AA–PXYPA–TE

Optical Storage Management Software Installation Guide

AA–PXYQA–TE

Storage Server 100 Installation Guide

EK–D59SS–IN

Small Optical Disk Library Service Manual

EK–SOL10–SV

Medium Optical Disk Library Service Manual

EK–MOL20–SV

Large Optical Disk Library Service Manual

EK–SS100–SV

Storage Server 100 Optical Disk Service Manual

EK–STSOP–SV‡

Optical Disk Library System Technical Reference Manual

5959-3559 (GSD)†

Technical Guide Optical Drives and Libraries

5960-7605†

Optical Drive and Library SCSI-2 Command Reference

5960-7606†

Offline Diagnostics for HP Optical Products

5960-7626†

†These documents can be ordered directly from Hewlett-Packard
‡Only for older model 10/20 Jukebox shipped with (Ninja) storage server systems

Table 1–5 Pass Documents
Pass

Entry Number

RW5xx Hardware Pass

7174

Ninja Hardware Pass

6060

Optical Storage Management Software Pass

3731

Optical Storage Desktop Software Pass

3750

1–14 Introduction

2
Environmental/Installation/PM

2.1 Environmental Requirements
Note
The environmental requirements listed here apply when the RW504
/RW524 optical disk library is not connected to a system. When this
device is connected to a system, the more stringent environmental
specifications listed for any single device within the system are applicable
and supersede these specifications.

2.2 Operating Temperature/Clearance Requirements
The RW504/RW524 optical disk library 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° C (50° F) per hour.
A minimum 70-80 mm (3 in.) is required behind the RW504/RW524 optical disk
library rear panel to allow air circulation.

2.3 Location Requirements
Position the autochanger away from sources of particulate contamination such
as frequently-used doors and walkways, stacks of supplies that collect dust, and
smoke-filled rooms.

Environmental/Installation/PM 2–1

2.4 Primary Power/External Ground
The power outlet to be used to supply AC power to the RW504/RW524 optical
disk library must be checked to ensure that the proper voltage is available for
the drive. Permitted voltage range(s), depending on configuration and assuming
50-60 Hz, are 100 to 120 Vac and 200 to 240 Vac. Also check the earth (safety)
ground in the power outlet.

2.5 Unpacking Procedure
Check that all materials are included with the disk library (Section 2.6.1). If any
items are missing, please contact the factory Order Processing Center with the
following information:
•

Original order number or unit serial number

•

Receiving address

If the unit is damaged, it will be repaired or replaced. Billing of the charges
depends on whether the damage was caused by the carrier or the factory
packaging. 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 concerning the unit.

2–2 Environmental/Installation/PM

2.6 Installation Procedures
This section provides information on:
•

Contents of shipment

•

Uncrating and installing an RW504/RW524 optical library

•

Connect multiple optical library systems together

Setting up the optical disk library is the customer’s responsibility; however this
service may be contracted for on a time-and-materials basis. Setup instructions
for the disk library are in the Optical Library User’s Guide, part number
EK–STSOP–UG, which is shipped with the product.
The installation and configuration instructions are provided for situations where
the customer has arranged for this service.
Note
Before you connect the optical disk library to the host, verify that the host
supports it. Refer to the Product Support Plan for the most current list of
host systems that support the RW504/RW524 optical disk library.

CAUTION
The shipping screw must be removed from the disk library before
connecting power. Directions for removing the shipping screw are printed
on the carton, or see Figure 2–1 for the location of the shipping screw.

2.6.1 Contents of Shipment
You should receive a crate containing the RW504/RW524 optical library, and
a box, shipped separately, labeled OPEN FIRST. Inside this box are several
additional packages containing the following:
•

READ ME FIRST instructions

•

Optical Library User’s Guide

•

SCSI cable

•

SCSI terminator

•

Power cord

Environmental/Installation/PM 2–3

In addition to these items, to complete the installation you may need two
wrenches—a 1/2 inch wrench and a 9/16 inch wrench—and a TORX T10, T15,
T20, and T25 screwdriver (the blade is star-shaped) as well as wire cutters or a
knife.

2.6.2 Uncrating the RW504/RW524 Optical Library
1. Uncrate the Optical Library. Remove the packaging material.
2. Lay the unit on its side and remove the shipping screw as shown in
Figure 2–1.
Figure 2–1 Removing the Shipping Screw

Shipping screw
location

MK445−02

2.6.3 Installing the RW504/RW524 Optical Library
The optical disk library has a single-ended SCSI interface. The total allowable
cable lengths for a single-ended SCSI is 3.9 meter.
CAUTION
Do not switch off power to any peripheral on the SCSI bus if the bus is
active. Switching off power to a peripheral on an active bus may cause
data loss, indeterminite bus states, or both.

2–4 Environmental/Installation/PM

Connecting the SCSI Cables
To connect the SCSI cables to the optical library, perform the following steps.
1. Make sure the host computer and the optical library are switched off.
2. Locate a SCSI cable.
3. Locate the single-ended SCSI terminator.
4. Is there another SCSI device connected to the host computer?

NO
a. Connect the SCSI cable to a SCSI socket on the rear of the autochanger.
Press in fully (see Figure 2–3).
b. Plug the terminator into the other SCSI socket.
c.

Connect the other end of the SCSI cable to the SCSI interface on the
computer (Figure 2–2). Press in fully.
NOTE

Before you connect the SCSI cable to the Host computer, verify the
SCSI IDs to ensure that bus address conflicts do not exist. Refer to
Section 3.3.4.

Environmental/Installation/PM 2–5

Figure 2–2 Attaching the SCSI Cable to the RW504/RW524 Optical Disk Library

MK445−06

Note
You can position the optical library anywhere along the SCSI bus.
Properly terminate the last device on the bus and do not exceed the total
SCSI cable length limitations.

YES
a. Determine which SCSI device is last on the chain of SCSI connections.
b. Check SCSI IDs first, then remove the terminator from the SCSI socket
on the last device and connect the optical library SCSI cable to that
socket. Press in fully.
c.

Connect the other end of the SCSI cable to one of the SCSI sockets on the
back of the optical library. Press in fully (see Figure 2–3).

d. Plug the terminator into the other SCSI socket on the back of the optical
library.

2–6 Environmental/Installation/PM

Connecting Power
CAUTION
Verify that the shipping screw has been removed from the disk library
before connecting power. Directions for removing the shipping screw are
printed on the carton, or see Figure 2–1 for the location of the shipping
screw.

1. Check the fuse and the voltage select switch setting (Section 2.6.4).
2. Check to make sure that the power switch (located on the rear panel) and the
operation switch (located on the front panel) are switched off.
3. Locate the power cord.
4. Plug the power cord into the AC line connector located on the rear panel.(See
Figure 2–3)

Environmental/Installation/PM 2–7

Figure 2–3 Rear Panel

3 Power Switch

4 Voltage Select Switch

1 Power Connector

2 SCSI Connector

MK445−05

5. Plug the power cord into the power outlet.
6. Press the power switch (located on the back panel) and the operation switch
(located on the front panel) so they are in the ON position.
Initially, the control panel displays TESTING. Once the power-on test
completes, the control panel displays READY.
7. If necessary, set SCSI IDs to values for your configuration (Section 3.3.4).
Note
A sequence of tests that are run when the disk library is first switched on.
The READY status on the control panel indicates that the unit is in sound
condition. If a TEST FAIL status appears on the control panel display, refer
to Chapter 4, Troubleshooting and Diagnostics for information on how to
resolve the problem.

