Power-on self-test (POST)
Power-on self-test (POST)
When you power-on the server, it performs a series of
tests to check the operation of server components and
some options. This series of tests is called the power-on
self-test, or POST.
POST does the following:
- Checks the operation of some basic system-board operations
- Checks the memory operation
- Compares the current server configuration with the
stored server configuration information
- Configures PCI adapters
- Starts the video operation
- Verifies that the drives (such as the diskette,
CD-ROM, and hard disk drives) are connected properly
If Power-On Self-Test is set to [Enhanced], numbers that
show the amount of memory being tested appear in the
top-left corner of the screen until the total amount of
memory in the system is reached. Options for running a
quick POST or accessing the Configuration/Setup Utility
program appear in the lower-left corner of the screen.
Quick mode is the default mode of operation. To change
the mode to [Enhanced], select Start Options from the
Configuration/Setup Utility program menu and follow the prompts on the screen.
Note:
The amount of available memory shown might be somewhat less than expected
because of BIOS shadowing in RAM.
If POST finishes without detecting any problems, the first
screen of the operating system or application program
appears (if you have not set a power-on password). If you
have set a power-on password, a password prompt
appears. You must enter the password before the first
screen of the operating system or application program will
appear. (For further information on using passwords, see
System Security).
If Power-On Status is set to [Enabled] and POST detects
a problem, you will hear multiple beeps or no beep. In
most cases, an error code appears in the top left corner of
the screen, and in some cases, a description of the error is
displayed beside the code. (Note that the screen will
sometimes display multiple error codes and descriptions.)
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