+++ /dev/null
-'\" t
-.\" Copyright (c) 1993 Michael Haardt (michael@cantor.informatik.rwth-aachen.de)
-.\" and 1994,1995 Alain Knaff (Alain.Knaff@imag.fr)
-.\"
-.\" %%%LICENSE_START(GPLv2+_DOC_FULL)
-.\" This is free documentation; you can redistribute it and/or
-.\" modify it under the terms of the GNU General Public License as
-.\" published by the Free Software Foundation; either version 2 of
-.\" the License, or (at your option) any later version.
-.\"
-.\" The GNU General Public License's references to "object code"
-.\" and "executables" are to be interpreted as the output of any
-.\" document formatting or typesetting system, including
-.\" intermediate and printed output.
-.\"
-.\" This manual is distributed in the hope that it will be useful,
-.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
-.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-.\" GNU General Public License for more details.
-.\"
-.\" You should have received a copy of the GNU General Public
-.\" License along with this manual; if not, see
-.\" <http://www.gnu.org/licenses/>.
-.\" %%%LICENSE_END
-.\"
-.\" Modified, Sun Feb 26 15:00:02 1995, faith@cs.unc.edu
-.\"
-.TH FD 4 2014-05-10 "Linux" "Linux Programmer's Manual"
-.SH NAME
-fd \- floppy disk device
-.SH CONFIGURATION
-Floppy drives are block devices with major number 2.
-Typically they
-are owned by
-.I root.floppy
-(i.e., user root, group floppy) and have
-either mode 0660 (access checking via group membership) or mode 0666
-(everybody has access).
-The minor
-numbers encode the device type, drive number, and controller number.
-For each device type (that is, combination of density and track count)
-there is a base minor number.
-To this base number, add the drive's
-number on its controller and 128 if the drive is on the secondary
-controller.
-In the following device tables, \fIn\fP represents the
-drive number.
-.PP
-\fBWarning: If you use formats with more tracks
-than supported by your drive, you may cause it mechanical damage.\fP
-Trying once if more tracks than the usual 40/80 are supported should not
-damage it, but no warranty is given for that.
-If you are not sure, don't create device
-entries for those formats, so as to prevent their usage.
-.PP
-Drive-independent device files which automatically detect the media
-format and capacity:
-.TS
-l l.
-Name Base minor #
-_
-\fBfd\fP\fIn\fP 0
-.TE
-.PP
-5.25 inch double-density device files:
-.TS
-lw(1i) l l l l l.
-Name Capac. Cyl. Sect. Heads Base minor #
-_
-\fBfd\fP\fIn\fP\fBd360\fP 360K 40 9 2 4
-.TE
-.PP
-5.25 inch high-density device files:
-.TS
-lw(1i) l l l l l.
-Name Capac. Cyl. Sect. Heads Base minor #
-_
-\fBfd\fP\fIn\fP\fBh360\fP 360K 40 9 2 20
-\fBfd\fP\fIn\fP\fBh410\fP 410K 41 10 2 48
-\fBfd\fP\fIn\fP\fBh420\fP 420K 42 10 2 64
-\fBfd\fP\fIn\fP\fBh720\fP 720K 80 9 2 24
-\fBfd\fP\fIn\fP\fBh880\fP 880K 80 11 2 80
-\fBfd\fP\fIn\fP\fBh1200\fP 1200K 80 15 2 8
-\fBfd\fP\fIn\fP\fBh1440\fP 1440K 80 18 2 40
-\fBfd\fP\fIn\fP\fBh1476\fP 1476K 82 18 2 56
-\fBfd\fP\fIn\fP\fBh1494\fP 1494K 83 18 2 72
-\fBfd\fP\fIn\fP\fBh1600\fP 1600K 80 20 2 92
-.TE
-.PP
-3.5 inch double-density device files:
-.TS
-lw(1i) l l l l l.
-Name Capac. Cyl. Sect. Heads Base minor #
-_
-\fBfd\fP\fIn\fP\fBu360\fP 360K 80 9 1 12
-\fBfd\fP\fIn\fP\fBu720\fP 720K 80 9 2 16
-\fBfd\fP\fIn\fP\fBu800\fP 800K 80 10 2 120
-\fBfd\fP\fIn\fP\fBu1040\fP 1040K 80 13 2 84
-\fBfd\fP\fIn\fP\fBu1120\fP 1120K 80 14 2 88
-.TE
-.PP
-3.5 inch high-density device files:
-.TS
-lw(1i) l l l l l.
-Name Capac. Cyl. Sect. Heads Base minor #
-_
-\fBfd\fP\fIn\fP\fBu360\fP 360K 40 9 2 12
-\fBfd\fP\fIn\fP\fBu720\fP 720K 80 9 2 16
-\fBfd\fP\fIn\fP\fBu820\fP 820K 82 10 2 52
-\fBfd\fP\fIn\fP\fBu830\fP 830K 83 10 2 68
-\fBfd\fP\fIn\fP\fBu1440\fP 1440K 80 18 2 28
-\fBfd\fP\fIn\fP\fBu1600\fP 1600K 80 20 2 124
-\fBfd\fP\fIn\fP\fBu1680\fP 1680K 80 21 2 44
-\fBfd\fP\fIn\fP\fBu1722\fP 1722K 82 21 2 60
-\fBfd\fP\fIn\fP\fBu1743\fP 1743K 83 21 2 76
-\fBfd\fP\fIn\fP\fBu1760\fP 1760K 80 22 2 96
-\fBfd\fP\fIn\fP\fBu1840\fP 1840K 80 23 2 116
-\fBfd\fP\fIn\fP\fBu1920\fP 1920K 80 24 2 100
-.TE
-.PP
-3.5 inch extra-density device files:
-.TS
-lw(1i) l l l l l.