2–8 Environmental/Installation/PM

Note
If you want to move the optical library, see Chapter 3.

2.6.4 Checking the Fuse and Voltage Setting
The RW504/RW524 optical disk library should come from the factory configured
according to the area designated as the final destination on the order form. Verify
that the drive was configured correctly.
CAUTION
Do not switch off power to any peripheral on the SCSI bus without first
checking that the bus is inactive.
Switching off power to a peripheral on an active bus may cause data loss,
indeterminite bus states, or both.

1. Remove power from the autochanger.
a. Press the operation switch (located on the front panel) so that it is in the
‘‘OFF’’ position.
b. Press the power switch (located on the rear panel) so that it is in the
‘‘OFF’’ position.
c.

Disconnect the power cable.

2. Verify that the correct fuse is in the fuseholder cap. Refer to Figure 2–3 for
the location of the AC line fuse and Table 2–1 to identify the correct fuse.
Table 2–1 Fuse Specifications and Part Numbers
Operation

Fuse

HP Part Number

120 volt (115 VAC nom.)

3 A 250 V

2110-0003

220 volt (230 VAC nom.)

3 A 250 V

2110-0780

Environmental/Installation/PM 2–9

2.6.4.1 Changing the Voltage Configuration

CAUTION
Do not switch off power to any peripheral on the SCSI bus without first
checking that the bus is inactive.
Switching off power to a peripheral on an active bus may cause data loss,
indeterminite bus states, or both.

Disconnect the power cable.

2. Set the voltage select switch to the correct setting.
a. Locate the voltage select switch on the rear panel of the autochanger.
b. If the voltage switch setting is incorrect, change it by sliding the voltage
select switch sideways using a flat-blade screwdriver.

2.6.5 Connecting an Uninterruptible 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). The UPS
can be connected directly to the disk library or it can be a central UPS used by
the entire computer system.
If a power failure occurs during a write operation, the UPS will continue to
supply power to the auto changer/computer system until the data in the optical
drive’s buffer can be written to an optical disk.
For the best protection, the customer should choose the type of UPS that provides
a communication link between the UPS and the autochanger/computer system.
With this type of connection, the computer system/autochanger senses when
power is being supplied by the UPS. Any data currently in the buffer is written
to the disk, and no additional commands are accepted until regular power is
restored.

2–10 Environmental/Installation/PM

Note
If the customer’s UPS does not provide a communication link between the
UPS and the autochanger/computer system, someone will have to shut
down the computer system before the UPS battery power is drained or
data in the buffer may be lost.

If the UPS is connected to the RW504/RW524 optical disk library, the power
requirements shown in Table 2–2 must be met:
Table 2–2 UPS Power Requirements
Volt-Amps

Watts

125 Volt-Amps (typical)

75 Watts (typical)

180 Volt-Amps (maximum)

110 Watts (maximum)

CAUTION
Connecting the UPS to the autochanger incorrectly may not provide full
protection against data loss. To insure proper UPS connection, perform
the following steps:
•

Use the proper cable when connecting a UPS to the autochanger.

•

Run test 75 after connecting the UPS to the autochanger. (See
Section 4.9.2 for instructions for running test 75.)

2.7 Hardware Verification
The Customer Engineer (CE) needs to verify that the optical disk library is
fully functional. To do this, the CE powers up the unit, which will invoke the
poweron diagnostic. After completion of the poweron diagnostic, the CE needs
to execute internal diagnostic tests 2, and 11 through 17 (Section 4.10) and test
the autochanger mechanism and drive(s) to verify that all functions of the optical
library unit (moves, flips, reads, writes, and so forth) are operating correctly.
Refer to the appropriate Setup Guide and host configuration guide to complete
the installation.

Environmental/Installation/PM 2–11

2.8 Moving the RW504/RW524 Optical Disk Library
2.8.1 Moving a Short Distance
To move an RW504/RW524 optical disk library a short distance (down the hallway
or to another floor in the building) perform the following steps. If you want to
ship the disk library, see Section 2.8.2.
1. Unmount (unreserve) any disk surfaces from the host system if necessary.
2. If there is a disk loaded into the drive mechanism, eject the disk from the
drive and return it to its storage slot.
CAUTION
Failure to eject a disk from the optical drive prior to transport could
result in damage to the drive mechanism.
Do not switch off the optical disk library or unplug the AC power cord
until you are sure that the SCSI bus is inactive. Switching off power or
unplugging the power cord when the SCSI bus is active can cause data
loss, indeterminate bus states, or both. (Check the host system reference
manuals for information on checking the status of the SCSI bus.)

Note
Before you move an optical disk library to a new location, make sure that
all environmental requirements listed in Chapter 2 have been met and
that the power outlet has been checked to ensure that the proper voltage
is available for the drive.

3. Switch off the power switch (located on the back panel) and the operation
switch (located on the front panel).
4. Remove the power cord and SCSI cable connections from the disk library.
5. Carefully move the disk library to its new destination.
6. Connect the disk library to the host.
7. Reconnect the power cord.
8. Configure the disk library to the host. (Refer to your host system manual for
configuration information.)

2–12 Environmental/Installation/PM

2.8.2 Shipping the RW504/RW524 Optical Disk Library
If the disk library must be shipped, do the following steps.
1. Unmount (unreserve) any disk surfaces from the host system if necessary.
2. Eject all disks from the autochanger and, if the disks were not labeled with a
storage slot location prior to inserting them into the autochanger, do it now.
CAUTION
Failure to eject all disks from the optical drive and storage slots prior
to transport could result in damage to the drive mechanism, the
autochanger, or both.

3. Run TEST 23 to position the picker for shipping.
a. Press NEXT until TEST * appears, and then press ENTER .
b. Press NEXT until TEST 23 appears, and then press ENTER .
CAUTION
Do not switch off power or unplug the AC power cord from the optical
disk library until you are sure that the SCSI bus is inactive. Switching
off the library or unplugging the power cord when the SCSI bus is active
can cause data loss, indeterminate bus states, or both. (Check the host
system reference manuals for information on checking the status of the
SCSI bus.)

4. Press the operation button (located on the optical disk library front panel) and
the power switch (located on the back panel) so they are both in the ‘‘OFF’’
position.
5. Remove the power cable and SCSI cable connections from the optical disk
library.
6. Lay the disk library on its side and replace the shipping screw (See
Figure 2–4).

