DEFRAG

Reorganizes the files on a disk to optimize disk performance. Do not use
this command when Windows 2 or 3.x is running (note: Win9x no problems.)

Syntax
    DEFRAG [drive:] [/F] [/S[:]order] [/B] [/SKIPHIGH] [/LCD | /BW | /G0]
    [/H]

    DEFRAG [drive:] [/U] [/B] [/SKIPHIGH] [/LCD | /BW | /G0] [/H]

Parameter

drive:
    Specifies the drive that contains the disk you want to optimize.

Switches

/F
    Defragments files and ensures that the disk contains no empty spaces
    between files.

/U
    Defragments files and leaves empty spaces, if any, between files.

/S
    Controls how the files are sorted in their directories. If you omit this
    switch, DEFRAG uses the current order on the disk. The colon (:) is
    optional. The following list describes each of the values you can use to
    sort files. Use any combination of the values, and do not separate these
    values with spaces.

    N
        In alphabetic order by name

    N-
        In reverse alphabetic order by name (Z through A)

    E
        In alphabetic order by extension

    E-
        In reverse alphabetic order by extension (Z through A)

    D
        By date and time, earliest first

    D-
        By date and time, latest first

    S
        By size, smallest first

    S-
        By size, largest first

/B
    Restarts your computer after files have been reorganized.

/SKIPHIGH
    Loads DEFRAG into conventional memory. By default, DEFRAG is loaded into
    upper memory, if upper memory is available.

/LCD
    Starts DEFRAG using an LCD color scheme.

/BW
    Starts DEFRAG using a black and white color scheme.

/G0
    Disables the graphic mouse and graphic character set.

/H
    Moves hidden files.