Technical data

Using BACKUP
11.17 Backing Up and Restoring the System Disk
15. Store the backup tapes in a safe place.
11.17.4 Restoring the System Disk from Tape
If a problem occurs that renders your system disk unbootable, you can restore the
system disk from your backup copy.
How to Perform This Task
To restore the system disk from tape, use the following procedure.
Note
The BACKUP restore operation creates a system disk that includes a set
of volume parameters provided by Compaq, including a cluster size (disk
access scheme). You can change most volume parameters later with the
SET VOLUME command. For cluster-mounted volumes, changes occur to
the nodes on which the SET VOLUME command is issued.
To change the cluster size, back up the system disk to a disk that
has been previously initialized with the cluster size that you want.
For more information about initializing a disk, see Section 9.3. For
more information about the BACKUP command qualifiers, refer to the
OpenVMS System Management Utilities Reference Manual.
1. Depending on your configuration, either boot standalone BACKUP or start
the menu system:
• If you have access to the OpenVMS Alpha or VAX operating system
distribution compact disc, start the menu system described in
Section 11.17.1.
• If you do not have access to the OpenVMS VAX Version operating system
distribution compact disc, boot standalone BACKUP as described in either
Section 11.17.2.2 or Section 11.17.2.4.
2. Determine the device name of the system disk you want to restore. (See
Section 8.2 for information about determining the names of your devices.)
3. Insert the first tape of the complete system disk backup into the drive. Make
sure the tape is write-protected.
4. Enter the BACKUP command in the following format:
BACKUP/IMAGE/VERIFY input-specifier:saveset.BCK/REWIND output-specifier:
where:
• input-specifier is the device name of the drive that holds the backup copy.
• saveset.BCK is the name of the save set.
• output-specifier is the device name of the system disk that you are
restoring.
For example:
$ BACKUP/IMAGE/VERIFY MUA0:DEC_31_BACKUP.BCK/REWIND DUA0:
5. The procedure displays the following message:
%BACKUP-I-STARTVERIFY, starting verification pass
Using BACKUP 11–61