IBM 8479 User Reference - Page 81

POST, Small computer system interface (SCSI) messages, A defective cable

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POST When you turn on the server, it performs a series of tests to check the operation of system components and some of the options that are installed in the server. This series of tests is called the power-on self-test, or POST. If POST finishes without detecting any problems, the first window of your operating system or application program appears. Notes: 1. If you have a power-on password set, you must type the password and press Enter, when prompted, before POST will continue. 2. A single problem might cause several error messages. When this occurs, work to correct the cause of the first error message. After you correct the cause of the first error message, the other error messages usually will not occur the next time you run the test. The possible types of beep codes that your system might emit are: Repeating long beeps Indicates that a memory error has occurred. Ensure that all DIMMs are correctly installed. One long beep and two short beeps Indicates that a video error has occurred and the BIOS code cannot initialize the video screen to display any additional information. Ensure that the video adapter is correctly installed. Small computer system interface (SCSI) messages If you receive a SCSI error message, one or more of the following might be causing the problem: • A failing SCSI device (adapter, drive, controller) • An improper SCSI configuration • Duplicate SCSI IDs in the same SCSI chain • An improperly installed SCSI terminator • A defective SCSI terminator • An improperly installed cable • A defective cable To solve the problem, verify that: • The external SCSI devices are turned on. External SCSI devices must be turned on before the server. • The cables for all external SCSI devices are connected correctly. • The last device in each SCSI chain is terminated properly. • The SCSI devices are configured correctly. If you have verified these items and the problem persists, run the diagnostic programs to obtain additional information about the failing device. If the error remains or recurs, call for service. Note: If your server does not have a SCSI hard disk drive, ignore any messages that indicates that the BIOS is not installed.You will get these messages only when running the SCSISelect Utility. Chapter 6. Solving problems 67

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Chapter 6.
Solving problems
67
POST
When you turn on the server, it performs a series of tests to check the operation of
system components and some of the options that are installed in the server. This
series of tests is called the power-on self-test, or POST.
If POST finishes without detecting any problems, the first window of your operating
system or application program appears.
Notes:
1.
If you have a power-on password set, you must type the password and press
Enter, when prompted, before POST will continue.
2.
A single problem might cause several error messages. When this occurs, work to
correct the cause of the first error message. After you correct the cause of the first
error message, the other error messages usually will not occur the next time you
run the test.
The possible types of beep codes that your system might emit are:
Repeating long beeps
Indicates that a memory error has occurred. Ensure that all DIMMs are
correctly installed.
One long beep and two short beeps
Indicates that a video error has occurred and the BIOS code cannot initialize
the video screen to display any additional information. Ensure that the video
adapter is correctly installed.
Small computer system interface (SCSI) messages
If you receive a SCSI error message, one or more of the following might be causing
the problem:
•
A failing SCSI device (adapter, drive, controller)
•
An improper SCSI configuration
•
Duplicate SCSI IDs in the same SCSI chain
•
An improperly installed SCSI terminator
•
A defective SCSI terminator
•
An improperly installed cable
•
A defective cable
To solve the problem, verify that:
•
The external SCSI devices are turned on. External SCSI devices must be turned
on
before
the server.
•
The cables for all external SCSI devices are connected correctly.
•
The last device in each SCSI chain is terminated properly.
•
The SCSI devices are configured correctly.
If you have verified these items and the problem persists, run the diagnostic programs
to obtain additional information about the failing device. If the error remains or recurs,
call for service.
Note:
If your server does not have a SCSI hard disk drive, ignore any messages that
indicates that the BIOS is not installed.You will get these messages only when
running the SCSISelect Utility.