Replace any defective hardware and add new disks to the dynamic disk group, as necessary. The number assigned to a new disk, for example harddisk5, may not be the same as the disk number of the failed disk.
Note the new disk number(s). You will need the information later on to add the disks to the dynamic disk group and for the recovery operation.
To replace the hardware and add the new disks to the dynamic disk group
If the new disk has never been used before, it is unsigned and needs a disk signature. In this case, the disk appears in the left pane of the VEA console and is marked with (No Signature), for example, harddisk5 (No signature). Proceed to the next step.
After a signature appears on a disk, the disk will display as a basic disk.
This adds the disk to the dynamic disk group of the volumes associated with the production Exchange mailbox database.