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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," on page 109 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
Multiple hard disk drives are
offline.
A replacement hard disk drive
does not rebuild.
A green hard disk drive activity
LED does not accurately
represent the actual state of the
associated drive.
An amber hard disk drive status
LED does not accurately
represent the actual state of the
associated drive.
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 4, "Parts listing," on page 109 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
1. Review the storage subsystem logs for indications of problems within the
storage subsystem, such as backplane or cable problems.
2. See "Problem determination tips" on page 108.
1. Make sure that the hard disk drive is recognized by the controller (the green
hard disk drive activity LED is flashing).
2. Review the SAS RAID controller documentation to determine the correct
configuration parameters and settings.
1. If the green hard disk drive activity LED does not flash when the drive is in use,
run the DSA disk drive test.
2. Use one of the following procedures:
v If the drive passes the test, replace the backplane.
v If the drive fails the test, replace the drive.
1. If the amber hard disk drive LED and the RAID controller software do not
indicate the same status for the drive, complete the following steps:
a. Turn off the system-board tray.
b. Reseat the SAS controller.
c. Reseat the backplane signal cable, backplane power cable, and SAS
expander card (if the server has 12 drive bays).
d. Reseat the hard disk drive.
e. Turn on the system-board tray and observe the activity of the hard disk
drive LEDs.
2. See "Problem determination tips" on page 108.
Action
1. Make sure that:
v All cables are connected securely to the front of the system-board tray and
the power cord is connected securely to the rear of the chassis.
v When the system-board tray is turned on, air is flowing from the rear of the
chassis. If there is no airflow, the fan assembly is not working. This causes
the system-board tray to overheat and shut down.
2. Check the system-event log (see "Event logs" on page 25).
3. See "Solving undetermined problems" on page 106.
33
Chapter 3. Diagnostics
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