During a backup operation, the amount of data that
is backed up may not equal the size of the Oracle files that are on
the disk. This behavior is normal. Backup Exec backs up the
selected data files as well as a copy of the control file.
In a Central Admin Server Option environment, all
backup jobs for a specific Oracle instance must be delegated to the
same managed media server. If you do not restrict the back up job
to the same managed media server, then before you can restore data,
you must move the physical media that contains the backup sets to a
single managed media server.