RAID 1: breaking mirrors and rebuilding drives, 4th Edition

Figure 1. Boot-up message indicating that the logical drive is still available but missing physical drives
NOTE
If the logical drive fails and the server will not boot, you
probably removed two drives that were mirrored to one another.
Shut down the server if this occurs. Reinstall all drives and
reboot. The drives mirrored to one another will be marked okay.
All data should remain intact. Start again at step 1, being
careful not to remove any drives mirrored to one another.
8. Insert the new drive(s) into the open drive bay. The array rebuild should start automatically. The
replacement drives must be the same type (SATA or SAS) and the same or greater capacity as the
original drives. If the rebuild does not start automatically, reboot and press F1 to enable rebuild at
the 1786 Recovery Needed POST message prompt.
NOTE
The drive-online LED will blink during the rebuild process. The
rebuild is complete when the LED stops blinking and turns solid
green. A 300-GB SAS (3.5” 15K) drive can take up to 2 hours
to rebuild a mirrored array (depending on the number of IOPS
the server is submitting to the controller).
9. Boot the OS after the rebuild completes.
Rebuilding the array re-mirrors it and brings it back into a fault-tolerant state.
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