General checkout
The server diagnostic programs are stored in upgradable
Also, if you cannot determine whether a problem is caused by the hardware or by the software, you can run the diagnostic programs to confirm that the hardware is working properly.
When you run the diagnostic programs, a single problem might cause several error messages. When this occurs, work to correct the cause of the first error message. After the cause of the first error message is corrected, the other error messages might not occur the next time you run the test.
A failed system might be part of a shared DASD cluster (two or more systems sharing the same external storage device(s)). Prior to running diagnostics, verify that the failing system is not part of a shared DASD cluster.
A system might be part of a cluster if:
•The customer identifies the system as part of a cluster.
•One or more external storage units are attached to the system and at least one of the attached storage units is additionally attached to another system or unidentifiable source.
•One or more systems are located near the failing system.
If the failing system is suspected to be part of a shared DASD cluster, all diagnostic tests can be run except diagnostic tests which test the storage unit (DASD residing in the storage unit) or the storage adapter attached to the storage unit.
Notes:
1.For systems that are part of a shared DASD cluster, run one test at a time in looped mode. Do not run all tests in looped mode, as this could enable the DASD diagnostic tests.
2.If multiple error codes are displayed, diagnose the first error code displayed.
3.If the computer hangs with a POST error, go to the “Chapter .
4.If the computer hangs and no error is displayed, go to “Undetermined problems” on page 100.
5.Power supply problems, see “Chapter .
6.Safety information, see “Safety information” on page 105.
7.For intermittent problems, check the error log; see “POST error messages” on page 9.
1.IS THE SYSTEM PART OF A CLUSTER?
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