IBM Partner Pavilion DS4100 : - IBM switch Users and Maintenance Guide : Page 143

Chapter 6. Hardware maintenance

This chapter contains information to help you solve some of the simpler problems

that you might have with your storage server. 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

server and other IBM products, see “Getting information, help, and service” on page

xxvii.

Note: See the IBM TotalStorage DS4000 Problem Determination Guide for

additional troubleshooting and debugging procedures.

General checkout

Use the status LEDs, Symptom-to-FRU index, and the storage management

software to diagnose problems. See “Checking the LEDs” on page 71.

To diagnose a cluster system, use the cluster problem determination procedure in

the IBM TotalStorage DS4000 Problem Determination Guide.

Note: If power was just applied to the controller unit, the green and amber LEDs

might turn on and off intermittently. Wait until the controller unit finishes

powering up before you begin to check for faults.

Using the diagnostic hardware

The DS4100 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 TotalStorage DS4000 Problem

Determination Guide for more information.

The loopback test and the sendEcho test are described in the IBM TotalStorage

DS4000 Problem Determination Guide. In the IBM TotalStorage 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 DS4000 Storage Manager client to diagnose storage server

problems and component failures. Also use the symptom-to-FRU index (Table 17 on

page 112) to find solutions to problems that have definite symptoms.

See the problem determination maps in the IBM TotalStorage DS4000 Problem

Determination Guide for more detailed procedures for problem isolation.