Environmental/Installation/PM 2–13

Note
If the shipping screw has been misplaced, you can use a cap screw with
the following specifications:
•

6/32 UNC-2B screw

•

1-3/8 inches long

7. Repackage the autochanger in its original shipping carton and have the unit
shipped in the same manner in which it was received.
Figure 2–4 Replacing the Shipping Screw

Shipping screw
location

MK445−02

2–14 Environmental/Installation/PM

2.9 Preventative Maintenance
There is no preventive maintenance for the optical disk library, however the
optical disks may require cleaning.
Cleaning an optical disk is needed more commonly on standalone drives than
with autochangers because of the differences in their environments and usage.
Although an autochanger may be used in such a way as to make disk cleaning
necessary, it is not recommended.
To determine whether or not disk cleaning is appropriate for your customer’s
situation, refer to Section 4.3, Optical Disk Cleaning.
CAUTION
Do not attempt to clean the optical drive objective lens! Although disk
drive cleaning kits are available, they are not approved for use with the
RW504/RW524 and will damage the optical drive mechanism.

Environmental/Installation/PM 2–15

3
Product Operation and Configuration
3.1 Front Panel/Control Panel Operations
Refer to Figure 3–1 for the location of the front panel controls and features.
Table 3–1 lists and describes the callouts.
Figure 3–1 Front Panel

1 Mailslot

5 9−Character Display

2 Operation Switch
3 Selection Controls
4 Drive Indicator

MK445−03

Product Operation and Configuration 3–1

Table 3–1 Front Panel Controls
Mailslot

Allows you to insert or remove optical disks.

Operation Switch

Applies or removes power to enable or disable
operation of the optical disk library. (This is NOT
the power switch. The power switch is located on the
rear panel.)

Selection Controls

Press these buttons to perform the desired operation.
CANCEL is pressed to cancel the current operation

or choice.

NEXT is pressed to display the current operation
options available such as LOAD, TEST, INFOrmation,
CONFiguration, EJECT, and SCSI ID, or to scroll the
displayed choice forward by one.
PREV is pressed to scroll the displayed choice
backward by one.
ENTER is pressed to choose the displayed selection.

Drive Indicator

Lit when a read, write, erase, or seek operation is
done. It is also lit during power-on self-test.

9-Character Display

Displays information about the current operation.
Generally you press PREV or NEXT to control the
selections. Once your selection is displayed, you press
ENTER . You may press CANCEL to cancel your
selection.

3–2 Product Operation and Configuration

3.2 Rear Panel Features and Controls
Refer to Figure 3–2 for the location of the rear panel controls and features.
Table 3–2 lists and describes each control.
Figure 3–2 Rear Panel

3 Power Switch

4 Voltage Select Switch

1 Power Connector

2 SCSI Connector

MK445−05

Table 3–2 Rear Panel Features and Controls
Power connector

Connection for power cord.

SCSI connectors

Two SCSI bus format connectors that allow SCSI
devices to be daisy-chained. If no other SCSI
device exists after the current device on the chain,
a terminator must be connected to the unused
connector.
(continued on next page)

Product Operation and Configuration 3–3

Table 3–2 (Cont.) Rear Panel Features and Controls

Power switch

Used to switch on or off all power to the optical disk
library. (This switch must be on before the operation
switch on the front panel is functional.)

Voltage select switch

The voltage select switch allows the user to specify
either a 115-volt or a 230-volt setting depending on
the country in which the disk library will be used.

UPS (9-pin, serial)
Connector

Used to connect a communication cable between the
optical disk library and an uninterruptable power
supply (UPS). A UPS insures that data in the buffer
during a write operation will not be lost in the event
of a power failure.

Fuse receptacle

The fuse receptacle holds the fuse and fuseholder cap.

3–4 Product Operation and Configuration

3.3 Setting and Displaying Configurations
3.3.1 Setting a Configuration (CONF)
Follow these steps if you wish to set an autochanger configuration.
1. With READY displayed, press NEXT until CONF * displays.
2. Press ENTER . CONF 0 displays. (The 0 is blinking.)
3. Press NEXT or PREV until CONF ## displays (where ‘‘##’’ is the configuration
number you want to change.)
Refer to Table 3–3 for a complete listing of configurations.
4. Press ENTER .
Some configurations require a security code. If prompted, enter the security
code. (NO CONFIG displays if you entered the wrong code.)
5. Press NEXT or PREV until the value you want appears in the display.
6. Press ENTER once your choice displays. SET displays briefly followed by
CONF *.
7. Press CANCEL twice to return to READY.

3.3.2 Displaying Information Logs (INFO)
1. With READY displayed, press NEXT until INFO * displays.
2. Press ENTER .
3. Press NEXT or PREV until the desired log number displays.
Refer to Section 4.6 for a complete listing of information logs.
4. Press ENTER . The log information displays.
Note
Some logs will display more information when NEXT or PREV is pressed.
Press CANCEL to stop the INFO display. Press NEXT to choose another log.

Product Operation and Configuration 3–5

3.3.3 Choosing Tests and Displaying Results (TEST)

Note
A complete listing of diagnostic tests is given in Section 4.9 and
Section 4.10.

With READY displayed, press NEXT . TEST * displays.
1. Press ENTER . TEST 0 displays.
2. Press NEXT or PREV until the needed test number displays.
3. When you press ENTER for the chosen test, ONCE displays.
You may accept ONCE by pressing ENTER or press NEXT or PREV to choose 10,
100, 1000, or LOOP test repetition times.

LOOP indicates that the test runs continuously until CANCEL is pressed or the
unit is switched off.
Note
All tests except test 39 may be stopped by pressing CANCEL . The current
test iteration completes. To stop test 39, press CANCEL twice.

4. Once you press ENTER for the number of test iterations, RUN ## displays
(where ## is the test number).
5. The test runs. If no problems are encountered, the message PASS ## displays.
You may press CANCEL to get back to the READY state; or, you may press
ENTER to perform another test.
6. If a problem occurs during the test, the message FAIL ## displays. Press
ENTER to gain information about the failure. An ERROR ## displays. Relevant
information is stored in the Autochanger Error Log (Log 0).
Press CANCEL to exit this display.

3–6 Product Operation and Configuration

3.3.4 Setting the SCSI Address

Note
Determine what SCSI device addresses are currently in use on the host
system. You can then correctly determine what available SCSI addresses
to use for the optical drive mechanism and the autochanger controller.

The default address settings are as follows:
•

Autochanger controller - SCSI ID 3

•

Optical drive mechanism - SCSI ID 4

If you want to change either address, follow these steps.
Note
Pressing CANCEL at any time will return you to the READY state or will
take you back one step each time it is pressed.

1. With READY displayed, press NEXT until SCSI ID * displays.
2. Press ENTER . AC ID 3 displays.
This is the autochanger controller address. If you want to change this
address, press ENTER , otherwise press NEXT to display DRV ID 4 and then
press ENTER .
3. Press NEXT or PREV until the address you want is displayed.
4. Press ENTER . The address you chose is now set.
5. Press NEXT until either UPDATE or CONFLICT displays.
If CONFLICT displays, the drive and controller have been set to the same
address and one of them must be reset.
If UPDATE displays and you are satisfied with the addresses you have selected,
press ENTER ]].
6. Record the new address setting(s) for future reference.

