Log
    Log=Brief
    Log=Full
    Nolog

    Specifies whether the processing of the command is reported
    to SYS$OUTPUT. Specify the Log qualifier to request that the
    progress of the restore operation be written to SYS$OUTPUT,
    or the Nolog qualifier to suppress this report. If you specify
    the Log=Brief option, which is the default if you use the Log
    option without a qualifier, the log contains the start and
    completion time of each storage area. If you specify the Log=Full
    option, the log also contains thread assignment and storage area
    statistics messages.

    If you do not specify the Log or the Nolog qualifier, the default
    is the current setting of the DCL verify switch. (The DCL SET
    VERIFY command controls the DCL verify switch.)