CD-RW/DVD-ROM Combo
Gene Dascher
gedascher at multiservice.com
Mon Apr 5 14:04:12 CDT 2004
Just in case anyone on the list using Gentoo (kernel 2.4.x) might have problems getting a CD-RW/DVD
Combo drive to burn cds with ide-scsi emulation and play DVDs with DMA enabled.
Here is what I did to solve my problem:
1) I re-compiled my kernel with both ide-cd and ide-scsi as modules.
2) I removed the line "hdc=ide-scsi" from my grub.conf file so my CD-RW/DVD drive is in
ide-cd mode at boot time.
3) I wrote a script called set_ide_scsi: rmmod ide-cd; insmod ide-scsi;
4) I write a script called set_ide_cd: rmmod ide-scsi; insmod ide-cd; hdparm -d 1 /dev/hdc
5) I wrote a couple of wrapper scripts for cdrdao and cdrecord that first call
set_ide_scsi, then call the real binary cd burning program with pre-determined parameters, then
finally call set_ide_cd.
This all works very well for me, as now I am able to seamlessly watch DVDs and burn CDs
(from the command line) on my machine.
Gene
> -----Original Message-----
> From: Gene Dascher [mailto:gedascher at multiservice.com]
> Sent: Friday, April 02, 2004 07:36
> To: Duane Attaway
> Subject: CD-RW/DVD-ROM Combo
>
> I have re-installed Gentoo using 2004.00 as I got a new motherboard, etc. so I decided to start
from scratch.
> Everything is working wonderfully, except for the DVD-ROM/CD-RW combo drive. If I set the drive
up for scsi emulation
> in grub (hdc=ide-scsi), it burns cds just fine BUT DVDs don't play correctly, as DMA is not
enabled. Conversely, if I
> remove the ide-scsi line from grub, I can set dma=1 with hdparm for that drive and DVDs play just
fine, but I can't burn
> CDs.
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