.\" 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. .\" .\" $FreeBSD: src/share/man/man9/cd.9,v 1.11.2.3 2002/04/15 06:06:40 trhodes Exp $ .\" .Dd October 10, 1998 .Dt CD 9 .Os .Sh NAME .Nm cd .Nd CDROM driver for the CAM SCSI subsystem .Sh DESCRIPTION The .Nm device driver provides a read only interface for CDROM drives .Tn ( SCSI type 5) and WORM drives .Tn ( SCSI type 4) that support CDROM type commands. 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. .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. This flag is currently unimplemented in the CAM .Nm driver. .It Dv CD_Q_BCD_TRACKS This flag is for broken drives that return the track numbers in packed BCD instead of straight decimal. If the drive seems to skip tracks (tracks 10-15 are skipped) then you have a drive that is in need of this flag. .It Dv CD_Q_NO_CHANGER This flag tells the driver that the device in question is not a changer. This is only necessary for a CDROM device with multiple luns that are not a part of a changer. .It Dv CD_Q_CHANGER This flag tells the driver that the given device is a multi-lun changer. In general, the driver will figure this out automatically when it sees a LUN greater than 0. Setting this flag only has the effect of telling the driver to run the initial read capacity command for LUN 0 of the changer through the changer scheduling code. .El .Sh FILES .Bl -tag -width /sys/bus/cam/scsi/scsi_cd.c -compact .It Pa /sys/bus/cam/scsi/scsi_cd.c is the driver source file. .El .Sh SEE ALSO .Xr cd 4 , .Xr scsi 4 .Sh HISTORY The .Nm manual page first appeared in .Fx 2.2 . .Sh AUTHORS .An -nosplit This manual page was written by .An John-Mark Gurney Aq Mt gurney_j@efn.org . It was updated for CAM and .Fx 3.0 by .An Kenneth Merry Aq Mt ken@FreeBSD.org .