IBM 8646 Hardware Maintenance Manual - Page 20

POST error messages, POST error log, Small computer system interface messages

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v One beep indicates the successful completion of POST. v More than one beep indicates that POST detected a problem. For more information, see "Beep symptoms" on page 91. POST error messages POST error messages occur during startup when POST finds a problem with the hardware or detects a change in the hardware configuration. For a list of POST errors, see "POST error codes" on page 99. POST error log The POST error log contains the three most recent error codes and messages that the system generated during POST. To view the contents of the error logs, start the Configuration/Setup Utility program (see "Starting the Configuration/Setup Utility program" on page 29); then, select Error Logs from the main menu. Small computer system interface messages The following table lists actions to take if you receive a SCSI error message. Note: If your server does not have a hard disk drive, ignore any message that indicates that the BIOS is not installed. You will get these messages only when running the SCSISelect Utility. Table 1. SCSI messages SCSI Messages Description All One or more of the following might be causing the problem. v A failing SCSI device (adapter, drive, controller) v An improper SCSI configuration v Duplicate SCSI IDs in the same SCSI chain v An improperly installed SCSI terminator v A defective SCSI terminator v An improperly installed cable v A defective cable Action: Verify that: v The external SCSI devices are turned on. External SCSI devices must be turned on before the server. v The cables for all external SCSI devices are connected correctly. v The last device in each SCSI chain is terminated properly. v The SCSI devices are configured correctly. If the above items are correct, run the diagnostic programs to obtain additional information about the failing device. Diagnostic programs and error messages The server diagnostic programs are stored in upgradable read-only memory (ROM) on the system board. These programs are the primary method of testing the major components of the server. 12 Hardware Maintenance Manual: xSeries 220 Type 8646

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v
One beep indicates the successful completion of POST.
v
More than one beep indicates that POST detected a problem. For more
information, see
“
Beep symptoms
”
on page 91.
POST error messages
POST error messages occur during startup when POST finds a problem with the
hardware or detects a change in the hardware configuration. For a list of POST
errors, see
“
POST error codes
”
on page 99.
POST error log
The POST error log contains the three most recent error codes and messages that
the system generated during POST.
To view the contents of the error logs, start the Configuration/Setup Utility
program (see
“
Starting the Configuration/Setup Utility program
”
on page 29); then,
select
Error Logs
from the main menu.
Small computer system interface messages
The following table lists actions to take if you receive a SCSI error message.
Note:
If your server does not have a hard disk drive, ignore any message that
indicates that the BIOS is not installed.
You will get these messages only when running the SCSISelect Utility.
Table 1. SCSI messages
SCSI Messages
Description
All
One or more of the following might be causing the problem.
v
A failing SCSI device (adapter, drive, controller)
v
An improper SCSI configuration
v
Duplicate SCSI IDs in the same SCSI chain
v
An improperly installed SCSI terminator
v
A defective SCSI terminator
v
An improperly installed cable
v
A defective cable
Action:
Verify that:
v
The external SCSI devices are turned on. External SCSI devices must
be turned on
before
the server.
v
The cables for all external SCSI devices are connected correctly.
v
The last device in each SCSI chain is terminated properly.
v
The SCSI devices are configured correctly.
If the above items are correct, run the diagnostic programs to obtain
additional information about the failing device.
Diagnostic programs and error messages
The server diagnostic programs are stored in upgradable read-only memory (ROM)
on the system board. These programs are the primary method of testing the major
components of the server.
12
Hardware Maintenance Manual: xSeries 220 Type 8646