FDFORMAT(8)                 System Administration                FDFORMAT(8)

NAME         top

       fdformat - low-level format a floppy disk

SYNOPSIS         top

       fdformat [options] device

DESCRIPTION         top

       fdformat does a low-level format on a floppy disk.  device is usually
       one of the following (for floppy devices the major = 2, and the minor
       is shown for informational purposes only):

              /dev/fd0d360  (minor = 4)
              /dev/fd0h1200 (minor = 8)
              /dev/fd0D360  (minor = 12)
              /dev/fd0H360  (minor = 12)
              /dev/fd0D720  (minor = 16)
              /dev/fd0H720  (minor = 16)
              /dev/fd0h360  (minor = 20)
              /dev/fd0h720  (minor = 24)
              /dev/fd0H1440 (minor = 28)

              /dev/fd1d360  (minor = 5)
              /dev/fd1h1200 (minor = 9)
              /dev/fd1D360  (minor = 13)
              /dev/fd1H360  (minor = 13)
              /dev/fd1D720  (minor = 17)
              /dev/fd1H720  (minor = 17)
              /dev/fd1h360  (minor = 21)
              /dev/fd1h720  (minor = 25)
              /dev/fd1H1440 (minor = 29)

       The generic floppy devices, /dev/fd0 and /dev/fd1, will fail to work
       with fdformat when a non-standard format is being used, or if the
       format has not been autodetected earlier.  In this case, use
       setfdprm(8) to load the disk parameters.

OPTIONS         top

       -f, --from N
              Start at the track N (default is 0).

       -t, --to N
              Stop at the track N.

       -r, --repair N
              Try to repair tracks failed during the verification (max N

       -n, --no-verify
              Skip the verification that is normally performed after the

       -V, --version
              Display version information and exit.

       -h, --help
              Display help text and exit.

SEE ALSO         top

       fd(4), emkfs(8), mkfs(8), setfdprm(8)

AUTHOR         top

       Werner Almesberger (

AVAILABILITY         top

       The fdformat command is part of the util-linux package and is
       available from

COLOPHON         top

       This page is part of the util-linux (a random collection of Linux
       utilities) project.  Information about the project can be found at 
       ⟨⟩.  If you have a
       bug report for this manual page, send it to  This page was obtained from the
       project's upstream Git repository
       ⟨git://⟩ on
       2019-07-28.  (At that time, the date of the most recent commit that
       was found in the repository was 2019-07-25.)  If you discover any
       rendering problems in this HTML version of the page, or you believe
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       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

util-linux                        July 2014                      FDFORMAT(8)