Configuration: Disk Groups and Virtual Disks 1135 To assign hot spares, in the Hot Spare Coverage window, select a diskgroup in the Hot spare coverage area.6 Review the information about the hot spare coverage in the Details area.7 Click Assign.The Assign Hot Spare window is displayed.8 Select the relevant Physical disks in the Unassigned physical disks area, ashot spares for the selected disk and click OK.9 To unassign hot spares, in the Hot Spare Coverage window, select physicaldisks in the Hot spare physical disks area.10 Review the information about the hot spare coverage in the Details area.11 Click Unassign.A message prompts you to confirm the operation.12 Type yes and click OK.Hot Spares and RebuildA valuable strategy to protect data is to assign available physical disks in thestorage array as hot spares. A hot spare adds another level of fault tolerance tothe storage array.A hot spare is an idle, powered-on, stand-by physical disk ready for immediateuse in case of disk failure. If a hot spare is defined in an enclosure in which aredundant virtual disk experiences a physical disk failure, a rebuild of thedegraded virtual disk is automatically initiated by the RAID controllermodules. If no hot spares are defined, the rebuild process is initiated by theRAID controller modules when a replacement physical disk is inserted intothe storage array.Global Hot SparesThe MD3200 series supports global hot spares. A global hot spare can replacea failed physical disk in any virtual disk with a redundant RAID level as longas the capacity of the hot spare is equal to or larger than the size of theconfigured capacity on the physical disk it replaces, including its metadata.
