Hard Disk Drive Problems; Intermittent Problems - IBM BladeCenter HS20 7981 Problem Determination And Service Manual

Hard disk drive 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 7981," on page 53 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
Not all drives are recognized by
the Fixed Disk or SAS Attached
Disk diagnostic test.
The blade server stops
responding during the Fixed
Disk or SAS Attached Disk
diagnostic test.
A hard disk drive passes the
Fixed Disk or SAS Attached
Disk diagnostics 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 7981," on page 53 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.
28
BladeCenter HS20 Type 7981: Problem Determination and Service Guide
Action
Remove the drive that is indicated by the diagnostic tests; then, run the Fixed Disk
or SAS Attached Disk diagnostic test again. If the remaining drives are recognized,
replace the drive that you removed with a new one.
Remove the hard disk drive that was being tested when the blade server stopped
responding, and run the diagnostic test again. If the Fixed Disk or SAS Attached
Disk diagnostic test runs successfully, replace the drive that you removed with a
new one.
Run the SAS Fixed Disk or SAS Attached Disk diagnostic test again. If the
diagnostics continue to pass but the drive continues to have a problem, replace the
drive with a new one.
Action
1. Make sure that:
v When the blade server is turned on, air is flowing from the rear of the blade
server at the blower grille. If there is no airflow, the blower is not working.
This causes the blade server to overheat and shut down.
v The SAS hard disk drives are configured correctly.
2. Check the BMC log (see "Error logs" on page 16).