On Saturday 21 December 2002 06:15 am, John Haywood wrote:
> On Sat, 21 Dec 2002 11:14 am, John Haywood wrote:
> > I've just added a DVD(ro)/CDR combo drive in to my system, and I thought
> > I had configured correctly:
> >
> > /dev/cdrom is linked to cdroms/cdrom0, which is linked to
> > ../scsi/host0/bus0/target2/lun0/cd
> >
> > the scsi modules are loaded, but ...
> >
> > 1. cdrecord -scanbus errors
> > 2. no dvd
> >
> > any ideas or url? The dvd howto is hopelessly out-of-date (no devfs..)
>
> ...oh dear! now the cdrom part is playing up too.....
John,
        On my system I have a Samsung dvd/cdrw combo that seems to be working OK. On 
my system the drive is on the second IDE controller as a master, with another 
cd reader on the same channel as a slave. Due to some incorrect settings with 
an on board Promise raid controller my dvd/cdrw is detected by Linux as 
/dev/hdg on the "ide side" of things. Anyway, devfs treats it this way in 
lilo.conf:

image=/boot/vmlinuz
        label=linux
        root=/dev/hde1
        initrd=/boot/initrd.img
        append="quiet devfs=mount hdg=ide-scsi"
        vga=788

Doing a ls -la on dev/scd0 returns the following:

/dev/scd0 -> scsi/host0/bus0/target6/lun0/cd

I created a link in /dev for the dvd side that looks like this: 

/dev/dvd -> scsi/host0/bus0/target6/lun0/cd

cdrecord -scanbus returns:
Using libscg version 'schily-0.6'
scsibus0:
        0,0,0     0) *
        0,1,0     1) *
        0,2,0     2) *
        0,3,0     3) *
        0,4,0     4) *
        0,5,0     5) *
        0,6,0     6) 'SAMSUNG ' 'CDRW/DVD SM-332B' 'T403' Removable CD-ROM
        0,7,0     7) *

To enable DMA on the drive I do: 

hdparm -d 1 /dev/hdg 

On my system this  makes dvd playback smoother

I do not use supermount, so my fstab entry for the drive looks like this: 

/dev/scd0 /mnt/cdburn auto 
user,iocharset=iso8859-1,exec,codepage=850,ro,noauto 0 0

Hope the above gibberish is of some help to you.

Jim



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