About restoring from a disk snapshot
If the parameter is set to , the snapshot is retained on the mirror disk after the backup completes. From the command line, you can restore individual files or the entire snapshot directly from the disk, rather than restoring from tape.
Note:
Unless the backup was made with the Instant Recovery feature, you cannot restore from a snapshot by means of the Backup, Archive, and Restore interface. You must perform the restore manually at the command line.