mkdosfs - create an MS-DOS file system under Linux
mkdosfs [ -A ] [ -b sector-of-backup ] [ -c ] [ -l filename ] [ -C ] [ -f number-of-FATs ]
[ -F FAT-size ] [ -i volume-id ] [ -I ] [ -m message-file ] [ -n volume-name ] [ -r root-
dir-entries ] [ -R number-of-reserved-sectors ] [ -s sectors-per-cluster ] [ -S logical-
sector-size ] [ -v ] device [ block-count ]
mkdosfs is used to create an MS-DOS file system under Linux on a device (usually a disk
partition). device is the special file corresponding to the device (e.g /dev/hdXX).
block-count is the number of blocks on the device. If omitted, mkdosfs automatically
determiness the file system size.
-A Use Atari variation of the MS-DOS filesystem. This is default if mkdosfs is run on
an Atari, then this option turns off Atari format. There are some differences when
using Atari format: If not directed otherwise by the user, mkdosfs will always use
2 sectors per cluster, since GEMDOS doesn't like other values very much. It will
also obey the maximum number of sectors GEMDOS can handle. Larger filesystems are
managed by raising the logical sector size. Under Atari format, an Atari-compati-
ble serial number for the filesystem is generated, and a 12 bit FAT is used only
for filesystems that have one of the usual floppy sizes (720k, 1.2M, 1.44M, 2.88M),
a 16 bit FAT otherwise. This can be overridden with the -F option. Some PC-specific
boot sector fields aren't written, and a boot message (option -m) is ignored.
Selects the location of the backup boot sector for FAT32. Default depends on number
of reserved sectors, but usually is sector 6. The backup must be within the range
of reserved sectors.
-c Check the device for bad blocks before creating the file system.
-C Create the file given as device on the command line, and write the to-be-created
file system to it. This can be used to create the new file system in a file instead
of on a real device, and to avoid using dd in advance to create a file of appropri-
ate size. With this option, the block-count must be given, because otherwise the
intended size of the file system wouldn't be known. The file created is a sparse
file, which actually only contains the meta-data areas (boot sector, FATs, and root
directory). The data portions won't be stored on the disk, but the file neverthe-
less will have the correct size. The resulting file can be copied later to a floppy
disk or other device, or mounted through a loop device.
Specify the number of file allocation tables in the file system. The default is 2.
Currently the Linux MS-DOS file system does not support more than 2 FATs.
Specifies the type of file allocation tables used (12, 16 or 32 bit). If nothing
is specified, mkdosfs will automatically select between 12 and 16 bit, whatever
fits better for the filesystem size. 32 bit FAT (FAT32 format) must (still) be
selected explicitly if you want it.
Sets the volume ID of the newly created filesystem; volume-id is a 32-bit hexadeci-
mal number (for example, 2e24ec82). The default is a number which depends on the
filesystem creation time.
-I Normally you are not allowed to use any 'full' fixed disk devices. mkdosfs will
complain and tell you that it refuses to work. This is different when usind MO
disks. One doesn't always need partitions on MO disks. The filesytem can go
directly to the whole disk. Under other OSes this is known as the 'superfloppy'
This switch will force mkdosfs to work properly.
Read the bad blocks list from filename.
Sets the message the user receives on attempts to boot this filesystem without hav-
ing properly installed an operating system. The message file must not exceed 418
bytes once line feeds have been converted to carriage return-line feed combina-
tions, and tabs have been expanded. If the filename is a hyphen (-), the text is
taken from standard input.
Sets the volume name (label) of the filesystem. The volume name can be up to 11
characters long. The default is no label.
Select the number of entries available in the root directory. The default is 112
or 224 for floppies and 512 for hard disks.
Select the number of reserved sectos. With FAT32 format at least 2 reserved sectors
are needed, the default is 32. Otherwise the default is 1 (only the boot sector).
Specify the number of disk sectors per cluster. Must be a power of 2, i.e. 1, 2,
4, 8, ... 128.
Specify the number of bytes per logical sector. Must be a power of 2 and greater
than or equal to 512, i.e. 512, 1024, 2048, 4096, 8192, 16384, or 32768.
-v Verbose execution.
None are know at the moment. If you find any, please report it them to
<email@example.com>. Please include the version number (Yggdrasil 0.3a).
Dave Hudson - <firstname.lastname@example.org>; modified by Peter Anvin <email@example.com>.
Fixes and additions by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> for Debian/GNU
mkdosfs is based on code from mke2fs (written by Remy Card - <firstname.lastname@example.org>) which is
itself based on mkfs (written by Linus Torvalds - <email@example.com>).
Version 2.x 5 May 1995 MKDOSFS(8)