Sun Microsystems Sun Fire V480, Administration Manual

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173
C H A P T E R
10
Isolating Failed Parts
The most important use of diagnostic tools is to isolate a failed hardware component
so that you can quickly remove and replace it. Because servers are complex
machines with many failure modes, there is no single diagnostic tool that can isolate
all hardware faults under all conditions. However, Sun provides a variety of tools
that can help you discern what component needs replacing.
This chapter guides you in choosing the best tools and describes how to use these
tools to reveal a failed part in your Sun Fire V480 server. It also explains how to use
the Locator LED to isolate a failed system in a large equipment room.
Tasks covered in this chapter include:
■
“How to Operate the Locator LED” on page 174
■
“How to Put the Server in Diagnostic Mode” on page 175
■
“How to Isolate Faults Using LEDs” on page 176
■
“How to Isolate Faults Using POST Diagnostics” on page 179
■
“How to Isolate Faults Using Interactive OpenBoot Diagnostics Tests” on
page 180
■
“How to View Diagnostic Test Results After the Fact” on page 183
■
“How to View and Set OpenBoot Configuration Variables” on page 184
Other information in this chapter includes:
■
“Reference for Choosing a Fault Isolation Tool” on page 185
If you want background information about the tools, turn to the section:
■
“About Isolating Faults in the System” on page 106
Note –
Many of the procedures in this chapter assume that you are familiar with the
OpenBoot firmware and that you know how to enter the OpenBoot environment.
For background information, see “About the ok Prompt” on page 55. For
instructions, see “How to Get to the ok Prompt” on page 132.