Sun Microsystems Netra T5220 - Reasons to Run POST; Verifying Hardware Functionality; Diagnosing the System Hardware; Running POST in Maximum Mode

Chapter 1 Server Diagnostics 1-31
To change the POST parameters using the setsc command, you must first set the
setkeyswitch parameter to normal. Then you can change the POST parameters
using the setsc command:
For example:
1.5.3 Reasons to Run POST
You can use POST for basic hardware verification and diagnosis, and for
troubleshooting as described in the following sections.
1.5.3.1 Verifying Hardware Functionality
POST tests critical hardware components to verify functionality before the system
boots and accesses software. If POST detects an error, the faulty component is
disabled automatically, preventing faulty hardware from potentially harming
software.
1.5.3.2 Diagnosing the System Hardware
You can use POST as an initial diagnostic tool for the system hardware. In this case,
configure POST to run in maximum mode (diag_mode=service, setkeyswitch=
diag, diag_level=max) for thorough test coverage and verbose output.
1.5.4 Running POST in Maximum Mode
This procedure describes how to run POST when you want maximum testing, as in
the case when you are troubleshooting a server or verifying a hardware upgrade or
repair.
sc> setkeyswitch normal
sc> setsc value
sc> setkeyswitch normal
sc> setsc diag_mode service