HP 418800-B21 HP StorageWorks 70 Modular Smart Array Enclosure user guide (434 - Page 36

Recognizing hard drive failure

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Page 36 highlights

Is the system power LED green? Answer No Possible Reasons Possible Solutions • The Power On/Standby button has not been pressed firmly or held long enough. • The power supply may not be inserted properly, it may have a damaged connector, or it may have failed. • The system may have experienced a short. Controller firmware may be corrupted. • The system midplane and/or power button/LED assembly may need to be replaced. • Firmly press the Power On/Standby button and hold for approximately three seconds. • Be sure that the power supply is undamaged and is fully seated. Be sure that all pins on connectors and components are straight. • Be sure that all components are fully seated. • Flash the controller firmware (see Smart Components for ROM Flash). • Contact an authorized service provider for assistance. Recognizing hard drive failure In an HP enclosure, a steadily glowing fault LED indicates that a drive has failed. Other indications of failed hard drives are as follows: • ACU represents failed drives with a distinctive icon. • HP SIM can detect failed drives remotely across a network. (For more information about HP SIM, see 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: Sometimes, a drive that has previously failed may seem to be operational after the 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 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). • RAID 6 with ADG configurations can tolerate simultaneous failure of two drives (with no spares assigned). 36 Troubleshooting

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Is the system power LED green?
Answer
Possible Reasons
Possible Solutions
No
•
The Power On/Standby button
has not been pressed
fi
rmly or
held long enough.
•
The power supply may not be
inserted properly, it may have
a damaged connector, or it
may have failed.
•
The system may have
experienced a short. Controller
fi
rmware may be corrupted.
•
The system midplane and/or
power button/LED assembly
may need to be replaced.
•
Firmly press the Power
On/Standby button and
hold for approximately three
seconds.
•
Be sure that the power supply
is undamaged and is fully
seated. Be sure that all pins on
connectors and components
are straight.
•
Be sure that all components
are fully seated.
•
Flash the controller
fi
rmware
(see
Smart Components for
ROM Flash
).
•
Contact an authorized service
provider for assistance.
Recognizing hard drive failure
In an HP enclosure, a steadily glowing fault LED indicates that a drive has failed.
Other indications of failed hard drives are as follows:
•
ACU represents failed drives with a distinctive icon.
•
HP SIM can detect failed drives remotely across a network. (For more information about HP SIM,
see the documentation on the Management CD.)
•
ADU lists all failed drives.
•
CPQONLIN identi
fi
es failed drives in a NetWare environment.
For additional information about diagnosing hard drive problems, see the
HP ProLiant Servers
Troubleshooting Guide.
CAUTION:
Sometimes, a drive that has previously failed may seem to be operational after the 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 con
fi
gurations cannot tolerate drive failure. If any physical drive in the array fails, all
non-fault-tolerant (RAID 0) logical drives in the same array also fail.
•
RAID 1+0 con
fi
gurations can tolerate multiple drive failures as long as no failed drives are
mirrored to one another (with no spares assigned).
•
RAID 5 con
fi
gurations can tolerate one drive failure (with no spares assigned).
•
RAID 6 with ADG con
fi
gurations can tolerate simultaneous failure of two drives (with no spares
assigned).
36
Troubleshooting