Product Operation and Configuration 3–7

3.3.5 Securing the Optical Disk Library
In its default condition, the optical disk library is unsecured. Any user can insert
or remove disks or access control panel displays, configurations, or tests. In an
open environment, some precautions should be taken to secure access to the
control panel as well as to the following:
•

Sensitive data stored on optical disk surfaces

•

Configuration settings

•

Diagnostic log information

If the customer is concerned about security, the following procedures might be
considered:
•

Setting a new disk library security code periodically and limiting the number
of people who know the security code

•

Implementing security configurations 15 and 20 which restrict disk insertion
and removal. This is also done through OSMS software

•

Locating the disk library in a physically secure environment

3.3.6 Setting a New Security Code

Note
This procedure is explained in the Optical Library User’s Guide
(EK–STSOP–UG). It is presented here as information to service personnel
in case the customer prefers this level of guidance while setting up the
disk library.

Note
A security code of 0-0-0 was set at the factory. Digital recommends that
the customer change the security code so that only authorized persons
can access the optical disk library. Otherwise, anyone can insert and eject
disks, and change operation settings on the optical disk library.
When setting a new security code, the old code (or default code, 0-0-0, if
none has been set) must be keyed in first and then key in the new code.
The customer should key in both the old security code and the new code
during this procedure.

3–8 Product Operation and Configuration

1. With READY displayed, press NEXT until CONF * displays.
2. Press ENTER . CONF 0 appears in the display window (0 is flashing).
3. Press NEXT until CONF 17 is displayed.
You are now prompted to enter the old or default security code.
4. Press ENTER . CODE1 and a flashing 0 is displayed.
5. Press NEXT until the first number of the old or default (0) security code is
displayed.
6. Press ENTER . CODE2 and a flashing 0 is displayed.
7. Press NEXT until the second number of the old or default (0) security code is
displayed.
8. Press ENTER . CODE3 and a flashing 0 is displayed.
9. Press NEXT until the third number of the old or default (0) security code is
displayed.
10. Press ENTER . SET is displayed if you entered the old number correctly.

NO CONFIG is displayed briefly and then CONF 17 is displayed if a mistake was
made in keying in the old security code. Follow steps 4 through 9 again.
Note
It is a good idea for the customer to write down the new security code
prior to entering it into the disk library.

Follow these steps to enter the new security code:
1. Press ENTER . NEW1 and a flashing 0 is displayed.
2. Press NEXT to choose the first number of the new security code.
3. Press ENTER . NEW2 and a flashing 0 is displayed.
4. Press NEXT to choose the second number of the new security code.
5. Press ENTER . NEW3 and a flashing 0 is displayed.
6. Press NEXT to choose the third number of the new security code.
7. Press ENTER . SET 17 is displayed.

Product Operation and Configuration 3–9

3.3.7 Restricting Disk Insertion and Removal
Configurations 15 and 20 act together to control disks during normal and power
fail conditions.
•

CONF 15 - when this is set to ON, you cannot insert or remove disks without a
security code.

•

CONF 20 - when this is set to ON, the CONF 15 status is maintained when
a power fail occurs. Also, the reserved status on mounted surfaces is
maintained if the autochanger power fails.

When setting CONF 15 or CONF 20, the display prompts you for a security code.
This security code is 0-0-0 (default) or the one set by the customer using CONF 17.
3.3.7.1 Setting CONF 15 or CONF 20
1. Press NEXT until CONF * displays, and then press ENTER .
2. Press NEXT or PREV until CONF 15 or CONF 20 displays.
3. Press ENTER . CODE1 and a flashing 0 displays.
4. Press NEXT or PREV until the first security code number displays.
5. Press ENTER . CODE2 and a flashing 0 displays.
6. Press NEXT or PREV until the second security code number displays.
7. Press ENTER . CODE3 and a flashing 0 displays.
8. Press NEXT or PREV until the third security code number displays.
9. Press ENTER .
10. Press NEXT or PREV to select ON or OFF.
11. Press ENTER . SET 15 or SET 20 displays.

3–10 Product Operation and Configuration

3.3.8 Controlling Mailslot Rotation
Configurations 31 and 32 allow control of mailslot rotation as described below.
(See Section 3.3.1)
Note
In its default state, the optical disk library’s mailslot stays open, ready to
accept an optical disk.
The following configurations allow control over the mailslot’s position.

•

CONF 31 - when this is set to ON and CONF 15 is also set to ON, the mailslot’s
default position is closed. The mailslot cannot be opened and disks cannot
be inserted or removed until CONF 15, (requires a security code to set), is set
to OFF. Setting this configuration to ON makes it visible to the user that the
mailslot cannot be used until security configuration 15 is switched OFF.
If the autochanger is full, the mailslot will only open for an eject command.

•

CONF 32 - when this is set to ON, the mailslot can be rotated open or closed
from the control panel or it allows the host to control mailslot rotation using
a SCSI Rotate Mailslot command. Pressing NEXT on the disk library’s control
panel displays an OPEN MS or CLOSE MS message. When the open or close
message displays, press ENTER to toggle the mailslot open or closed.
If the autochanger is full, the OPEN/CLOSE MS is not displayed and the mailslot
will only open for an eject command.

3.3.9 Host Configuration
Once the disk library is connected to the host system and the device address is
set, you are ready to prepare the host system to access the library. To determine
if the host you are connecting to supports the optical disk library and for further
installation information, check the following documents:
•

Product support plan (available from your local Sales Support Office)

•

Host system documentation.

Product Operation and Configuration 3–11

3.4 Autochanger Configuration Choices
The following table lists the available configurations choices. An explanation of
how to access and set these configurations is found in ‘‘Setting a Configuration’’
in Section 3.3.1.
Table 3–3 Autochanger Configuration Choices
No.

Function

Default

Options

Clear/Save Error Log
(Information Log 0)

Save

Clear - clears the error log
immediately.
Save - saves the error log until
Clear is con figured.

No Break on Failure

Off

Off - if a test encounters a failure,
the test stops.
On - if a test encounters a failure,
the test continues.

Clear/Save Move Log
(Information Log 10)

Save

Clear - clears the move log
immediately.
Save - saves the move log until
Clear is configured.

Clear/Save Runtime Log
(Information Log 11)

Save

Clear - clears the runtime log
immediately.
Save - saves the runtime log until
clear is configured.

Configurations 15 - 20 require
a security code.
15

Prevent Media Removal
(security code required)

Off

On = No mailslot I/O
Off = Normal mailslot I/O

Set Default Configurations
(security code required)

Save

Clear - restores default configurations immediately.
Save - maintains all set configurations.

Set New Security Code
(security code required)

0-0-0

Clear/Save Logs
(security code required)

Save

Clear - clears/zeros the specified
logs.
(continued on next page)

3–12 Product Operation and Configuration

Table 3–3 (Cont.) Autochanger Configuration Choices
No.

Function

Default

Options
Save - maintains the specified logs
until clear is configured.

Clears/zeros these logs:
#4 - Drive Load Count
#5 - Poweron Hours
#9 - Move
#12 - Flip
#14 - Mailslot Rotation

Sets the number of attempts to
retry moves before giving up.

