About Status Indicators; About Post Diagnostics - Sun Microsystems Sun Fire V445 Server Administration Manual

About Status Indicators

For a summary of the server's LED status indicators, see
page 10 and "Back Panel Indicators" on page

About POST Diagnostics

POST is a firmware program that is useful in determining if a portion of the system
has failed. POST verifies the core functionality of the system, including the CPU
module(s), motherboard, memory, and some on-board I/O devices, and generates
messages that can determine the nature of a hardware failure. POST can be run even
if the system is unable to boot.
POST detects CPU and Memory subsystem faults and is located in a SEEPROM on
the MBC (ALOM) board. POST can be set to run by the OpenBoot program at
power-on by setting three environment variables, the diag-switch?, diag-
trigger, and diag-level.
POST runs automatically when the system power is applied, or following a
noncritical error reset, if all of the following conditions apply:
diag-switch? is set to true or false (default is false)
diag-level is set to min, max, or menus (default is min)
diag-trigger is set to power-on-reset and error-reset (default is power-
on-reset and error-reset)
If diag-level is set to min or max, POST performs an abbreviated or extended test,
respectively. If diag-level is set to menus, a menu of all the tests executed at
power-up is displayed. POST diagnostic and error message reports are displayed on
a console.
For information on starting and controlling POST diagnostics, see
Command" on page 165.
"Front Panel Indicators" on
17.
"About the post
Chapter 8 Diagnostics 157