Various man pages describing the internals of the SCSI subsystem.

Submitted by:	John-Mark Gurney <gurney_j@resnet.uoregon.edu>

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+.\" Copyright (c) 1997
+.\"	John-Mark Gurney.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. Neither the name of the author nor the names of any co-contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY John-Mark Gurney AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"
+.Dd Febuary 1, 1997
+.Dt CD 4
+.Os FreeBSD
+.Sh NAME
+.Nm cd
+.Nd device driver for SCSI subsystem
+.Sh DESCRIPTION
+The cd device driver provies the 
+.Tn SCSI
+subsystem a way to handle type 5
+.Pq Dv T_READONLY
+media.  Some drives don't behave as the driver expects.  See the section
+QUIRKS for info on possible flags.
+.Sh QUIRKS
+Each
+.Tn CD-ROM
+device can have different interpretations of the
+.Tn SCSI
+spec.  This can lead to drives requiring special handling in the driver.  The
+following is a list of quirks that the driver recognize.  See
+.Xr scsiconf 9
+for more information on how to add quirk entries.
+.Bl -tag -width CD_Q_BCD_TRACKS
+.It Dv CD_Q_NO_TOUCH
+This flag tell the driver not to probe the drive at attach time to see if
+there is a disk in the drive and find out what size it is.
+.ig xx
+.It Dv CD_Q_BCD_TRACKS
+This flag is for broken drives that return the track numbers in packed BCD
+encoding instead of straight decimal.  If the drive seems to skip tracks
+.Pq usually tracks 10-15 are skipped
+then you have a drive that is in need of this flag.
+.xx
+.El
+.Sh FILES
+.Bl -tag -width /sys/scsi/scsiconf.h -compact
+.It Pa /sys/scsi/cd.c
+files contains actual driver code
+.It Pa /sys/scsi/scsiconf.h
+contains the defines of the
+.Dv CD_Q_xxx
+quirk flags
+.El
+.Sh SEE ALSO
+.Xr cd 4 ,
+.Xr scsiconf 9
+.Sh HISTORY
+The
+.Nm
+manual page first appeared in
+.Fx 3.0 .
+.Sh AUTHOR
+This
+manual page was written by John-Mark Gurney
+.Aq gurney_j@efn.org .