Set Autochanger Retries
A - Max. attempts to find home
B - Max. attempts to do move
C - Max. attempts to restore
move after failure.

Poweron Cartridge Security
(security code required)

Off

On - maintains the status of
configuration 15 upon power cycle
or power failure.
Off - Configuration 15 is not
maintained through a power cycle
or power failure.

Enable Autochanger Retries

On - Autochanger attempts to
correct itself when it encounters
difficulty.
Off - Autochanger does not attempt
to correct itself when it encounters
difficulty.

Clear Drive 1 Load Count Log
(Information Log 4)

Save

Clear - clears the Drive 1 Load
Count Log immediately.
Save - saves the Drive 1 Load
Count Log until clear is configured.

Report Recovered Error

Off

On - reports the SCSI-level error to
the host.
Off - no reports of SCSI-level errors
to the host.

4
2
1

(continued on next page)

Product Operation and Configuration 3–13

Table 3–3 (Cont.) Autochanger Configuration Choices
No.

Function

Default

Options

Secured Mailslot Rotation
(security code required)

Off

Off - Normal mailslot operation.
On - The mailslot rotates in when
configuration 15 is set to ON or a
Prevent Media Removal command
is received. The mailslot remains
closed until configuration 15 is
set to OFF or an Allow Media
Removal command is received.
If the autochanger is full, the
mailslot will open only for an
EJECT command.

Mailslot Rotation Command
(security code required)

Off

Off - Normal mailslot operation. If
the host sends a Rotate mailslot
command and config. 32 is set to
off, the host will receive a Check
Condition followed by a Sense Key
of Illegal Request.
On - When a Rotate Mailslot
command is received (either from
the host or via the control panel),
the mailslot is toggled open or
closed.

DEC/OEM Mode

Off

Off - Changes inquiry mode to DEC
mode. Required when connected
to a DEC computer to ensure
integrity. This changes default of
Autocontroller PCA.
ON - For use with OEM computers
(HP).

DEC/OEM Mode

Off

Off - Changes inquiry mode to DEC
mode. Required when connected to
a DEC computer to ensure integrity.
This changes default of 1.3 Gbyte
multifunction drive only.
ON - For use with OEM computers
(HP).
(continued on next page)

3–14 Product Operation and Configuration

Table 3–3 (Cont.) Autochanger Configuration Choices
No.

Function

Default

Options

Zero all RAM

Save

Save - RAM remains unchanged.
Clear - Zeros all RAM locations and
reboots.
Caution - When this configuration
is set to ’’Clear,’’ the product ID
and the vendor ID are cleared. DO
NOT perform this configuration
operation.

Product Operation and Configuration 3–15

4
Troubleshooting and Diagnostics
This chapter is divided into the following sections:
•

Operation/Installation Error Information
Lists common problems encountered during operation and installation of
the optical disk library, and gives suggestions for solving these problems.
(top-level troubleshooting)

•

Control Panel Error Information
Provides error messages and log information which are available through
the control panel display. This level of troubleshooting is used when ‘‘hard’’
(repeatable) errors are encountered. (intermediate-level troubleshooting)

•

Error Information through SCSI Commands
Error messages and log information available by issuing SCSI commands
via an external PC-based host computer. This level of troubleshooting is
used when ‘‘soft’’ (intermittent) errors are encountered. (in-depth level
troubleshooting)

•

Internal Diagnostic Utilities
Information about the available internal diagnostics used to aid in the
troubleshooting process.

Troubleshooting and Diagnostics 4–1

4.1 Operation/Installation Error Information
Table 4–1 lists problems that may occur during operation of the optical disk
library. If you cannot find a solution to a problem in this section, go to Section 4.5
for more in-depth troubleshooting.
CAUTION
DO NOT CYCLE POWER during any troubleshooting until you are sure
the system SCSI bus is INACTIVE and will REMAIN INACTIVE.
Removing power while the bus is active can cause data loss and/or
indeterminate bus states. Check the host system reference manuals for
information on checking the status of the SCSI bus.

Table 4–1 Operation/Installation Troubleshooting
Task

Problem/Symptom

What to do

Communicating
host to library

Can’t get the host to
recognize the optical
disk library.

Check to make sure the disk library is
supported on the host operating system.
Check to make sure the autochanger was
installed and configured as described in
the user’s guide and the appropriate host
system manuals.
Check the SCSI connections.
Check the SCSI interface address as it
relates to the device files.
Make sure SCSI IDs of Jukebox and MF
drives do not conflict with other SCSI
devices on the bus. Section 3.3.4
Make sure software license was correctly
installed.
Make sure CONFIG 40 is set to DEC mode.
Reference Section 3.3 and Table 3–3
(continued on next page)

4–2 Troubleshooting and Diagnostics

Table 4–1 (Cont.) Operation/Installation Troubleshooting
Task

Problem/Symptom

What to do

Changing the
drive address

Changed drive address
but new address is not
recognized.

After changing an address, the autochanger
power and/or the host system power may
need to be cycled for the new address to
be recognized. (Refer to the host system
documentation for information on setting
peripheral addresses and shutting down
the host system.)

Inputting
Security Code

Security code forgotten
or misplaced for the
autochanger.

First, try the default security code (0-00). If the security code is not set to the
default, locate the 8-switch dip switch
on the controller PCA (See Figure 5–3),
and set switch 1 to the ‘‘closed’’ position.
Switch on the autochanger. This clears
NVRAM and sets the security code to the
default code. NOTE: Once this has been
done, the switches must be reset to their
original settings in order for NVRAM to
be maintained the next time power is
switched off. The customer may now use
configuration 17 to set a new security code.
(See Section 3.3.6)

Loading Disks

Disk inserted in
mailslot, but the display
reads ERROR, EMPTY, or
MISLOAD.

Remove the disk from the mailslot and
try inserting it again. Push the disk in,
shutter-end first, so that the disk is flush
with the optical disk library front panel.

Powering on

The optical disk library
won’t power on.

Check to make sure the power cord
connections are tight.
Check to see that both the back power
switch and the front operation switch are
in the ON position.
Check to make sure the power outlet is
operating.
Check the voltage select switch setting.
Replace the fuse with a new one.
Replace the power cord with a known good
one.
Replace the power supply module.
(continued on next page)

Troubleshooting and Diagnostics 4–3

Table 4–1 (Cont.) Operation/Installation Troubleshooting
Task

Power fail

Problem/Symptom

What to do

Power-on self-test fails.

Turn the unit off, then turn it on again.
Observe the power-on test result. If the
unit continues to fail, use the error code
to begin troubleshooting. (See Section 4.2
following this table.)

Does not boot correctly.

Make sure the boot disk is ON, spun up,
and ready before applying power to the host
computer. The autochanger and the host
may then be powered on in any order.

Just the autochanger
power fails.

When power returns, unmount and
remount all disk surfaces. Do not eject
any disks until the surfaces are unmounted
/unreserved.

Autochanger power fails
while a disk is in the
drive.

If you need to remove the disk before power
can be resupplied to the drive, the eject tool
can be used to recover the disk. See
Section 4.4 for instructions for using the
eject tool.

Host computer
power fails and the
autochanger stays on.

