1.\" Copyright (c) 1997 2.\" John-Mark Gurney. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the author nor the names of any co-contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY John-Mark Gurney AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" $FreeBSD: src/share/man/man9/cd.9,v 1.11.2.3 2002/04/15 06:06:40 trhodes Exp $ 29.\" $DragonFly: src/share/man/man9/cd.9,v 1.2 2003/06/17 04:37:01 dillon Exp $ 30.\" 31.Dd October 10, 1998 32.Dt CD 9 33.Os 34.Sh NAME 35.Nm cd 36.Nd CDROM driver for the CAM SCSI subsystem 37.Sh DESCRIPTION 38The 39.Nm 40device driver provides a read only interface for CDROM drives 41.Tn ( SCSI 42type 5) 43and WORM drives 44.Tn ( SCSI 45type 4) 46that support CDROM type commands. 47Some drives don't behave as the driver expects. See the section 48QUIRKS for info on possible flags. 49.Sh QUIRKS 50Each 51.Tn CD-ROM 52device can have different interpretations of the 53.Tn SCSI 54spec. This can lead to drives requiring special handling in the driver. The 55following is a list of quirks that the driver recognize. 56.Bl -tag -width CD_Q_BCD_TRACKS 57.It Dv CD_Q_NO_TOUCH 58This flag tell the driver not to probe the drive at attach time to see if 59there is a disk in the drive and find out what size it is. This flag is 60currently unimplemented in the CAM 61.Nm 62driver. 63.It Dv CD_Q_BCD_TRACKS 64This flag is for broken drives that return the track numbers in packed BCD 65instead of straight decimal. If the drive seems to skip tracks 66(tracks 10-15 are skipped) 67then you have a drive that is in need of this flag. 68.It Dv CD_Q_NO_CHANGER 69This flag tells the driver that the device in question is not a changer. 70This is only necessary for a CDROM device with multiple luns that are not a 71part of a changer. 72.It Dv CD_Q_CHANGER 73This flag tells the driver that the given device is a multi-lun changer. 74In general, the driver will figure this out automatically when it sees a 75LUN greater than 0. Setting this flag only has the effect of telling the 76driver to run the initial read capacity command for LUN 0 of the changer 77through the changer scheduling code. 78.El 79.Sh FILES 80.Bl -tag -width /sys/cam/scsi/scsi_cd.c -compact 81.It Pa /sys/cam/scsi/scsi_cd.c 82is the driver source file. 83.El 84.Sh SEE ALSO 85.Xr cd 4 , 86.Xr scsi 4 87.Sh HISTORY 88The 89.Nm 90manual page first appeared in 91.Fx 2.2 . 92.Sh AUTHORS 93.An -nosplit 94This 95manual page was written by 96.An John-Mark Gurney Aq gurney_j@efn.org . 97It was updated for CAM and 98.Fx 3.0 99by 100.An Kenneth Merry Aq ken@FreeBSD.org . 101