Types of Hot Spares

The following two types of hot spare are available:

  • Global Hot Spare

    This is available for any RAID group. When multiple hot spares are installed, the most appropriate hot spare is automatically selected and incorporated into a RAID group.

  • Dedicated Hot Spare

    This is only available to the specified RAID group (one RAID group).

    The Dedicated Hot Spare cannot be registered in a RAID group that is registered in TPPs, FTRPs, REC Disk Buffers, or Extreme Cache Pools.

Note

  • Assign "Dedicated Hot Spares" to RAID groups that contain important data, in order to preferentially improve their access to hot spares.

  • When a drive that belongs to a RAID group for which a Dedicated Hot Spare is registered fails, the Dedicated Hot Spare is given a higher priority than the Global Hot Spares. When a drive fails and no unused Dedicated Hot Spares are available, a Global Hot Spare is used.

  • When an Advanced Format disk is used as a hot spare, the sector format information that can be confirmed on the server may change when used as a hot spare.