Time Required For A Rebuild; Failure Of Another Drive During Rebuild; Recovering From A Power Failure Reported From The Backplane - HP HPE D6020 Maintenance And Service Manual

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 HPE
Smart Storage Administrator)
• 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 node. 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.

Recovering from a power failure reported from the backplane

The flashing LED pattern is indication of power failure reported from the backplane. To recover:
1. Simultaneously press and hold the Power button and the flashing UID button until the power button LED is solid
amber (after approximately 4 seconds).
2. If Step 1 did not work, repeat the step, except press and hold the Power button and the other UID button.
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Troubleshooting