(r7) CdWriter - Tech - The Caboteria

HP 9350i 10x4x32 IDE, slave on ide0

Read CD-writing HOWTO at LDP ( http://en.tldp.org/HOWTO/CD-Writing-HOWTO.html ).

In a nutshell you need to configure the ide-scsi module so that the cdrecord tool thinks it's writing to a scsi burner. Note that the device shows up as /dev/scd0, not /dev/hdd.

Using modules you need to load ide-scsi before ide-cd so that it grabs the cdrom, or else tell ide-cd not to use one of the cdrom drives.

If you want to let people other than root use the CD drive you'll need to chmod both /dev/scd0 and /dev/sg0.

poohpa:~# cdrecord -scanbus
Cdrecord 1.8 (i686-pc-linux-gnu) Copyright (C) 1995-2000 Jörg Schilling
Using libscg version 'schily-0.1'
scsibus0:
        0,0,0     0) 'HP      ' 'CD-Writer+ 9300 ' '1.0b' Removable CD-ROM
        0,1,0     1) *
        0,2,0     2) *
        0,3,0     3) *
        0,4,0     4) *
        0,5,0     5) *
        0,6,0     6) *
        0,7,0     7) *
poohpa:~#

http://www.torque.net/scsi/SCSI-2.4-HOWTO/ - the The Linux 2.4 SCSI subsystem HOWTO is helpful in figuring out which modules need to be loaded and in what order.

You use mkisofs to make the iso 9660 filesystem image and then cdrecord to write it to the disk (both packages can be dselected). For example, this will build a filesystem image called /mnt/test/cd_image with /home/cvs as /cvs, /home/www as /www, and /home/postgres as /postgres:

# cd /home
# mkisofs -r -o /mnt/test/cd_image cvs/=cvs www/=www postgres/=postgres

You can mount the image via loopback to see if it's what you want:

# mount -t iso9660 -o ro,loop=/dev/loop0 /mnt/test/cd_image /mnt/cdrom

Then you can burn a CD with the image (note that the blank=fast flag tells cdrecord to erase the media first - this only works with cd/rw media, also note that the "0,0,0" matches what cdrecord -scanbus output above):

# cdrecord -v speed=4 dev=0,0,0 blank=fast -data /mnt/test/cd_image

Alternatively you can pipe the output of mkisofs into cdrecord. This doesn't chew up a lot of temporary disk storage, but you don't get to look at the results before you burn them. This is probably OK if you're using cd/rw media or if you're running the same script over and over (e.g. backups):

# cd /home
# mkisofs -r cvs/=cvs www/=www postgres/=postgres | cdrecord -v speed=4 dev=0,0,0 blank=fast -data -

The HOWTO talks about having to do a pro-forma mkisofs run to find out how big the image will be but it appears that the HP 9350i doesn't require this.

Audio CD's

Of the tools that you can "dselect" only cdrtoaster appears to be able to take mp3's as input and burn them onto an audio disc.