The following examples show different ways to defragment a file
      or group of files and how to use the common qualifiers:

    1.$ DEFRAGMENT FILE *.C;*

      This command defragments all files with a .C extension in the
      user's current default directory. To determine the device
      and directory in which the files are located, issue the SHOW
      DEFAULT command.

    2.DFO> DEFRAGMENT FILE *.C;*

      This command defragments all files with a .C extension on the
      user's current default device. The only difference between
      this command and the previous example is that this command is
      entered from within the Disk File Optimizer utility instead of
      from the DCL prompt.

    3.$ DEFRAGMENT FILE SYS$SYSDEVICE:[000000...]*.C

      This command is the same as the previous one, except that
      the RMS default string is now explicitly identified as
      SYS$SYSDEVICE:[000000...]*.C;*.

    4.$ DEFRAGMENT FILE SYS$LOGIN:LOGIN.COM;2/EXCLUDE=*.OLD;*

      This command defragments the user's LOGIN.COM file and excludes
      all files with a .OLD extension.

    5.$ DEFRAGMENT FILE/INHERIT=OTHER_FILE_SCRIPT.NOAFTER

      This commands creates a file script identical to the OTHER_
      FILE_SCRIPT and allows the Disk File Optimizer to name it
      (DFG$XXX).

    6.$ DEFRAGMENT FILE SYS$SYSTEM:[000000...]*.RDB/INHERIT=X/SCRIPT=Y

      This command creates a script called Y . Other script
      characteristics, such as log file, are inherited from script
      X.