239 lines
5.8 KiB
Groff
239 lines
5.8 KiB
Groff
.\" Copyright (c) 1997 Junichi Satoh
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the author nor the names of any co-contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY FreeBSD, Inc. AND CONTRIBUTORS ``AS IS''
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.\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL FreeBSD, Inc. OR CONTRIBUTORS BE
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.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd January 16, 1998
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.Dt WFD 4 i386
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.Os FreeBSD
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.Sh NAME
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.Nm wfd
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.Nd ATAPI floppy driver (LS-120 floppy driver)
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.Sh SYNOPSIS
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.Cd options ATAPI
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.Cd options ATAPI_STATIC
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.Cd device wfd0
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.Pp
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for
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.Em ATAPI
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floppy disks, typically LS-120 style 120mb/1.4mb floppy drives.
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In general the interfaces are similar to those described by
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.Xr wd 4 .
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.Pp
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As the IDE controllers are probed during boot, the
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.Em IDE
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buses are scanned for devices. Any devices found which answered as
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.Sq Em Floppy
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and
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.Sq Em removable
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type device will be attached to the
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.Nm
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driver.
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The first device found will be attached as
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.Em wfd0
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and the next,
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.Em wfd1 ,
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and so on.
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.Pp
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When used with a LS-120 drive, this driver will read/write the following
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types of floppy disk:
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.Bl -tag -width 1.25MB -compact
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.It 120mb
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.It 1.44mb
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.It 1.25mb (PC-9801 series format)
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.It 1.2mb
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.It 720kb
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.El
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.Sh PARTITIONING
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The
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.Nm
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driver allows the disk to have two levels of partitioning.
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One layer, called the
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.Dq slice layer ,
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is used to separate the
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.Tn FreeBSD
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areas of the disk from areas used by other operating systems.
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The second layer is the native
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.Bx 4.4
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partitioning scheme,
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.Xr disklabel 5 ,
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which is used to subdivide the
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.Tn FreeBSD
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slices into areas for individual filesystems.
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For more information, see
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.Xr fdisk 8
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and
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.Xr disklabel 8 ,
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respectively.
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.Pp
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If an uninitialized disk is opened, the slice table will be
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initialized with a fictitious
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.Tn FreeBSD
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slice spanning the entire disk. Similarly, if an uninitialized
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(or
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.No non- Ns Tn FreeBSD )
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slice is opened, its disklabel will be initialized with parameters
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returned by the drive and a single
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.Sq Li c
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partition encompassing the entire slice.
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.Sh EXAMPLES
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Making LS-120/ZIP disks can be a bit more complicated than usual depending
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upon whether or not you chose to use the slice code or not.
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LS-120 floppies are typically considered floppy devices and do not carry
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a slice table. On the other hand, Zip disks, which use the same driver,
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are considered hard disks by the vendor, so for compatibility, you should
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use a slice table.
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.Pp
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The driver will handle either type of disk with or without a slice
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table, but for compatibility, you should generally create disks
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that follow the vendor's behavior.
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.Pp
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To create a UFS LS-120 disk (no slice table),
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First, make sure there is no slice table on the disk):
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.Dl # dd if=/dev/zero of=/dev/wfd0 count=16
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Next, disklabel the disk:
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.Dl # disklabel -rw wfd0 fd120m
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Then newfs as usual:
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.Dl # newfs /dev/rwfd0a
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.Fi
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To create a standard 1.44mb floppy in a LS-120 drive, do the same
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procedure, but use
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.Ar fd1440
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as the disk layout when using the
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.Nm disklabel
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command.
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.Sh KERNEL CONFIGURATION
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Only one
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.Nm
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device is necessary in the config file; data structures are dynamically
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allocated as disks are found on the
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.Tn IDE
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buses.
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.Sh NOTES
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This driver is attached to the
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.Xr wdc 4
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IDE/ATAPI disk controller driver. It will not work unless
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IDE controllers have been configured and enabled in the kernel.
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.Sh BUGS
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Floppy formatting is not yet supported.
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.Pp
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This driver is still a beta version.
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If you have problems, please report them to
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.Aq bugs@FreeBSD.org
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and the author.
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.Sh FILES
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.Bl -tag -width /dev/rwfdXXXXX -compact
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.It Pa /dev/rwfd Ns Ar u
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raw mode
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.Tn ATAPI
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floppy
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.Ar u ,
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accessed as an unpartitioned device
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.Sm off
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.It Pa /dev/wfd Ar u Pa s Ar n
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.Sm on
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block mode
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.Tn ATAPI
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floppy disk unit
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.Ar u ,
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slice
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.Ar n ,
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accessed as an unpartitioned device
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.Sm off
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.It Pa /dev/rwfd Ar u Pa s Ar n
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.Sm on
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raw mode
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.Tn ATAPI
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floppy disk unit
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.Ar u ,
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slice
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.Ar n ,
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accessed as an unpartitioned device
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.It Pa /dev/wfd Ns Ar u Ns Ar p
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block mode
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.Tn ATAPI
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floppy disk unit
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.Ar u ,
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first
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.Tn FreeBSD
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slice, partition
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.Ar p
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.It Pa /dev/rwfd Ns Ar u Ns Ar p
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raw mode
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.Tn ATAPI
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floppy disk unit
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.Ar u ,
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first
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.Tn FreeBSD
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slice, partition
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.Ar p
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.Sm off
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.It Xo
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.Pa /dev/wfd Ar u Pa s Ar n Ar p
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.Xc
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.Sm on
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block mode
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.Tn ATAPI
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floppy disk unit
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.Ar u ,
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.No Ar n Ns th
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slice, partition
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.Ar p
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.Sm off
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.It Xo
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.Pa /dev/rwfd Ar u Pa s Ar n Ar p
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.Xc
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.Sm on
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raw mode
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.Tn ATAPI
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floppy disk unit
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.Ar u ,
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.No Ar n Ns th
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slice, partition
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.Ar p
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.El
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.Sh SEE ALSO
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.Xr wcd 4 ,
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.Xr wd 4 ,
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.Xr disklabel 5 ,
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.Xr disklabel 8 ,
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.Xr fdisk 8
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.Sh AUTHORS
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.An Junichi\ Satoh\ Aq junichi@jp.FreeBSD.org
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 2.2.6 .
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