Ultra Start 450 SERIES Manuel d'instructions télécharger pdf (Page 413)

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Chapter 8 Diagnostics and Troubleshooting 393

About Troubleshooting Your System

The system provides the following features to help you identify and isolate

hardware problems:

■ Error indications

■ Software commands

■ Diagnostic tools

This section describes the error indications and software commands provided

to help you troubleshoot your system. Diagnostic tools are covered in “About

Diagnostic Tools” on page 370.

Error Indications

The system provides error indications via LEDs and error messages. Using the two

in combination, you can isolate a problem to a particular field-replaceable unit (FRU)

with a high degree of confidence.

The system provides fault LEDs in the following places:

■ Front panel

■ Keyboard

■ Power supplies

■ Disk drives

Error messages are logged in the /var/adm/messages file and also displayed

on the system console by the diagnostic tools.

Front Panel LEDs

Front panel LEDs provide your first indication if there is problem with your system.

Usually, a front panel LED is not the sole indication of a problem. Error messages

and even other LEDs can help to isolate the problem further.

The front panel has a general fault indicator ( ) that lights whenever POST or

OBDiag detects any kind of fault. It addition, it has LEDs that indicate problems

with the internal disk drives, power supply subsystem, or fans. See “About the

Status and Control Panel” on page 8 for more information on these LEDs and their

meaning.

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Ultra Start 450 SERIES Manuel d'instructions Page 413

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