Sun Microsystems Sun Fire V480, Administration Manual

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Chapter 10 Isolating Failed Parts 179
How to Isolate Faults Using POST
Diagnostics
This section explains how to run power-on self-test (POST) diagnostics to isolate
faults in a Sun Fire V480 server. For background information about POST
diagnostics and the boot process, see Chapter 6.
Before You Begin
You must ensure that the system is in diagnostic mode. See:
■
“How to Put the Server in Diagnostic Mode” on page 175
You must additionally decide whether you want to view POST diagnostic output
locally, via a terminal or
tip
connection to the machine’s serial port, or remotely
after redirecting system console output to RSC.
Note –
A server can have only one system console at a time, so if you redirect
output to RSC, no information appears at the serial port (
ttya
).
What to Do
1. Set up a console for viewing POST messages.
Connect an alphanumeric terminal to the Sun Fire V480 server or establish a
tip
connection to another Sun system. See:
■
“How to Set Up an Alphanumeric Terminal as the System Console” on page 139
■
“How to Access the System Console via tip Connection” on page 134
2. ( Optional ) Redirect console output to RSC, if desired.
For instructions, see “How to Redirect the System Console to RSC” on page 165.
3. Press the Power button.
You can do this at the machine’s front panel or, if you are running your test session
remotely, using the RSC interface.
The system runs the POST diagnostics and displays status and error messages via
either the local serial terminal (
ttya
) or the redirected (RSC) system console.