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86 lines
3.0 KiB
Groff
86 lines
3.0 KiB
Groff
.\" Copyright (c) 1997
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.\" John-Mark Gurney. 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 John-Mark Gurney AND CONTRIBUTORS ``AS IS'' AND
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.\" 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 THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $Id: cd.9,v 1.6 1997/04/02 09:41:16 jmg Exp $
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.\"
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.Dd February 1, 1997
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.Dt CD 9
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.Os FreeBSD
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.Sh NAME
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.Nm cd
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.Nd device driver for SCSI subsystem
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.Sh DESCRIPTION
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The
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.Nm
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device driver provides the
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.Tn SCSI
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subsystem a way to handle type 5
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.Pq Dv T_READONLY
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media. Some drives don't behave as the driver expects. See the section
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QUIRKS for info on possible flags.
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.Sh QUIRKS
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Each
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.Tn CD-ROM
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device can have different interpretations of the
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.Tn SCSI
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spec. This can lead to drives requiring special handling in the driver. The
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following is a list of quirks that the driver recognize. See
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.Xr scsiconf 9
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for more information on how to add quirk entries.
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.Bl -tag -width CD_Q_BCD_TRACKS
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.It Dv CD_Q_NO_TOUCH
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This flag tell the driver not to probe the drive at attach time to see if
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there is a disk in the drive and find out what size it is.
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.It Dv CD_Q_BCD_TRACKS
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This flag is for broken drives that return the track numbers in packed BCD
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instead of straight decimal. If the drive seems to skip tracks
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.Pq tracks 10-15 are skipped
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then you have a drive that is in need of this flag.
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.El
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.Sh FILES
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.Bl -tag -width /sys/scsi/scsiconf.h -compact
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.It Pa /sys/scsi/cd.c
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files contains actual driver code
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.It Pa /sys/scsi/scsiconf.h
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contains the defines of the
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.Dv CD_Q_xxx
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quirk flags
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.El
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.Sh SEE ALSO
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.Xr cd 4 ,
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.Xr scsi 4 ,
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.Xr scsiconf 9
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.Sh HISTORY
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The
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.Nm
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manual page first appeared in
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.Fx 2.2 .
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.Sh AUTHORS
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This
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manual page was written by
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.An John-Mark Gurney Aq gurney_j@efn.org .
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