VMS Help  —  RMU72  Backup  Database  Command Qualifiers, Journal
    Journal=file-name

    Allows you to specify a journal file to be used to improve
    tape performance during a restore operation. (This is not to
    be confused with an after-image journal file.)

    As the backup operation progresses, RMU Backup creates the
    journal file and writes to it a description of the backup
    operation containing identification of the tape drive names and
    the tape volumes and their contents. The default file extension
    is .jnl.

    The journal file must be written to disk; it cannot be written to
    tape along with the backup file. (Although you can copy the disk
    file to tape after it is written, if desired.)

    This journal file is used with the RMU Restore and the RMU Dump
    Backup commands to optimize their tape utilization.
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