Intermittent Problems - IBM xSeries 306m Problem Determination And Service Manual

v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See Chapter 3, "Parts listing, Type 8849 and Type 8491 server," on page 19 to determine which
components are customer replaceable units (CRU) and which components are field replaceable units
(FRU).
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Symptom
A hard disk drive passes the
diagnostic Fixed Disk Test but
the problem remains.

Intermittent problems

v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See Chapter 3, "Parts listing, Type 8849 and Type 8491 server," on page 19 to determine which
components are customer replaceable units (CRU) and which components are field replaceable units
(FRU).
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Symptom
A problem occurs only
occasionally and is difficult to
diagnose.
Action
Run the diagnostic SCSI Fixed Disk Test (see "Running the diagnostic programs"
on page 89).
Note: This test is not available on servers that have RAID arrays or servers that
have SATA hard disk drives. Use the Fixed Disk Test for SATA hard disk drives or
servers that have RAID arrays.
Action
1. Make sure that:
v All cables and cords are connected securely to the rear of the server and
attached devices.
v When the server is turned on, air is flowing from the fan grille. If there is no
airflow, the fan is not working. This can cause the server to overheat and
shut down.
2. Check the system-error log (see "Error logs" on page 65).
3. See "Solving undetermined problems" on page 110.
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Chapter 5. Diagnostics