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

    1.

    $ DEFRAGMENT FILE *.C

    This command defragments all files with a .C extension on the
    user's current default device. That is, the device portion of the
    directory specification returned from a DCL SHOW DEFAULT command.
    The RMS default string is [000000...]*.*;*.

    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 *.C/VOLUME=SYS$SYSDEVICE:

    This command is the same as the previous one, except that the RMS
    default string is now 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 *.RDB/INHERIT=X
    $_/SCRIPT=Y/VOLUME=SYS$SYSTEM

    This command creates a script called Y that defragments all RDB
    files on SYS$SYSTEM. Other script characteristics, such as log
    file, are inherited from script X.