Recipe 11.2. Finding the SCSI Address for CD and DVD Writers
11.2.1 Problem
You're using a 2.4
kernel and want to write a CD or DVD. You need to know the SCSI bus
address, or dev= number, for your CD/DVD writer.
11.2.2 Solution
cdrecord -scanbus will find it for you. This is what a
CD/DVD-ROM and a CD writer on a single system look like:
$ cdrecord -scanbus
Cdrecord 1.10 (i686-pc-linux-gnu) Copyright (C) 1995-2001 Jrg Schilling
Linux sg driver version: 3.1.24
Using libscg version 'schily-0.5'
scsibus0:
0,0,0 0) 'TOSHIBA ' 'DVD-ROM SD-M1202' '1020' Removable CD-ROM
0,1,0 1) 'LITE-ON ' 'LTR-24102B ' '5S54' Removable CD-ROM
0,2,0 2) *
0,3,0 3) *
0,4,0 4) *
0,5,0 5) *
0,6,0 6) *
0,7,0 7) *
DVD writers look like this:
1,2,0 2) 'PIONEER ' 'DVD-ROM DVD-303 ' '1.09' Removable CD-ROM
The first three numbers for each item refer to the SCSI bus, device
ID, and LUN (Logical Unit Number), respectively. The fourth number is
the device ID again. cdrecord wants the first
three numbers, like this:
dev=0,1,0
11.2.3 Discussion
cdrecord requires root privileges. The most
common convention for giving users permissions to use
cdrecord is to create a
cdrecord group.
Sometimes you'll see documentation where it looks
like this:
dev=1,0
It's a common convention to leave off the leading 0
for devices on SCSI bus 0. However, it's not much
trouble to type an extra digit and leave no room for doubt.
The 2.6 kernel needs no special steps to determine the device ID.
Simply use the /dev name:
$ cdrecord dev=/dev/hdc <commands>
11.2.4 See Also
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