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Backing Up and Restoring Disk Information
Duplicating Backup Tapes With Backcopy
Backcopy lets you make one or two duplicate copies of tapes produced by the Backup
program in file mode. Backcopy does not duplicate tapes produced by Backup in
volume mode, or system image tapes (SITs).
There are several reasons to duplicate your backup tapes:
Disaster recovery for disk files
If you duplicate a backup tape, you can store each copy in a different location. Then,
if a disaster, such as a fire or flood, occurs at one location, the duplicate tape is safe
at the other location.
Distribution of disk files
After copying files to tape with the Backup program, you can make duplicate copies
of this tape for distribution to other systems. This procedure is especially useful for
systems that are not connected on a network.
Archival of disk files
After duplicating a backup tape, you can keep a copy of its content archived in case
you ever need to use its content again. This is true not just for disaster recovery, as
described above, but also in the event that you later need information from files you
at one point thought you would no longer need on your system.
Running Backcopy
When you run Backcopy, you can make one or two duplicate tapes. If you make one
duplicate copy, Backcopy generates a tape in the same format as the original tape unless:
You use labeled tapes.
You specify the ARCHIVEFORMAT option.
For these cases, Backcopy generates a tape in the archive tape format.
If you make two duplicate copies, Backcopy always generates the tape in tape format 3
(archive tape format).
Entering a Backcopy Command
You enter a Backcopy command at the TACL prompt or from a command file:
BACKCOPY [ / run-options / ] source-tape, dest-tape, *.*.*
[ , command-option ]
[ , command-option ]...
run-options
One or more run options. See the RUN command in the TACL Reference Manual.
Guardian User's Guide —425266-001
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Duplicating Backup Tapes With Backcopy
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