Chapter 6. Hardware maintenance
This chapter contains information to help you solve some of the simpler problems
that you might have with your storage subsystem. It contains the problem indicators
and error messages along with suggested actions to take to resolve the problem.
For instructions on how to obtain service and technical assistance for your storage
subsystem and other IBM products, see “Getting information, help, and service” on
page xxiv.

General checkout

Use the indicator lights, the diagnostics and test information, the symptom-to-FRU
index, and the connected server Problem Determination and Service Guide to
diagnose problems.
The PD maps found in the IBM System Storage DS4000 Problem Determination
Guide provide you with additional diagnostic aids.

Solving problems

This section contains information to help you solve some of the problems you might
have with your storage subsystem. Table20 on page 154 contains the problem
symptoms and error messages, along with suggested actions to take to resolve
problems.
Always use the DS Storage Manager client to diagnose storage subsystem
problems and component failures and find solutions to problems that have definite
symptoms.
Youcan use Table 20 on page 154, which contains the problem symptoms and
error messages, along with suggested actions as a guide for troubleshooting
problems in addition to the DS Storage Manager Recovery Guru in the Subsystem
Management window. Do not depend solely Table20 on page 154 for a FRU
replacement decision.
See the problem determination maps in the DS4000 Problem Determination Guide
for more detailed procedures for problem isolation.
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