RH7.2 CD-Roms Enable scsi emulation.

[James McDonald]

Umm I don't know if this will help but I pass a kernel parameter when I boot 
for my CDRW/DVD.... A Ricoh 9200A...

so in grub I put hdX=ide-scsi where X is the letter of your CD/CDRW.... 
To tell the kernel to treat it like a scsi device.... I think it's called 
scsi emulation.

Here is a sample from my /etc/grub.conf
title Red Hat Linux (PreEmpt)
        root (hd0,2)
        kernel /boot/vmlinuz-2.4.18-2002-04-25preempt ro root=/dev/hda3  
hdc=ide-scsi 
        initrd /boot/initrd-2.4.18-2002-04-25.img
# the above lines from kernel to ide-scsi is on one line
if you have another cdrom / cdrw put "hdc=ide-scsi hdd=ide-scsi" change the 
lettering to suit your install.

if you have to do this in lilo 
put an "append="hdc=ide-scsi hdd=ide-scsi"" in the global configuration area 
(i.e. up the top of the file not in the seperate image sections)

I did the following command as root.

ln -sf /dev/scd0 /dev/cdrom

If you have a cdrom and a cdrw  then do both these...
ln -sf /dev/scd0 /dev/cdrom
ln -sf /dev/scd1 /dev/cdrw

and your fstab should have these entries so you can mount both as CD's
/dev/cdrom /mnt/cdrom iso9660 noauto,owner,kudzu,ro 0 0
/dev/cdrw /mnt/cdrw iso9660 noauto,owner,kudzu,ro 0 0

any of your burning sotware should refer to the
/dev/scd1 device or whatever your cdrw is... number it is....

if you do it correctly you will get the following when you do a dmesg | grep 
hd.
Kernel command line: ro root=/dev/hda3 hdc=ide-scsi
ide_setup: hdc=ide-scsi
telling you the kernel has read the parameter and understands that you want 
to treat your IDE CD's like scsi...

On Fri, 3 May 2002 05:30, you wrote:
> On Thu, 2 May 2002, Lee wrote:
> > Have same problem as Sebastian. Installed RH7.2 sucessfully. Two CD-ROMs
> > icons present on the desktop, but won't mount. Tried dmesg. Found CD-ROM
> > and CDRW by manufacture type, but nothing else; except for entry: hdb
> > driver not present (1st CD-ROM, primary slave) hdd driver not present
> > (Iomega CDRW, secondary slave.) Where do I find the drivers for these?
>
> what's a hdb and an hdd driver??  IDE supported is traditionally compiled
> into the kernel.  I've never had any of these problems on the box where i
> have RH-7.2 installed.  Then again, when i want to mount a device, i do it
> from the command line as god intended.