/UNTIL=<absolute-or-delta-time>

    Controls whether the defragment operation will be terminated
    after the specified time. When the time period has been reached,
    the operation will terminate at the end of the file currently
    being defragmented (i.e., if the file takes 5 minutes to
    defragment, and the timer expires after one minute, the current
    file will complete and no further files will be defragmented).
    This is similar to how CTRL/C functions.

    Absolute time includes a specific date or time of day. An
    absolute date/time has one of the following formats:

    o  dd-mmm-yyyy

    o  hh:mm:ss.cc

    o  dd-mmm-yyyy:hh:mm:ss.cc

    o  "dd-mmm-yyyy hh:mm:ss.cc"

    o  BOOT

    o  LOGIN

    o  TODAY

    o  TOMORROW

    o  YESTERDAY

    You can omit any of the trailing fields in the date or time. You
    can omit any of the fields in the middle of the format as long as
    you specify the punctuation marks, for example, "-mmm-yyyy hh".

    Delta time is an offset from the current time to a time in the
    future. Delta time has the following format:

    o  "+[dddd-][hh:mm:ss.cc]"

    You can truncate delta time after the hour field. You can also
    omit any of the fields after the hour field format as long as you
    specify the punctuation marks.

    Combination time consists of an absolute time value plus or
    minus a delta time value. Combination time can use either of
    the following formats:

    o  "[absolute time][+delta time]"

    o  [absolute time][-delta time]

    You can omit the absolute time value. If you do, the delta
    time is offset from the current date and time. Whenever a plus
    sign (+) precedes the delta time value, enclose the entire time
    specification in quotation marks.