1.4.4.3 Hot-Swap Disk Rebuild
A Hot-Swap function can be used to rebuild disk drives in arrays with data
redundancy such as RAID level 0, 1, 0+1, 3, 5 and 6. If a hot spare is not
available, the failed disk drive must be replaced with a new disk drive so that
the data on the failed drive can be rebuilt. If a hot spare is available, the
rebuild starts automatically when a drive fails. The RAID subsystem
automatically and transparently rebuilds failed drives in the background with user
definable rebuild rates. The RAID subsystem will automatically restart the
system and the rebuild if the system is shut down or powered off abnormally
during a reconstruction procedure condition.
When a disk is Hot Swap,
although the system is functionally operational, the system may no longer be
fault tolerant. Fault tolerance will be lost until the removed drive is replaced
and the rebuild operation is completed.
