Preface

The Desktop Storage Module Service Manual describes how to troubleshoot and run diagnostic software and how to remove and replace defective components. Appendix B lists all replaceable parts.

Who Should Read This Book

This book is written for Sun field service representatives, original equipment manufacturers (OEMs), value-added resellers (VARs), and customers with self- maintenance contracts.

What This Book Contains

This book contains the following information:

• Hardware Overview - Chapter 1

This chapter presents an overview of the Desktop Storage Module (DSM), and shows the illustrations of the DSM. Read this chapter to gain a general familiarity with the hardware.

• Diagnostics Overview - Chapter 2

This chapter describes some of the diagnostic software applicable to the DSM.

• Troubleshooting - Chapter 3

This chapter gives the basic steps to diagnose a problem with a DSM.

• Preparing the System - Chapter 4

This chapter explains steps to perform before replacing any hardware. Read this chapter before replacing any hardware.

• Disk Drive - Chapter 5

This chapter describes how to remove and replace a disk drive.

• Tape Drive - Chapter 6

This chapter describes how to remove and replace a tape drive.

• Power Supply - Chapter 7

This chapter explains how to remove and replace a power supply.

• I/O Bracket Assembly - Chapter 8

This chapter describes how to remove and replace an I/O bracket assembly.

• LED Harness Assembly - Chapter 9

This chapter explains how to remove and replace the LED harness assembly for a DSM with a disk drive only.

• Powering Up the System - Chapter 10

This chapter describes steps to perform after replacing hardware.

• Hardware Specifications - Appendix A

This appendix describes the physical specifications, power input requirements, and environmental requirements.

• Replacement Parts List - Appendix B

This appendix contains the replacement parts list for the Desktop Storage Module .

• Glossary

The glossary defines technical terms, abbreviations, and acronyms.

Before Reading This Book

Before reading this book, you should have installed the hardware. If you are connecting to a network, you should also be proficient with system administration and networking procedures. If you are not proficient in these areas, please read the following books before attempting to repair your system:

• Desktop Storage Module Installation Guide

• Sun System & Network Manager's Guide

Typographic Conventions

This book uses a number of typographic conventions:

• This font is used for emphasis and for a book title. For example:

When you press the switch, the power goes on.

Desktop Storage Module Installation Guide

• This font indicates text the system displays on the screen. This font also indicates characters and words you enter (as shown within text). Examples follow:

Syncing file systems... done

Enter passwd.

• This font indicates what you type as illustrated in screen examples.
  For example:

• This font also indicates a key that you press. For example:

Press the Delete key.

• When you see two key names separated by a hyphen (-), press and hold the first key, then press the second key. For example:

To press L1-A, press and hold L1, while typing A.

• The term "enter" means to type the command indicated and press the Return key. For example, "enter sync" means to type the sync command and press the Return key.

Related Books

The following books provide additional information that you may need, and are occasionally referenced in this manual:

• Sundiag User's Guide covers information about Sundiag, a system exerciser that runs under the SunOS Operating System. Sundiag displays real-time use of system resources and peripherals.

• Introduction to Open Boot PROM 2.0 provides a summary of the Forth Toolkit commands.

• Desktop Storage Module Installation Guide describes how to connect the Desktop Storage Module to your system.

• SunDiagnostic Executive User's Guide for SPARCstations explains how to run extensive, configurable tests independent of SunOS. Use the SunDiagnostic Executive when you need thorough diagnostics.