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Detecting and Managing Faults 35
POST Overview
Power-on self-test (POST) is a group of PROM-based tests that run when the server is
powered on or when it is reset. POST checks the basic integrity of the critical
hardware components in the server (CMP, memory, and I/O subsystem).
If POST detects a faulty component, the component is disabled automatically. If the
system is able to run without the disabled component, it will boot when POST
completes its tests. For example, if POST detects a faulty processor core, the core will
be disabled and, once POST completes its test sequence, the system will boot and run
using the remaining cores.
You can control various aspects of how POST performs its operations. For example,
you can specify the events that cause POST to run, the level of testing POST
performs, and the amount of diagnostic information POST displays. You use the
ILOM set command to control the state of the applicable ILOM properties. These
properties are listed and described in “ILOM Properties that Affect POST Behavior”
on page 35.
Related Information
■ “Managing POST Operations” on page 35
Managing POST Operations
These topics explain how to control the way POST performs its operations.
■ “ILOM Properties that Affect POST Behavior” on page 35
■ “Examples of POST Management” on page 37
Related Information
■ “ILOM Properties that Affect POST Behavior” on page 35
■ “Examples of POST Management” on page 37
■ “POST Output Quick Reference” on page 42
ILOM Properties that Affect POST Behavior
The following table describes the ILOM properties that determine how POST
performs its operations.