Log
    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 and
    the Nolog qualifier to suppress this report. If you specify
    neither, the default is the current setting of the DCL verify
    switch. (The DCL SET VERIFY command controls the DCL verify
    switch.)