132 Configuration: Disk Groups and Virtual Disks8 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 thephysical disks 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 MD3600i Series supports global hot spares. A global hot spare canreplace a failed physical disk in any virtual disk with a redundant RAID levelas long as 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.
