ufiformat - Format a USB floppy disk.
ufiformat [ -hiqv ] [ -f|--format [size]] [ devicepath ]
-f, --format [size]
Specify format capacity SIZE in KB. Without -f option, the
format of the current media will be used.
Do not perform any safety checks.
Show device information, instead of performing format. Without
devicepath argument, list all USB floppy disk devices attached
to the system.
Suppress minor diagnostics.
Show help message.
ufiformat is a raw level formatting disk utility for USB floppy
Raw level format is to write gap,index,sectors to the unformatted disk
using special commands specific to the disk controller, to make the
plain magneto-sensitive film into sector-addressable medium. Note that
raw level format is NOT about creating filesystems (fs(5)) on the disk.
After mid-1990’s, floppy disks are sold generally pre-formatted in MS-
DOS 2HD format: 80 cylinder, 2 heads, 18 sectors/track, 512
bytes/sector; it is seldom in need for raw formatting. Nevertheless
raw formatting could cure some disk and drive mismatchings.
WARNING: You will NOT raw format an LS-120 disks or (removable) hard
disks; they are precision formatted in factory and cannot be raw
ufiformat supports only the following format capacities:
1440/1232/1200 (for 2HD disk)
720/640 (for 2DD disk)
The device should support the capacities also, otherwise ufiformat
shows an error message.
The above format capacities are predefined in the program, but each USB
floppy device also has a limited set of formats (defined internally)
that it can format media to. The allowed format capacities are
obtained by querying (-i) the device, but this only returns the total
format capacity and not CHS (cylinder, heads and sectors), hence a
mapping is required in the program.
Inquiry the device for available format:
# modprobe sg
# ufiformat -i /dev/sda
vendor: Y-E DATA
write protect: off
media type: 2HD
status block size kb
formatted 2880 512 1440
formattable 2880 512 1440
formattable 1232 1024 1232
formattable 2400 512 1200
Format the floppy disk in 1.44MB, and create a FAT filesystem:
# ufiformat -f 1440 /dev/sda
# mkdosfs -I /dev/sda
ufiformat needs /dev/sg* SCSI pass-thru device to operate. If the
device does not exist, add the driver by invoking modprobe sg.
You often need to be root to do anything with /dev/sd*.
fdformat(8), floppy(8), sg(4)
"Universal Serial Bus Mass Storage Class - UFI Command Specification"
Revision 1.0 December 14 1998