readme.xxxbsd

创建一个符合iso-9660标准的iso文件系统

Cdrecord has not been tested on OpenBSD jet. 
It should run anyhow because the differences between the *BSD 
systems should not be that big.

The current *BSD port will not yet be able to scan the SCSI bus
for a CD-Recorder as it is on other architectures.

User level SCSI seems not be be well tested on *BSD

It would be nice if the kernel hackers of all *BSD flavors could agree in
adding decent and useful SCSI user land transport support.
This would cause the following changes:

	-	Add a driver that is present by default and offeres an
		easy to address interface to the /dev/ namespace.
	-	Create device file entries for this driver by default.
	-	allow to send all commands on this driver even if the main
		driver entry is in use, At least allow:
			INQUIRY
			TEST_UNIT_READY
			REQUEST_SENSE
		to be able to scan the SCSI bus for drives.

NOTE: This changed with FreeBSD/cam cdrecord -scanbus works on FreeBSD/cam

Workaround:

If /dev/su0-0-0 ... does not exist on your system, you may try
to create the devices with the MAKEDEV.su script below.

There is no way to get the device node entry from the numerical target
specification on *BSD. You must specify the appropriate device node name:
e.g. dev=/dev/cd0.ctl:6,0 together with the numerical target specification.
A short form is:

	dev=/dev/cd0.ctl:@

But this syntax may not work on all *BSD flavours as not all *BSD flavours
support mapping back the target/lun numbers from a device.

In any case: read the cdrecord man page and try to find the /dev/* entry for
your CD-recorder that allows to be used with ioctl's.

On FreeBSD/cam, you will be able to access the CD-Recorder as on other
systems. If your CD-Recorder is on SCSI Bus 0, Target 2, lun 0
type:

cdrecord dev=0,2,0 .....

J鰎g

------------------------- MAKEDEV.su------------------
#!/bin/sh

#
# You must check which minor base is really needed for your system
# The su driver seems not to be well tested on *BSD
#
# If nothing else helps, create a link /dev/scgx to the right
# /dev/ entry (an entry that responds right with /sbin/scsi)
# for your needed device.
#
minorbase="536870912 + 2"
#minorbase="0"
#minorbase="0 + 2"
#minorbase="0 + 3"

mknod /dev/su0-0-0 c 18 `expr $minorbase + 0 '*' 8`
mknod /dev/su0-1-0 c 18 `expr $minorbase + 1 '*' 8`
mknod /dev/su0-2-0 c 18 `expr $minorbase + 2 '*' 8`
mknod /dev/su0-3-0 c 18 `expr $minorbase + 3 '*' 8`
mknod /dev/su0-4-0 c 18 `expr $minorbase + 4 '*' 8`
mknod /dev/su0-5-0 c 18 `expr $minorbase + 5 '*' 8`
mknod /dev/su0-6-0 c 18 `expr $minorbase + 6 '*' 8`
mknod /dev/su0-7-0 c 18 `expr $minorbase + 7 '*' 8`

mknod /dev/su1-0-0 c 18 `expr $minorbase + 1 '*' 64 + 0 '*' 8`
mknod /dev/su1-1-0 c 18 `expr $minorbase + 1 '*' 64 + 1 '*' 8`
mknod /dev/su1-2-0 c 18 `expr $minorbase + 1 '*' 64 + 2 '*' 8`
mknod /dev/su1-3-0 c 18 `expr $minorbase + 1 '*' 64 + 3 '*' 8`
mknod /dev/su1-4-0 c 18 `expr $minorbase + 1 '*' 64 + 4 '*' 8`
mknod /dev/su1-5-0 c 18 `expr $minorbase + 1 '*' 64 + 5 '*' 8`
mknod /dev/su1-6-0 c 18 `expr $minorbase + 1 '*' 64 + 6 '*' 8`
mknod /dev/su1-7-0 c 18 `expr $minorbase + 1 '*' 64 + 7 '*' 8`