1    /AFTER

       /AFTER={time}
       /AFTER={current_time} (default)
       /NOAFTER

          The /AFTER qualifier keeps the script from executing
          until after the specified time.

          You can specify time as either an absolute time or
          as a combination of absolute and delta times. For
          complete information on specifying time values, see
          the VMS DCL Concepts Manual.

          The /AFTER qualifier has three states. It can be
          specified with a valid time, it can be omitted from
          the command line, or it can be negated (/NOAFTER). If
          /AFTER is specified with a valid time, the script is
          scheduled to execute after that time. If the /AFTER
          qualifier is omitted, the defragmentation software
          processes the command as if the /AFTER qualifier
          were specified with the current time. If /NOAFTER
          is specified, no starting time is associated with
          the script being defined. The /NOAFTER qualifier
          allows you to define a script without scheduling it
          to execute. To subsequently start the script, use the
          START subcommand.

2    /EPILOGUE

       /EPILOGUE={file-name}
       /NOEPILOGUE (default)

          The /EPILOGUE qualifier identifies a DCL command file
          which DFO executes upon completion of the DEFRAGMENT
          VOLUME operation.

3    /INTERVAL

       /INTERVAL={delta-time}
       /NOINTERVAL (default)

          Causes a script to execute at regularly scheduled
          intervals. The /INTERVAL qualifier specifies the
          minimum time between two consecutive executions of a
          script.

          Specify time as a delta time. Refer to the VMS DCL
          Concepts Manual for more information on specifying
          times. If you do not specify a time with the
          /INTERVAL qualifier, a default value of 1 day is
          used. This value causes the associated script to run
          every 24 hours.

          If you specify the /AFTER qualifier with the
          /INTERVAL qualifier, the first defragmentation
          operation occurs at or after the time specified
          by the /AFTER qualifier; all subsequent operations
          execute at intervals set according to the /INTERVAL
          qualifier.

4    /LOG

       /LOG={file-spec}
       /NOLOG (default)

          The /LOG qualifier causes the defragmentation process
          to create a file containing a list of all its
          operations. The information in the log file varies
          with the presence of the /FULL or /BRIEF qualifiers.
          The /FULL qualifier lists all files analyzed by the
          defragmentation process and reports their disposition
          during each phase of defragmentation. The /BRIEF
          qualifier lists only the statistics of each phase,
          such as number of files analyzed, and number of files
          defragmented.

5    /MAIL_NOTIFICATION

       /MAIL_NOTIFICATION
       /NOMAIL_NOTIFICATION (default)

          The /MAIL_NOTIFICATION qualifier requests that
          brief status and termination messages regarding
          defragmentation processes be mailed to the mail
          distribution list provided in the file DFG$MAIL_
          ADDRESS.

6    /NODE

       /NODE=(node-name[,...])
       /NONODE (default)

          The /NODE qualifier limits the scope of the
          DEFRAGMENT command to the node or set of nodes
          specified by /NODE=(node-name). By default,
          defragmentation processes may execute on any LMF
          licensed node in the system.

7    /OPCOM_NOTIFICATION

       /OPCOM_NOTIFICATION (default)
       /NOOPCOM_NOTIFICATION

          The /OPCOM_NOTIFICATION qualifier requests that
          brief status and termination messages regarding
          defragmentation processes be sent to OPCOM.

8    /PROLOGUE

       /PROLOGUE={file-name}
       /NOPROLOGUE (default)

          The /PROLOGUE qualifier identifies a DCL command file
          which DFO executes just before the DEFRAGMENT FILE
          operation starts.

9    /SCRIPT

       /SCRIPT={script-name}
       /NOSCRIPT (default)

          The /SCRIPT qualifier assigns a user-supplied name
          to a script. If a duplicate script-name is selected,
          defragmentation software issues a duplicate script
          name error message and does not enter the new script
          into the database-no defragmentation takes place.

          A script name may be up to 64 characters in length
          and may contain any of the following characters:

          o  Any alphanumeric character

          o  Underscore ( _ )

          o  Hyphen ( - )

          o  Dollar sign ( $ )

          Observe the following rules when naming a script:

          o  You can use any combination of uppercase and
             lowercase letters.

          o  You cannot begin script names using the dollar
             sign, but you can include the dollar sign within
             the script name. (The dollar sign is reserved for
             special use by Digital Equipment Corporation.)

          o  You should not end a script name with a hyphen,
             since the hyphen is the DCL continuation
             character.

          The VMS DCL Concepts Manual contains more information
          on naming conventions.