Hard disk drive problems
This topic provides a list of suggested actions for problems with the hard disk
drive.
About this task
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 4, “Parts listing, Types 7145, 7146, 7143, and 7191,” on page 81 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 Action
Not all drives are recognized by
the DSA hard disk drive
diagnostic test.
Remove the drive that is indicated by DSA (see “Removing a hot-swap hard disk
drive” on page 117); then, run the hard disk drive diagnostic test again (see “IBM
Dynamic System Analysis” on page 71). If the remaining drives are recognized,
replace the drive that you removed with a new one.
The server stops responding
during the hard disk drive
diagnostic test.
Remove the hard disk drive that was being tested when the server stopped
responding (see “Removing a hot-swap hard disk drive” on page 117), and run
the diagnostic test again (see “IBM Dynamic System Analysis” on page 71). If the
hard disk drive diagnostic test runs successfully, replace the drive that you
removed with a new one (see “Replacing a hot-swap hard disk drive” on page
118).
A hard disk drive was not
detected while the operating
system was being started.
Reseat all hard disk drives and cables; then, run the DSA hard disk drive
diagnostic test again (see “IBM Dynamic System Analysis” on page 71).
A hard disk drive passes the
DSA hard disk drive diagnostic
test but the problem remains.
Run the diagnostic SAS Fixed Disk Test (see “IBM Dynamic System Analysis” on
page 71).
Note: This test is not available to servers that use RAID or servers with IDE or
SATA hard disk drives.
Intermittent problems
This topic provides possible solutions to problems that occur occasionally and are
difficult to diagnose.
About this task
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 4, “Parts listing, Types 7145, 7146, 7143, and 7191,” on page 81 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 Action
A problem occurs only
occasionally and is difficult to
diagnose.
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 grill. If there is no
airflow, the fan is not working. This can cause the server to overheat and
shut down.
2. Check the event logs (see “Event logs” on page 38).
3. See “Solving undetermined problems” on page 77.
Chapter 3. Diagnostics 45
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