Recognizing Hard Drive Failure; Effects Of A Hard Drive Failure - HP StorageWorks 600 - Modular Disk System User Manual

Issue
System power
LED is off

Recognizing hard drive failure

In an HP MDS600, a steadily glowing Fault LED indicates that the drive has failed.
Other indications of failed hard drives:
•
The amber LED on the front of a storage system is lit if drives fail. (However, this LED also illuminates
when other problems occur, such as when a system fan fails, a redundant power supply fails, or the
system overheats.)
•
ACU represents failed drives with a distinctive icon.
•
HP SIM can detect failed drives remotely across a network. (For more information about HP SIM,
refer to the documentation on the Management CD.)
•
ADU lists all failed drives.
•
CPQONLIN identifies failed drives in a NetWare environment.
For additional information about diagnosing hard drive problems, see the HP ProLiant Servers
Troubleshooting Guide.
CAUTION:
system is power-cycled or (for a hot-pluggable drive) after the drive has been removed and
reinserted. However, continued use of such marginal drives may eventually result in data loss.
Replace the marginal drive as soon as possible.

Effects of a hard drive failure

When a hard drive fails, all logical drives that are in the same array are affected. Each logical drive in
an array may be using a different fault-tolerance method, so each logical drive can be affected
differently.
•
RAID 0 configurations cannot tolerate drive failure. If any physical drive in the array fails, all non-
fault-tolerant (RAID 0) logical drives in the same array will also fail.
•
RAID 1+0 configurations can tolerate multiple drive failures as long as no failed drives are mirrored
to one another (with no spares assigned).
•
RAID 5 configurations can tolerate one drive failure (with no spares assigned).
Possible reasons
•
The Power On/Standby button
was not pressed firmly or held
long enough.
•
The power supply might not be
inserted properly, it might have
a damaged connector, or it
might have failed.
•
The system might have
experienced a short.
•
Controller firmware might be
corrupted.
•
The system power block might
need to be replaced.
Sometimes, a drive that has previously failed may seem to be operational after the
Possible solutions
•
Press the Power On/Standby button and
hold for approximately 3 seconds.
•
Be sure that the power supply is undamaged
and is fully seated.
•
Be sure that all pins on connectors and
component are straight.
•
Be sure that all components are fully seated.
•
Flash the controller firmware.
•
Contact an authorized service provider for
assistance ("HP contact
page 40).
information" on
Troubleshooting 29