113 lines
3.7 KiB
Groff
113 lines
3.7 KiB
Groff
|
.\" Copyright (c) 2002
|
||
|
|
.\" Thomas Quinot <thomas@FreeBSD.org>. 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 THE AUTHOR 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 THE VOICES IN HIS HEAD
|
||
|
|
.\" 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.
|
||
|
|
.\"
|
||
|
|
.\" $FreeBSD$
|
||
|
|
.\"
|
||
|
|
.Dd October 23, 2002
|
||
|
|
.Dt ATAPICAM 4
|
||
|
|
.Os
|
||
|
|
.Sh NAME
|
||
|
|
.Nm atapicam
|
||
|
|
.Nd CAM XPT (transport) module for ATAPI devices
|
||
|
|
.Sh SYNOPSIS
|
||
|
|
.Cd "device atapicam"
|
||
|
|
.Sh DESCRIPTION
|
||
|
|
The ATAPI/CAM module allows ATAPI devices (CD-ROM, CD-RW, DVD drives,
|
||
|
|
floppy drives such as Iomega Zip, tape drives) to be accessed through
|
||
|
|
the SCSI subsystem (CAM).
|
||
|
|
.Pp
|
||
|
|
.Nm ata
|
||
|
|
and
|
||
|
|
.Nm scbus
|
||
|
|
must be configured in the kernel as well.
|
||
|
|
The SCSI target drivers
|
||
|
|
.Pq Nm cd , Nm da , No or Nm st
|
||
|
|
can then be used to access the devices.
|
||
|
|
The generic passthrough device
|
||
|
|
.Nm pass
|
||
|
|
can also be used to send SCSI commands directly
|
||
|
|
to the devices through the CAM API.
|
||
|
|
.Pp
|
||
|
|
A separate CAM bus is created for each ATA bus in the system.
|
||
|
|
On each of these buses, target id 0 is assigned to the master
|
||
|
|
device, and id 1 is assigned to the slave
|
||
|
|
.Pq provided they are ATAPI devices .
|
||
|
|
.Sh IMPLEMENTATION NOTES
|
||
|
|
Some SCSI commands are intercepted by the driver, and undergo special
|
||
|
|
processing in order to work around limitations of ATAPI devices.
|
||
|
|
Such limitations can be consequences of the ATAPI specification.
|
||
|
|
For example, ATAPI devices do not implement the 6-byte versions
|
||
|
|
of
|
||
|
|
.Nm MODE_SELECT ,
|
||
|
|
.Nm MODE_SENSE ,
|
||
|
|
.Nm READ ,
|
||
|
|
or
|
||
|
|
.Nm WRITE .
|
||
|
|
They can also be common bugs, such as hanging when queried for
|
||
|
|
extended
|
||
|
|
.Nm INQUIRY
|
||
|
|
information.
|
||
|
|
.Sh EXAMPLES
|
||
|
|
.Dl device atapicam
|
||
|
|
.Dl device scbus
|
||
|
|
.Dl device cd
|
||
|
|
.Dl device pass
|
||
|
|
.Pp
|
||
|
|
Add the
|
||
|
|
.Nm
|
||
|
|
driver to the kernel.
|
||
|
|
.Pp
|
||
|
|
.Dl camcontrol devlist
|
||
|
|
.Pp
|
||
|
|
Print the list of all devices available through CAM.
|
||
|
|
.Pp
|
||
|
|
.Dl mount -t cd9660 /dev/cd0c /mnt
|
||
|
|
.Pp
|
||
|
|
Mount a CD-ROM from an ATAPI CD-ROM drive
|
||
|
|
.Pq the command above assumes that the ATAPI drive is the only CD-ROM unit .
|
||
|
|
.Sh SEE ALSO
|
||
|
|
.Xr ata 4 ,
|
||
|
|
.Xr scsi 4 ,
|
||
|
|
.Xr atacontrol 8 ,
|
||
|
|
.Xr camcontrol 8
|
||
|
|
.Sh HISTORY
|
||
|
|
The ATAPI/CAM driver first appeared in
|
||
|
|
.Fx 5.0 .
|
||
|
|
.Sh AUTHORS
|
||
|
|
.An -nosplit
|
||
|
|
The ATAPI/CAM driver was written by
|
||
|
|
.An Thomas Quinot Aq thomas@FreeBSD.org .
|
||
|
|
.Sh BUGS
|
||
|
|
.Pp
|
||
|
|
.Nm
|
||
|
|
and ATAPI-specific target drivers
|
||
|
|
.Pq Nm acd , Nm ast , No and Nm afd
|
||
|
|
can be configured in the same kernel.
|
||
|
|
Simultaneous access to the same device through the SCSI generic drivers
|
||
|
|
and the ATAPI-specific drivers may cause problems and is strongly discouraged.
|
||
|
|
|