Resumes an Incomplete or Suspended backup or restore job with
checkpoints from the last checkpoint. When backup with checkpoints
is resumed, the backup is resumed on the same media server. If Any
available is specified as the storage unit group, the backup may
use a different storage unit on the same media server. Or, if a
specific storage unit group is specified, the backup may use a
different storage unit on the same media server.
A backup job to a tape storage unit cannot be resumed on a disk
storage unit. A backup job to a disk storage unit cannot be resumed
on a tape storage unit.
A job may be in an incomplete state indefinitely and may be
resumed until the backup or the incomplete backup has expired.
The same is true for the optical storage units that are mixed
with tape devices. For example, If a backup originally started on
an optical device is resumed on a tape device, the backup fails
with a status 174. (Media Manager - system error occurred.) In this
situation, use a specific storage unit, or use storage unit groups
to separate the optical and the tape devices.
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