FDFORMAT(1) User Commands FDFORMAT(1)


NAME


fdformat - format floppy diskette or PCMCIA memory card

SYNOPSIS


fdformat [-dDeEfHlLmMUqvx] [-b label] [-B filename]
[-t dostype] [devname]


DESCRIPTION


The fdformat utility has been superseded by rmformat(1), which provides
most but not all of fdformat's functionality.


fdformat is used to format diskettes and PCMCIA memory cards. All new
blank diskettes or PCMCIA memory cards must be formatted before they can
be used.


fdformat formats and verifies the media and indicates whether any bad
sectors were encountered. All existing data on the diskette or PCMCIA
memory card, if any, is destroyed by formatting. If no device name is
given, fdformat uses the diskette as a default.


By default, fdformat uses the configured capacity of the drive to format
the diskette. A 3.5 inch high-density drive uses diskettes with a
formatted capacity of 1.44MB. A 5.25 inch high-density drive uses
diskettes with a formatted capacity of 1.2MB. In either case, a density
option does not have to be specified to fdformat. However, a density
option must be specified when using a diskette with a lower capacity than
the drive's default. Use the -H option to format high-density diskettes
(1.44MB capacity) in an extra-high-density (ED) drive. Use the -D option,
the -l option, or the -L option to format double- density (or low-
density) diskettes (720KB capacity) in an HD or ED drive. To format
medium-density diskettes (1.2MB capacity), use the -M option with -t nec
(this is the same as using the -m option with -t nec).


Extended density uses double-sided, extended-density or extra-high-
density (DS/ED) diskettes. Medium and high densities use the same media:
double-sided, high-density (DS/HD) diskettes. Double (low) density uses
double-sided, double-density (DS/DD


D) diskettes. Substituting diskettes of one density for diskettes of
either a higher or lower density generally does not work. Data integrity
cannot be assured whenever a diskette is formatted to a capacity not
matching its density.


A PCMCIA memory card with densities from 512KB to 64MB may be formatted.


fdformat writes new identification and data fields for each sector on all
tracks unless the -x option is specified. For diskettes, each sector is
verified if the -v option is specified.


After formatting and verifying, fdformat writes an operating-system label
on block 0. Use the -t dos option (same as the -d option) to put an MS-
DOS file system on the diskette or PCMCIA memory card after the format is
done. Use the -t nec option with the -M option (same as the -m option) to
put an NEC-DOS file system on a diskette. Otherwise, fdformat writes a
SunOS label in block 0.

OPTIONS


The following options are supported:

-b label
Labels the media with volume label. A SunOS volume label
is restricted to 8 characters. A DOS volume label is
restricted to 11 upper-case characters.


-B filename
Installs special boot loader in filename on an MS-DOS
diskette. This option is only meaningful when the -d
option (or -t dos) is also specified.


-D
Formats a 720KB (3.5 inch) or 360KB (5.25 inch) double-
density diskette (same as the -l or -L options). This is
the default for double-density type drives. It is needed
if the drive is a high- or extended-density type.


-e
Ejects the diskette when done. This feature is not
available on all systems.


-E
Formats a 2.88MB (3.5 inch) extended-density diskette.
This is the default for extended-density type drives.


-f
Forces formatting, that is, this option does not ask for
confirmation before starting format.


-H
Formats a 1.44MB (3.5 inch) or 1.2MB (5.25 inch) high-
density diskette. This is the default for high-density
type drives; it is needed if the drive is the extended-
density type.


-M
Writes a 1.2MB (3.5 inch) medium-density format on a high-
density diskette (use only with the -t nec option). This
is the same as using -m.

This feature is not available on all systems.


-q
Quiet; does not print status messages.


-t dos
Installs an MS-DOS file system and boot sector formatting.
This is equivalent to the DOS format command or the -d
option.


-t nec
Installs an NEC-DOS file system and boot sector on the
disk after formatting. This should be used only with the
-M option. This feature is not available on all systems.


-U
Performs umount on any file systems and then formats. See
mount(1M).