-Name Capac. Cyl. Sect. Heads Base minor #
-_
-\fBfd\fP\fIn\fP\fBu2880\fP 2880K 80 36 2 32
-\fBfd\fP\fIn\fP\fBCompaQ\fP 2880K 80 36 2 36
-\fBfd\fP\fIn\fP\fBu3200\fP 3200K 80 40 2 104
-\fBfd\fP\fIn\fP\fBu3520\fP 3520K 80 44 2 108
-\fBfd\fP\fIn\fP\fBu3840\fP 3840K 80 48 2 112
-.TE
-.SH DESCRIPTION
-\fBfd\fP special files access the floppy disk drives in raw mode.
-The following
-.BR ioctl (2)
-calls are supported by \fBfd\fP devices:
-.IP \fBFDCLRPRM\fP
-clears the media information of a drive (geometry of disk in drive).
-.IP \fBFDSETPRM\fP
-sets the media information of a drive.
-The media information will be
-lost when the media is changed.
-.IP \fBFDDEFPRM\fP
-sets the media information of a drive (geometry of disk in drive).
-The media information will not be lost when the media is changed.
-This will disable autodetection.
-In order to reenable autodetection, you
-have to issue an \fBFDCLRPRM\fP.
-.IP \fBFDGETDRVTYP\fP
-returns the type of a drive (name parameter).
-For formats which work
-in several drive types, \fBFDGETDRVTYP\fP returns a name which is
-appropriate for the oldest drive type which supports this format.
-.IP \fBFDFLUSH\fP
-invalidates the buffer cache for the given drive.
-.IP \fBFDSETMAXERRS\fP
-sets the error thresholds for reporting errors, aborting the operation,
-recalibrating, resetting, and reading sector by sector.
-.IP \fBFDSETMAXERRS\fP
-gets the current error thresholds.
-.IP \fBFDGETDRVTYP\fP
-gets the internal name of the drive.
-.IP \fBFDWERRORCLR\fP
-clears the write error statistics.
-.IP \fBFDWERRORGET\fP
-reads the write error statistics.
-These include the total number of
-write errors, the location and disk of the first write error, and the
-location and disk of the last write error.
-Disks are identified by a
-generation number which is incremented at (almost) each disk change.
-.IP \fBFDTWADDLE\fP
-Switch the drive motor off for a few microseconds.
-This might be
-needed in order to access a disk whose sectors are too close together.
-.IP \fBFDSETDRVPRM\fP
-sets various drive parameters.
-.IP \fBFDGETDRVPRM\fP
-reads these parameters back.
-.IP \fBFDGETDRVSTAT\fP
-gets the cached drive state (disk changed, write protected et al.)
-.IP \fBFDPOLLDRVSTAT\fP
-polls the drive and return its state.
-.IP \fBFDGETFDCSTAT\fP
-gets the floppy controller state.
-.IP \fBFDRESET\fP
-resets the floppy controller under certain conditions.
-.IP \fBFDRAWCMD\fP
-sends a raw command to the floppy controller.
-.PP
-For more precise information, consult also the \fI<linux/fd.h>\fP and
-\fI<linux/fdreg.h>\fP include files, as well as the
-.BR floppycontrol (1)
-manual page.
-.SH FILES
-/dev/fd*
-.SH NOTES
-The various formats permit reading and writing many types of disks.
-However, if a floppy is formatted with an inter-sector gap that is too small,
-performance may drop,
-to the point of needing a few seconds to access an entire track.
-To prevent this, use interleaved formats.
-
-It is not possible to
-read floppies which are formatted using GCR (group code recording),
-which is used by Apple II and Macintosh computers (800k disks).
-
-Reading floppies which are hard sectored (one hole per sector, with
-the index hole being a little skewed) is not supported.
-This used to be common with older 8-inch floppies.
-.\" .SH AUTHORS
-.\" Alain Knaff (Alain.Knaff@imag.fr), David Niemi
-.\" (niemidc@clark.net), Bill Broadhurst (bbroad@netcom.com).
-.SH SEE ALSO
-.BR chown (1),
-.BR floppycontrol (1),
-.BR getfdprm (1),
-.BR mknod (1),
-.BR superformat (1),
-.BR mount (8),
-.BR setfdprm (8)
-.SH COLOPHON
-This page is part of release 3.79 of the Linux
-.I man-pages
-project.
-A description of the project,
-information about reporting bugs,
-and the latest version of this page,
-can be found at
-\%http://www.kernel.org/doc/man\-pages/.
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