After the host reboots, file system check
any write-mounted surfaces.

Both the host system
and autochanger power
fail.

After the host reboots, file system check
any write-mounted surfaces.

CAUTION
Do not eject disks from the autochanger until all
mounted surfaces are unmounted.
To prevent disks from being removed after a power
failure, set configuration 20 (Power-on Cartridge
Security) to ‘‘ON.’’ See Section 3.3.7 and Section 3.3.1
for an explanation of configuration 20 and how it is set.
(continued on next page)

4–4 Troubleshooting and Diagnostics

Table 4–1 (Cont.) Operation/Installation Troubleshooting
Task

Problem/Symptom

What to do

Reading the
Front Panel
Display Window

No display messages
appear.

Make sure both the power switch (on the
rear panel) and the operation switch (on
the front panel) are switched on.
Check that the power cord is connected.
Check AC input.
Check the fuse.
Check the control panel cable connections.
Replace the control panel PCA.
Replace the autochanger controller PCA.
Replace the power supply.

Reading/writing
magneto-optical
disks

Can’t write to the disk.

Check the file system access permissions.
Check the write-protect tab on each disk
side to assure write-enabled status.
Check to make sure the disk was
initialized.
Check that the disk file system was
mounted correctly.
Check your application software.

Removing disks

Disk removal attempted,
but the storage slot
or drive location won’t
display the option.

Make sure the optical disk surface’s file
systems have been unmounted.

Disk removal attempted,
but a FULL or MISLOAD
message displays.

Remove the disk from the mailslot and try
to remove the desired disk again.
(continued on next page)

Troubleshooting and Diagnostics 4–5

Table 4–1 (Cont.) Operation/Installation Troubleshooting
Task

Problem/Symptom

What to do

The unit’s power failed
while a disk was in the
drive.

Try powering on the unit. If successful, use
the file system check command.
If power-on is unsuccessful, power the unit
off. Do not move the unit. Moving the unit
with a disk in the drive risks damaging
the magneto-optical mechanism in the MO
drive. Refer to the ‘‘Powering On’’ and
‘‘Power Fail’’ sections earlier in this table.
If it is critical that the disk be removed
from the drive before power can be restored
to the drive, see Section 4.4.

4.2 Power-on Self-tests
CAUTION
When the optical disk library is powered on and the self-test is run,
the SCSI interface and the terminator must both be either connected or
disconnected.
If the controller senses that the optical drive is not connected to a host
system via the SCSI interface, additional self-tests are run on the SCSI
circuitry. If these tests run while a terminator is attached, voltage levels
at the SCSI bus connector are different than expected and a self-test
failure results.

CAUTION
Do not switch off any peripheral on the SCSI bus without first checking
that the bus is not active.
Switching off can cause data loss and/or indeterminate bus states.

To run the power-on self-test, do the following steps:
1. Insert a formatted disk into the drive either from a storage slot location or
through the mailslot/control panel.
2. Remove power from the optical disk library. Press both the power switch on
the back panel and the operation switch on the front panel.

4–6 Troubleshooting and Diagnostics

3. Remove the disk library top cover.
a. Remove the four T-20 screws on the back cover.
b. Slide the top cover towards the back of the unit to free the four tabs from
the sides of the autochanger chassis, and then pull the sides of the top
cover out slightly while lifting the cover off.
4. Remove the right side panel. (This will allow you to observe the LEDs on the
front of the optical drive mechanism.)
a. Remove the four T-15 screws at the back end of the side panel.
b. Slide the panel towards the back of the autochanger until the panel can
be lifted off.
5. Switch on both the rear panel power switch and the front panel operation
switch, and wait for the power-on self-test to complete.
If the power-on self-test completes successfully, both LEDs will turn off. If
power-on self-test fails, the fault LED will remain lit.

4.3 Optical Disk Cleaning
Note
Cleaning an optical disk is needed more commonly on standalone drives
than with autochangers because of the differences in their environments
and usage. While the following information is therefore more applicable
to standalone drives, an autochanger may be used in such a way as to
make the following cleaning information apply. Disk cleaning for libraries
in general, however, is NOT RECOMMENDED as a normal user task.

Disk cleaning should only be done after a read/write failure or if a customer
notices a loss of autochanger performance. In addition, it must be determined
that the failure or loss of performance was not caused by a definite hardware
failure.
A failure to read a disk may result from:
•

Hardware failure

•

Contamination of the disk surface

Troubleshooting and Diagnostics 4–7

•

Contamination of the drive objective lens

On an otherwise working drive, check to see that the most current firmware code
level is being used and/or that all applicable service notes have been done. If so,
contamination could be a cause and cleaning may be necessary.
In the case of a read failure, cleaning might be the only way to get the customer’s
data back. In the case of performance loss, a few minutes spent cleaning may
prevent unnecessary replacement of service parts and present an opportunity to
‘‘fix the site’’ and help the customer prevent contamination in the future.
The following are recommendations for preventing contamination of disks and the
disk drive:
•

Place the library away from high traffic areas.

•

Do not leave a disk in the drive for extended periods of time if possible.

•

Do not use the library in ‘‘dirty’’ environments such as coal mines, railroad
maintenance yards, etc.

4.3.1 Cleaning Tools Available
Disks may be cleaned with the Optical Disk Cleaning Kit (see Appendix B for
ordering information). This kit contains swabs and alcohol, cleaning instructions,
and a special cartridge holder that keeps the sliding sleeve open.
Note
If the problem appeared as loss of performance and cleaning a disk solved
the problem, another couple of steps must be done to regain performance
using that disk.
As performance was declining because of read/write problems, the disk
was probably becoming fragmented through excessive ‘‘sparing.’’ To regain
performance, the data on each side of the disk should be stored, each side
of the disk reformatted, and the data restored back on the disk.

CAUTION
Do not attempt to clean the optical drive objective lens!
Although disk drive cleaning kits are available, they cannot be used with
RW504/RW524. Damage to the optical drive mechanism could result if
unapproved cleaning kits are used.

4–8 Troubleshooting and Diagnostics

4.4 Using the Eject Tool to Remove a Disk from the
Drive
The optical drive mechanism does not automatically eject a disk from the drive if
a power failure occurs. If you need to manually remove a disk from a drive with
no power, you must use the eject tool.
If you do not have an eject tool for the RW504/RW524 optical drive, you may
order one of these (refer to Appendix B for ordering information). You may also
use a small flat-head screwdriver with the following dimensions:
Length

50 mm

Width

2.45 mm

Thickness

.5 mm

A disk can be removed from the drive while the drive is still secured in the
autochanger. Follow the service access procedures in Chapter 5 to access the
front of the drive mechanism, and then perform the following steps to remove a
disk from the drive:
1. Disconnect all power to the drive if you have not done so already.
2. Insert the eject tool into the small round hole in the front panel of the drive.
3. Turn the eject tool in a clockwise direction (approximately 20 complete
rotations) until the disk is ejected through the front of the drive.
CAUTION
Do not reach into the drive to get the disk. Wait until the disk is ejected
through the front of the drive before removing it. Premature removal of
the disk could damage the drive.