-v
Verifies each block of the diskette after the format.


-x
Skips the format and only writes a SunOS label or an MS-
DOS file system.


OPERANDS


The following operands are supported:

devname
Replaces devname with rdiskette0 (systems without volume
management) or floppy0 (systems with volume management) to use
the first drive or rdiskette1 (systems without volume
management) or floppy1 (systems with volume management) to use
the second drive. If devname is omitted, the first drive, if
one exists, is used. For PCMCIA memory cards, replace devname
with the device name for the PCMCIA memory card which resides
in /dev/rdsk/cNtNdNsN or /dev/dsk/cNtNdNsN. If devname is
omitted, the default diskette drive, if one exists, is used.

If devname is omitted, the default diskette drive, if one
exists, will be used. N represents a decimal number and can
be specified as follows:

cN
Controller N


tN
Technology type N:


0x1 ROM
0x2 OTPROM
0x3 EPROM
0x4 EEPROM
0x5 FLASH
0x6 SRAM
0x7 DRAM


dN
Technology region in type N.


sN
Slice N.

The following options are provided for compatibility with
previous versions of fdformat. Their use is discouraged.

-d
Formats an MS-DOS floppy diskette or PCMCIA memory card
(same as -t dos). This is equivalent to the MS-DOS
FORMAT command.


-l
Formats a 720KB (3.5 inch) or 360KB (5.25 inch) double-
density diskette (same as -D or -L). This is the default
for double-density type drives; it is needed if the
drive is the high- or extended-density type.


-L
Formats a 720KB (3.5 inch) or 360KB (5.25 inch) double-
density diskette (same as -l or -D). This is the default
for double-density type drives.


-m
Writes a 1.2 MB (3.5 inch) medium- density format on a
high-density diskette (use only with the -t nec option).
This is the same as using -M. This feature is not
available on all systems.


FILES


/dev/diskette0
Directory providing block device access for the
media in floppy drive 0.


/dev/diskette0
Directory providing character device access for
the media in floppy drive 0.


/dev/aliases/floppy0
Symbolic link to the character device for the
media in floppy drive 0.


/dev/rdiskette
Directory providing character device access for
the media in the primary floppy drive, usually
drive 0.


/dev/dsk/cNtNdNsN
Directory providing block device access for the
PCMCIA memory card. See OPERANDS for a
description of N.


/dev/rdsk/cNtNdNsN
Directory providing character device access for
the PCMCIA memory card. See OPERANDS for a
description of N.


/dev/aliases/pcmemS
Symbolic link to the character device for the
PCMCIA memory card in socket S where S represents
a PCMCIA socket number.


/dev/rdsk/cNtNdNsN
Directory providing character device access for
the PCMCIA memory card. See OPERANDS for a
description of N.


/dev/dsk/cNtNdNsN
Directory providing block device access for the
PCMCIA memory card. See OPERANDS for a
description of N.


SEE ALSO


cpio(1), eject(1), rmformat(1), tar(1), volcheck(1), volrmmount(1),
mount(1M), newfs(1M), prtvtoc(1M), attributes(5), pcfs(7FS)

x86 Only
fd(7D)

NOTES


A diskette or PCMCIA memory card containing a ufs file system created on
a SPARC based system (by using fdformat and newfs(1M)), is not identical
to a diskette or PCMCIA memory card containing a ufs file system created
on an x86 based system. Do not interchange ufs diskettes or memory cards
between these platforms. Use cpio(1) or tar(1) to transfer files on
diskettes or memory cards between them. A diskette or PCMCIA memory card
formatted using the -t dos option (or -d) for MS-DOS does not have the
necessary system files, and is therefore not bootable. Trying to boot
from it on a PC produces the following message:

Non-System disk or disk error.
Replace and strike any key when ready


BUGS


Currently, bad sector mapping is not supported on floppy diskettes or
PCMCIA memory cards. Therefore, a diskette or memory card is unusable if
fdformat finds an error (bad sector).


February 28, 2007 FDFORMAT(1)