HP strongly recommends that you make a backup
copy of the system disk and, if your configuration allows it, upgrade
the backup copy. Then, if there are problems, you still have a working
NOTE: OpenVMS Engineering has encountered cases where
recovery from a failed upgrade has been difficult, expensive, or impossible
because no backup of the preupgrade system disk was available. Various
hardware or software failures or a power failure can make a partially
upgraded system disk unusable. A backup copy might be the only route
to recovery. The minimal time required to make a backup is a very
the operating system media, following the instructions for OpenVMS Integrity servers in Section B.6, and for OpenVMS Alpha in Section A.1.
the menu system to enter the DCL environment (option 8).
the system device and the target device on which you will make the
backup copy. (If you are backing up to tape, skip to the next step.)
For example, if your system disk is on DKA0: and the target device
is on DKA100:, you might use the following commands. The /OVERRIDE
qualifier used in this example allows you to mount the system disk
without entering its volume label. The /FOREIGN qualifier is required
for the target disk when you use the BACKUP /IMAGE command.
$$$ MOUNT /OVERRIDE=IDENTIFICATION DKA0:$$$ MOUNT /FOREIGN DKA100:
back up the system disk to a magnetic tape, enter the following commands,
where MTA0: is the magnetic tape drive and label is the volume label. Note that the BACKUP command automatically
mounts the tape and begins the backup to it.
back up to a device other than a magnetic tape drive, enter the BACKUP
command. For example, if your system disk is on DKA0: and your target
disk is on DKA100:, use the following command (the colons are required):
$$$ BACKUP /IMAGE /LOG DKA0: DKA100:
The /IMAGE qualifier causes the
Backup utility to produce a functionally equivalent copy of the system
disk, which is also bootable. The /LOG qualifier causes the procedure
to display the specification of each save set file being processed.
To compare the backed up files to the source files, use the /VERIFY
qualifier. If any discrepancies are detected, the Backup utility
displays an error message indicating the discrepancies.
out from the DCL environment.
down the system by selecting option 9 on the menu.
For more complete information about backup operations,
including a description of an alternative method that does not require
booting from the operating system media, see Appendix F. For more information about the Backup
utility, see the HP OpenVMS System Management Utilities
Reference Manual: A-L.