User's Manual

Physical Disks or Physical Devices 211
Rebuild
Does my controller support this feature? See Supported Features .
Use the Rebuild task to reconstruct data when a physical disk in a redundant
virtual disk fails. For more information, see
Replacing a Failed Disk that is Part
of a Redundant Virtual Disk
.
Rebuilding a disk may take several hours.
Cancel Rebuild
Does my controller support this feature? See Supported Features .
Use the Cancel Rebuild task to cancel a rebuild that is in progress. If you
cancel a rebuild, the virtual disk remains in a degraded state. The failure of an
additional physical disk can cause the virtual disk to fail and may result in
data loss. It is recommended that you rebuild the failed physical disk as soon
as possible.
NOTE: If you cancel the rebuild of a physical disk that is assigned as a hot spare,
you must reinitiate the rebuild on the same physical disk in order to restore the data.
Canceling the rebuild of a physical disk and then assigning another physical disk as
a hot spare does not cause the newly assigned hot spare to rebuild the data. You
must reinitiate the rebuild on the physical disk that was the original hot spare.
Assign and Unassign Global Hot Spare
Does my controller support this feature? See Supported Features .
A global hot spare is an unused backup disk that is part of the disk group. Hot
spares remain in standby mode. When a physical disk that is used in a virtual
disk fails, the assigned hot spare is activated to replace the failed physical disk
without interrupting the system or requiring your intervention. When a hot
spare is activated, it rebuilds the data for all redundant virtual disks that were
using the failed physical disk.
You can change the hot spare assignment by unassigning a disk and choosing
another disk as needed. You can also assign more than one physical disk as a
global hot spare.
NOTE: On SAS 6/iR controllers, you cannot assign physical disks that have boot
partitions, as hot spares.