IBM xSeries 440 8687, Hardware Maintenance Manual

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General checkout
The server diagnostic programs (see “Diagnostic programs and error messages” on
page 57.) are stored in the upgradeable electronically erasable programmable
read-only memory (EEPROM) on the I/O board and on the Resource CD. These
programs provide the primary methods of testing the major components of the
server.
If you cannot determine whether a problem is caused by the hardware or by the
software, run the diagnostic programs to confirm that the hardware is working
properly.
Note: 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.
A failed server might be part of a shared hard disk drive cluster (two or more
servers sharing one or more external storage devices). Before you run diagnostics,
verify that the failing server is not part of a shared storage device cluster.
A server might be part of a cluster if:
v The server is identified as part of a cluster.
v One or more external storage units are attached to the server and at least one of
the attached storage units is also attached to another server or unidentifiable
source.
v
One or more servers are located near the failing server.
If the failing server is suspected to be part of a shared hard disk drive cluster, run
all diagnostic tests except those that test the storage unit (storage device residing in
the storage unit) or the storage adapter attached to the storage unit.
Notes:
1. There might be a short delay between pressing an F key (F1, F2, Esc, etc.) and
the execution of the command.
2. For servers that are part of a shared hard disk drive cluster, run one test at a
time in looped mode. Do not run all tests in looped mode, because this could
enable the hard disk drive diagnostic tests.
3. If multiple error codes are displayed, diagnose the first error code that is
displayed.
4. If the server stops with a POST error, see “POST error codes” on page 181.
5. If the server stops and no error is displayed, see “Undetermined problems” on
page 192.
6. For power problems, see “Power supply LED errors” on page 180 and “12v bus
faults” on page 173.
7. For safety information, see “Safety information” on page 201.
8. For intermittent problems, check the system-error log (see “Error logs” on page
54).
© Copyright IBM Corp. 2001
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