201Chapter K - Diagnosis Program GDTMONK.3.5.2 Hot Plug: Replace Mirror DriveIf a RAID 1 or RAID 10 host drive has already been set up, a defective drive can be replaced(hot plug) while the system continues to be fully operational.There are typically two different applications, where a Hot Plug beomes necessary.Application 1. The RAID 1/10 disk array is in the fault tolerant (both drives are vaild: vv).It is likely that a drive will fail soon (for example when there is a loud operating noise). As apreventative measure, this drive ought to be exchanged now, that is, in a moment when thedisk array is still in a ready status and still has redundancy.Application 2. The disk array is no longer fault tolerant, because a drive of the disk arrayhas actually failed. The disk array is still fully operational, but it does not have redundancyany more. If another drive should fail, too, the disk array's functionality is i mpaired.
