IBM 8681 Hardware Maintenance Manual - Page 13

General checkout, the continued or new error condition.

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General checkout The server diagnostic programs are stored in flash RAM on the I/O function card. These programs are the primary method of testing the major components of the server. You can also use them to test some external devices. 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. Note Some error conditions will generate error messages that are displayed in the front panel video fluorescent display (VFD). Some of these messages will automatically be cleared once the problem is corrected. Others will need to be cleared manually. To ensure you have correctly identified the failing FRU during your diagnosis, manually clear any messages from the front panel display using the scroll and enter buttons on the right side of the front panel after you have replaced any FRU(s). This can be done with the system in the Standby mode before power up. Then, once you reboot the system, if a problem still exists which normally generates a message on the front panel, the new message generated will alert you to the continued or new error condition. 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 suspect to be part of a shared DASD cluster, all diagnostic tests can be run except diagnostic tests which tests the storage unit (DASD residing in the storage unit) or the storage adapter attached to the storage unit. Netfinity 8500R - Type 8681 5

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General checkout
The server diagnostic programs are stored in flash RAM
on the I/O function card.
These programs are the primary
method of testing the major components of the server.
You can also use them to test some external devices.
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.
Note
Some error conditions will generate error messages
that are displayed in the front panel video fluorescent
display (VFD).
Some of these messages will
automatically be cleared once the problem is
corrected.
Others will need to be cleared manually.
To ensure you have correctly identified the failing FRU
during your diagnosis, manually clear any messages
from the front panel display using the scroll and enter
buttons on the right side of the front panel after you
have replaced any FRU(s).
This can be done with the
system in the Standby mode before power up. Then,
once you reboot the system, if a problem still exists
which normally generates a message on the front
panel, the new message generated will alert you to
the continued or new error condition.
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 suspect to be part of a shared
DASD cluster, all diagnostic tests can be run except
diagnostic tests which tests the storage unit (DASD
residing in the storage unit) or the storage adapter
attached to the storage unit.
Netfinity 8500R - Type 8681
5