Sun Microsystems Sun Fire V490 - Manual (Page 203)

Chapter 10 Isolating Failed Parts 175
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 V490 server. For background information about POST
diagnostics and the boot process, see Chapter 6.
Before You Begin
You must ensure that the system is configured to run diagnostic tests. See:
■ “Controlling POST Diagnostics” on page 82
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 the system controller (SC).
Note – A server can have only one system console at a time, so if you redirect
output to the system controller, 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 V490 server or establish a tip
connection to another Sun system. See:
■
“How to Set Up an Alphanumeric Terminal as the System Console” on page 133
■ “How to Access the System Console via tip Connection” on page 129
2. (Optional) Redirect console output to the system controller, if desired.
For instructions, see “How to Redirect the System Console to the System Controller”
on page 159.