HP D6000 User Manual download pdf (Page 33)

Troubleshooting 33

Time required for a rebuild

The time required for a rebuild varies considerably, depending on several factors:

• The priority that the rebuild is given over normal I/O operations (you can change the priority setting by

using ACU)

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

• The rotational speed of the hard drives

• The availability of drive cache

• The brand, model, and age of the drives

• The amount of unused capacity on the drives

• The number of drives in the array (for RAID 5 and RAID 6 with ADG)

Allow approximately 1 minute per gigabyte for the rebuild process to be completed.

System performance is affected during the rebuild, and the system is unprotected against further drive failure

until the rebuild has finished. Therefore, replace drives during periods of low activity when possible.

CAUTION: If the Online LED of the replacement drive stops blinking and the amber Fault LED

glows, or if other drive LEDs in the array go out, the replacement drive has failed and is producing

unrecoverable disk errors. Remove and replace the failed replacement drive.

When automatic data recovery has finished, the Online LED of the replacement drive stops flashing and

begins to glow steadily.

Failure of another drive during rebuild

If a non-correctable read error occurs on another physical drive in the array during the rebuild process, the

Online LED of the replacement drive stops blinking and the rebuild abnormally terminates.

If this situation occurs, reboot the server. The system may temporarily become operational long enough to

allow recovery of unsaved data. In any case, locate the faulty drive, replace it, and restore data from

backup.

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HP D6000 User Manual Page 33