VMS disks can be duplicated over a network from a production system to a backup
system using BacPac.
BacPac performs full image copies of disks from one VMS system to another without
requiring that the systems be clustered. The copied disks are duplicates of the
original disks and are available as soon as the copy completes.
BacPac provides added backup safety by optionally creating a saveset backup
of a source disk at the same time as the copy is being made.
BacPac disk duplication offers these advantages over saveset backups:
Backups are faster because BacPac includes fast data compression
to minimize the network transfer time
Switchover to the backup computer is faster because there
is no waiting to restore the disks from savesets
Backups are safer because the redundant savesets provide a
backup even if a target disk fails
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