Restore with Volume Shadowing

Whenever rebuilding a disk from an image backup, the disk is unavailable for other uses. The volume shadow restore operation requires that the shadow set be dissolved before the restore operation. After the restoration is complete, the shadow set is reformed with the newly restored disk as the base. As the other disks are added, they are made to match this restored disk. In the following example, assume the same shadow set as before is used. First, dissolve the shadow set:

    $ DISMOUNT/SYSTEM  DSA1: 

Next, restore the save set to one of the devices like this. The MOUNT/FOREIGN command has been left out of previous examples to simplify them. Because this example is a bit more complicated, that command is illustrated as well.

      $ MOUNT/FOREIGN/OVERRIDE=SHADOW $1$DUA8:      $ BACKUP/IMAGE/VERIFY -      _$ MUA400:FULLBU.SAV/REWIND/LABEL=FULL -      _$ $1$DUA8: 

Finally, recreate the shadow set based on the newly restored $1$DUA8:. Let OpenVMS (or the RAID controller) take care of synchronizing the other disks.

     $ MOUNT/SYSTEM DSA1:/SHADOW=($1$DUA8:, $1$DUA9:, $1$DUA10:) USER 

If incremental backups are involved, they would be applied before recreating the shadow set just as in the restore examples. This case will not be discussed further.