Troubleshooting and Diagnostics 4–9

4.5 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 execiser tests. The approach usually
depends on whether the error encountered was a hard error or whether it was a
soft (intermittent) error.
•

Troubleshooting Using the Control Panel and Observation - This method is
usually used in situations where you have a hard error.

•

Troubleshooting Through the SCSI Bus - This method is used in situations
where you have a soft (intermittent) error.

Error information and logs accessed through the control panel are summarized.
By knowing how the autochanger operates and using the summarized information
from the control panel display, there is enough information to troubleshoot many
problems that result in a hard error.
Figure 4–1 Information and Tests Through the Control Panel

4–10 Troubleshooting and Diagnostics

4.5.1 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 that may have been at fault is returned.
Keep in mind that these FRUs are not listed in any prioritized manner. You
should visually inspect to determine the most likely candidate.
Figure 4–2 The Autochanger Returns Suspect FRUs

Note
This test sequence returns possible failed FRUs only if there has been
a HARD FAILURE. The test sequence will NOT find an intermittent
failure. This test sequence, called the ‘‘FRU Isolation Test’’ (test 60), can
also be run from the control panel. Similar to its automatic operation,
this test sequence only points out (‘‘isolates’’) FRUs if there has been a
hard failure.
What the Autochanger Assumes –
The FRU Isolation Test assumes the following:
•

There was a failure.

•

The cause of the failure was physical (either mechanical or in the electronics).

Troubleshooting and Diagnostics 4–11

•

There is only one failed component. Simultaneous failures of unrelated items
are not considered possible for purposes of this test.

•

Service will be done, if necessary, if a problem is found (i.e., the unit does not
have to be left in a ‘‘clean’’ state).
The test takes advantage of this and does whatever is necessary to determine
the cause of the failure. Disks are not intentionally rearranged, but if the
picker starts this test with a disk in it, the position and orientation of that
disk is unknown.

When an error occurs, the cause may be the power supply, cables, drive
electronics, motors, encoders, belts, gears, sensors, or picker. No assumption
is made about the integrity of any of these components. To isolate the actual
cause of the failure, a process of elimination is used.
The components are tested in a sequence that starts with the most basic functions
and builds to the more complex, and interrelating components (i.e., the motors
cannot be tested if the power supply is dead).
Whenever the initialization sequence is run, FIND HOME is attempted. If the
‘‘home’’ position cannot be found, the FRU isolation test is run automatically.
When the FRU isolation test is run from the control panel, the FIND HOME
sequence is run.

4.5.2 How to Use the Results of the Internal Tests
Similar to treating symptoms rather than the real problem, the suspect FRUs
given by the FRU isolation test may actually mask the root cause of the problem.
The hard move error that caused the autochanger to run the FRU isolation test
may have only been a PRODUCT of the actual problem. Blindly and repeatedly
replacing the suspect FRU(s) will not solve the problem.

4–12 Troubleshooting and Diagnostics

Figure 4–3 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.
A good visual inspection requires an understanding of how the autochanger acts
under normal operation. This understanding can be achieved by completing the
self-paced training for the autochanger and getting as much hands-on experience
as possible. If you are familiar with the moves of the carriage/picker assembly
during the FIND HOME sequence and you are familiar with the behavior of the
drive, you will be able to more easily detect the real problem pointed to by a
suspect FRU.
Note
The specific steps of the FIND HOME sequence and the possible errors
which may result are listed in Section 4.11, The FIND HOME Sequence
and Information Logs.

An example:
Say the autochanger fails with an error code of 4D (hexadecimal), ‘‘MOTION
ERROR CHECKING FOR CARTRIDGE IN THE PICKER,’’ and lists the picker
(FRU 27) as the most likely failure. However, when you observe the unit while
running the ‘‘Wellness Test’’ (test 2), you see that the picker is having trouble
flipping. As you manually move the carriage/picker assembly around and touch
the components that are involved, you notice that the picker belt is abnormally
tight. The belt is tight because the picker motor is skewed.
Troubleshooting and Diagnostics 4–13

The error (4D) and suspect FRU gave an AREA to look at when troubleshooting.
Visual inspection (concurrent with physical checks) helps to link the suspect FRU
with the root cause by providing an area to examine. In the preceding example,
the components that INTERACT with, and DRIVE the picker are examined.
Table 4–3 lists each error code and procedure for finding the cause of the error,
using the autochanger’s suspect FRUs as a guide. Error codes and recovery
procedures are grouped by functional area in the autochanger.
At the BEGINNING of the list of errors for each functional group, you will find
general HINTS about what areas should be checked when errors appear in that
group. Be sure to check out those hints.

4.5.3 The FRU Isolation Test Sequence
The following list traces the execution of the FRU isolation test. A failure
requires additional tests at that point to determine the actual cause. The original
sequence is not continued if a test fails.
1. Look at the error code generated by the FIND HOME sequence. Some codes
may have obvious, implied FRUs. (eliminates optical sensors and their cables)
2. Run autochanger controller PCA tests that do not cause host communication
loss. (eliminates power supply, power supply cables, ROMs, RAM, motor
control IC, and microprocessor)
3. Check that the motors are capable of moving by attempting to move them
very small distances in both directions. (eliminates motor assemblies (except
belts), motor cables, PCA drivers)
4. Pull picker fingers back. They should come to a hard stop with the leadscrew
nut completely at the end of the leadscrew. (eliminates the picker belt)
5. Move carriage/picker assembly toward the drive. It should come to a hard
stop. (eliminates the carriage belt)
6. Move carriage/picker assembly away from the drive. The move has to be
far enough to be certain that the leadscrew can move, but not so far that
a jammed cartridge will cause the test to fail. (eliminates the carriage
leadscrew assembly)
If the FRU isolation test has been run from the front panel, the FIND
HOME sequence will automatically be executed at this point.
7. At this point, there is some level of confidence that the system is capable of
moving the carriage/picker assembly. Using the new information learned by
running these tests, look at the error codes, the move ID that failed, and how
the recovery system failed.

4–14 Troubleshooting and Diagnostics

4.6 Information Logs
The optical autochanger control panel diagnostic tests have two major purposes.
The first is to provide diagnostic information that can lead to early detection of
an autochanger problem. The second is to provide fault isolation tests.
All the logs are maintained within non-volatile RAM, and so are not affected by
cycling autochanger power. These logs are accessible from the control panel by
using the INFO option.
Procedure
To display information about the autochanger (e.g., the error log or move success
log) access the INFO option using the following steps.
1. With the autochanger power on and in the READY state, press NEXT . TEST *
displays.
2. Press NEXT until INFO * displays.
3. Press ENTER .
4. Press NEXT or PREV until the desired log number is displayed.
5. Press ENTER . The log information will be displayed.
Note
Some logs will display more information when NEXT or PREV is pressed.
Press CANCEL to stop the INFO display. Press ENTER to choose another
log.

You have several information selections that are outlined in Section 4.6.
The logs listed in Table 4–2 are accessible from the control panel by using the

INFO option.

Troubleshooting and Diagnostics 4–15

Table 4–2 Information Logs (INFO Logs)
No.

