Hard Drive Installation and Replacement
Compaq Smart Array 5i Plus Controller and Battery Backed Write Cache User Guide
D-7
COMPAQ CONFIDENTIAL
Writer: Amy L. Laffitte File Name: m-appd Hard Drive Installation and Replacement
Codename: Executor Part Number: 266328-001 Last Saved On: 4/18/02 2:51 PM
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If the amber failure LED is illuminated or other LEDs go out, the replacement
drive has failed and is producing unrecoverable disk errors.
Remove and replace the failed replacement drive.
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If the Automatic Data Recovery process has abnormally terminated, one possible
cause is a non-correctable read error on another physical drive. The system may
temporarily become operational if rebooted. In any case, locate the faulty drive,
replace it, and restore data from backup.
General Aspects of Drive Replacement
Before replacing a degraded drive, use Compaq Insight Manager to examine the error
counters recorded for each physical drive in the array to verify that such errors are
not presently occurring. Refer to the Compaq Insight Manager documentation on the
Compaq Management CD for details.
CAUTION:
Sometimes, a drive that has previously been failed by the controller 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.
There are several other factors to remember when replacing a hard drive:
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Non-hot-pluggable drives should only be replaced while the system is powered
down.
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Hot-pluggable drives can be removed and replaced at any time, whether the host
or storage system power is on or off.
When a hot-pluggable drive is inserted, all disk activity on the array pauses while
the new drive is spinning up (usually 20 seconds or so). If the drive is inserted
while power is on, in a fault-tolerant configuration, data recovery onto the
replacement drive begins automatically (indicated by the blinking Online LED).
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Replacement drives must have a capacity no less than that of the smallest drive in
the array. Drives of insufficient capacity will be failed immediately by the
controller before Automatic Data Recovery can begin.
