Chapter 6. Hardware Maintenance; General Checkout; Using The Diagnostic Hardware; Solving Problems - IBM DS5100 Installation, User's, And Maintenance Manual

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 xxvii.

General checkout

Use the status LEDs, Symptom-to-FRU index, and the DS Storage Manager client
software to diagnose problems. See "Solving problems."
To diagnose a cluster system, use the cluster problem determination procedure in
the IBM System Storage Problem Determination Guide.
Note: If power was just applied to the storage subsystem, the green and amber

Using the diagnostic hardware

The DS5100 and DS5300 comes with an LC wrap-plug adapter and LC-LC coupler.
The wrap-plug adapter and LC-LC coupler are used to perform the loopback test
and to identify fibre path problems. See the IBM System Storage Problem
Determination Guide for more information.
The loopback test and the sendEcho test are described in the IBM System Storage
Problem Determination Guide. In the IBM System Storage SAN Integration Server
configuration, a loopback adapter (P/N 17P6918) is included to identify path
problems on the drive loop when using fibre channel 1.2 m copper cable (P/N
18P5237).

Solving problems

Always use the DS Storage Manager client to diagnose storage subsystem
problems and component failures and to find solutions to problems that have
definite symptoms.
You can use the symptom-to-FRU index (Table 56 on page 202) as a guide for
troubleshooting problems in addition to the DS Storage Manager Recovery Guru in
the Subsystem Management window. Do not depend solely on Table 56 on page
202 for FRU replacement decision.
Attention:
interconnect-battery units from the storage subsystem unless the Service Action
Allowed LED for the component is lit. Always use the appropriate procedure in
Chapter 5, "Replacing components," on page 167 to prevent an inadvertent
shutdown of the storage subsystem as a result of removing the storage subsystem
components in the wrong sequence.
© Copyright IBM Corp. 2009
LEDs might turn on and off intermittently. Wait up to five minutes for the
storage subsystem to finish powering up before you begin to check for faults.
Do not remove any power supply and fan units, controllers, or
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