Log Name

Description

Autochanger Error
Log

The autochanger maintains a time-stamped history of
past diagnostic test errors that have occurred within the
autochanger. The error message maintained for each error
indicates the failure and the possible Field Replaceable
Units (FRUs) that may have caused the failure.
Displays as follows:
Err n y - nth error; actual error code
FRU A - suspect FRU #1
FRU B - suspect FRU #2
FRU C - suspect FRU #3
Test n - test that failed
abcdefgh - time stamp

Firmware Version
Number

Displays the current autochanger firmware version
number.

Element Status

Displays the status (empty or full) of the selected
autochanger element.
Displays three numbers:
First Number = Element number
0 = picker
1 = drive
10 = mailslot
11 - 26 = storage slots
Second Number = Element type
1 = picker
2 = storage slot
3 = mailslot
4 = drive
Third Number = Data mask
00 = empty
01 = full

Software Clock

Displays the current ‘‘count’’ in seconds of the software
clock. (hexadecimal)

Drive Load Count

Displays the number of cartridge loads into the drive.
(continued on next page)

4–16 Troubleshooting and Diagnostics

Table 4–2 (Cont.) Information Logs (INFO Logs)
No.

Log Name

Description

Poweron Hours

Displays the number of hours the unit has been powered
on.

The term Move
used in Logs 6 - 10
means SCSI-level
moves by the picker
mechanism.
6

Current Move
Success Count

Displays the number of successful moves since the most
recent autochanger failure.

Move Success
Average

Displays the average of the values in Log 10 - Move
Success Log.

Current Move
Retry Count

Displays the number of move retries done since the most
recent autochanger failure.

Total Move Count

Displays the total number of moves and move attempts.

Move Success Log

Contains the number of successful moves that have
occurred without a failure. Each time a failure occurs,
the number of good moves is entered into the log and a
new count is started. This INFO display shows the most
recent 10 (or less) entries in the log. This log also shows
the retry counts corresponding to each log entry.
Example (2 displays for each entity):
1

33482
3

First display: 1 = entry number and
33482 = number of moves
Second display: 3 = number of retries
11

Display Runtime
Log

Flashes to each display until CANCEL is pressed.
A - Moves done
B - Retries
C - Automatic recoveries
D - Hard errors

Display Flip Count

Displays total number of picker flips.

Display Translate
Count

Displays total number of picker translates. For this unit,
the Translate Count will always be 0
(continued on next page)

Troubleshooting and Diagnostics 4–17

Table 4–2 (Cont.) Information Logs (INFO Logs)
No.

Log Name

Description

Display Mailslot
Rotation Count

Displays total number of mailslot rotations.

Number of Drives

Displays the number of disk drives in the unit.

Drive #1 SCSI
Address

Displays drive’s SCSI address. (This will always return a
‘‘1’’.)

Drive #2 SCSI
Address

Will return a ‘‘1’’ (same information as log 16) since
RW504/RW524 only has one drive.

Sensor Height

Displays the measured height of the picker sensor.
(hexadecimal)

Picker Cone Angle

Displays the measured picker cone angle from the nominal
position. (hexadecimal)
The cone angle is the sum of the upward droop on one side
of the picker plus the downward droop on the other side of
the picker.

Stack Tilt

Displays the measured stack tilt of the box. (hexadecimal)
The height of each side of the autochanger, or ‘‘stack’’, is
the height of each of the two sensors. Tilt is the measure
of the difference of the heights of the sides.

23 39

Minimum
Clearance

Minimum clearance for cartidge insertion into a magazine
or storage slot. Up/down clearance is as calculated
by Test 65 and Test 67. Up clearance/down clearance
(hexadecimal)
Example:

00DC 0028 = 220, 40
FFEC 0014 = -20, 20
23

Mailslot

Storage slot 1

Storage slot 2

Storage slot 3

Storage slot 4

Storage slot 5

Storage slot 6

Storage slot 7
(continued on next page)

4–18 Troubleshooting and Diagnostics

Table 4–2 (Cont.) Information Logs (INFO Logs)
No.

Log Name

Storage slot 8

Storage slot 9

Storage slot 10

Storage slot 11

Storage slot 12

Storage slot 13

Storage slot 14

Storage slot 15

Storage slot 16

Description

Troubleshooting and Diagnostics 4–19

4.7 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, FAIL 1 is displayed. If the
failure occurs at some other time, MISLOAD or FAIL 0 is displayed. If a failure
occurs while you are running a test, FAIL # is displayed, where # is the number of
the test that failed.
When you press ENTER , the autochanger displays information about the
hardware failure.
The autochanger firmware can detect broken components such as a dead motor,
a missing belt, etc., but if failures are due to marginal or random problems, the
failing component may induce errors in other components. For example, if any
portion of the electronics becomes intermittent or if friction increases on a part,
different components of the autochanger may appear to fail at varied points as
the autochanger runs its code. This results in many different error codes.
Note
Instructions for running internal diagnostic tests are given in Section 4.9.
A list of the available test choices and their descriptions are given in
Section 4.10.

4.7.1 Hardware Error Codes and Recovery Procedures
Table 4–3 shows the hardware error codes possible and recovery procedures for
specific hardware errors.
In all cases, if you run a test and no error occurs, monitor for reoccurrence. If the
error repeats, use the list of FRUs logged by the FRU isolation test as a guide to
determine the problem. Replace the FRU(s) as necessary.

4–20 Troubleshooting and Diagnostics

Table 4–3 Recovery Procedures for Specific Hardware Errors
Error Code
(hex.)

Error

Recovery Procedures

No error

No action.

AUTOCHANGER CONTROLLER PCA ERRORS
The first step is to make sure all cables
are fully inserted into the connectors
on the controller pca.
01

ROM Checksum Error

Run test 31—ROM Checksum Test – verify
failure.

RAM Test Error

Run test 33—RAM Test—verify failure.

Microprocessor Test
Error

Run test 30 – Microprocessor Operation
Test—verify failure.

Controlled Area of RAM
Checksum Error

Recycle Power—verify failure.

Illegal interrupt seen by
microprocessor

Same as for error code 05

Illegal CPU exception
seen by microprocessor

Same as for error code 05

Firmware Error

Run test 3—Controller Test—(may not be
able to duplicate).

If error repeats –
Run configuration 16—resets default
values. Recycle power.
If error repeats –
Clear NVRAM by switching off power and
setting switch 1 on the 8-switch rocker
switch located on the controller PCA to the
‘‘closed’’ position and switching the power
back on. Clearing NVRAM sets the security
code back to the default (0-0-0).
If error repeats –
Replace autochanger controller PCA (FRU
01). Power-on—check fix.

SCSI INTERFACE-SPECIFIC ERRORS
Visual inspection is not possible for
errors 0B to 13.
0B

SCSI Controller Register
Error

Run test 34—SCSI Interface Controller
Chip Test—verify failure.
(continued on next page)

Troubleshooting and Diagnostics 4–21

Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors
Error Code
(hex.)

Error

Recovery Procedures

SCSI Controller IC’s
RAM Failed