Hard Drive Installation and Replacement

In general, approximately 15 minutes is required to rebuild each gigabyte. The actual rebuild time depends on:

•The level of rebuild priority for the logical drive (this is set using one of the array configuration utilities that are described in Chapter 5)

•The amount of I/O activity occurring during the rebuild operation

•The disk drive speed

•The number of drives in the array (for RAID 5 and RAID ADG)

For example, the rebuild time when using 9-GB drives in a RAID 5 configuration varies from 10 minutes per gigabyte (for three drives) to 20 minutes per gigabyte (for 14 drives).

Failure of Automatic Data Recovery

If the Online LED of the replacement drive stops blinking during automatic data recovery, there are three possible causes:

•If the Online LED is glowing continuously, automatic data recovery was successful and has finished.

•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.

•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 Insight Manager to examine the error counters recorded for each physical drive in the array to confirm that such errors are not presently occurring. Refer to the Insight Manager documentation on the Management CD for details.

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HP Smart Array 641/642 Controller User Guide