Disks most often need replacing when they fail or start to behave strangely. You can replace afailed dynamic disk by an empty basic disk. The volume configuration is recreated on the new disk. Active redundant volumes (mirrored and RAID-5) on the replaced disk are resynchronized automatically after disk replacement.

Failed volumes on the replaced disk, however, stay failed after disk replacement because no valid data is available for copy.

The disk replacement procedure can be performed only on a disk that has failed. The VEA console identifies the disk by renaming it "Missing Disk." If the disk replacement is successful, the replacement disk takes on the attributes of the failed disk, including the disk name.

If the original disk is returned to the system after it was replaced, it shows in the VEA console as a foreign disk and a disk group called Unknown Dg is created. Use the Merge Foreign Disk command to return the disk to the same dynamic disk group it was in before.