OK. I recompiled my kernel last week and tried to mount a CD-ROM last night. When I try to mount I get this:

[root@localhost /]# mount /mnt/cdrom
mount: /dev/cdrom: can't read superbloc

Here is what my fstab says:

/dev/cdrom /mnt/cdrom auto noauto,owner,kudzu,ro 0 0

(OK it says more than that but this line is the only relevent one)

Here is what it says when I run cdrecord -scanbus:

[root@localhost /]# cdrecord -scanbus
Cdrecord 2.0 (i686-pc-linux-gnu) Copyright (C) 1995-2002 Jörg Schilling
cdrecord: No such file or directory. Cannot open '/dev/pg*'. Cannot open SCSI driver.
cdrecord: For possible targets try 'cdrecord -scanbus'. Make sure you are root.
cdrecord: For possible transport specifiers try 'cdrecord dev=help'.

This would lead me to believe that when I recompiled my kernel I didn't include SCSI emulation for IDE devices even though I did include SCSI support. Is that where my problem lies? If so can I do: make oldconfig and change it? In grub I have hdc=ide-scsi and hdd=ide-scsi. Is this wrong?

FYI this drive is a Sony CD-RW CRX220E1, ATAPI CD-ROM drive.

Any help would be greatly appreciated.

Thanks,
Phekno

P.S. I did search the LQ forum for this problem before I posted so don't rag on me.

You will need to enable generic scsi support as well as scsi support.

What does /dev/cdrom point to? If it is still pointing to /dev/hdc or /dev/hdd, that could be the problem too. For example, my /dev/cdrom is a link pointing to /dev/sr0.

When you do 'dmesg | less' do you see lines like this in the output:

SCSI subsystem driver Revision: 1.00
hdc: attached ide-scsi driver.
scsi0 : SCSI host adapter emulation for IDE ATAPI devices
Vendor: SAMSUNG Model: CDRW/DVD SM-348B Rev: T501
Type: CD-ROM ANSI SCSI revision: 02

Here are some answers to your questions:

[root@localhost dev]# ls -alc | grep cdrom
lrwxrwxrwx 1 root root 8 Oct 15 18:39 cdrom -> /dev/hdc

So to answer your first question, yes, /dev/cdrom is pointing to /dev/hdc.

ide_setup: hdc=ide-scsi
ide_setup: hdd=ide-scsi

SCSI subsystem driver Revision: 1.00
kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2
kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2

Those are several things that I found under dmesg. When I compiled the kernel a week ago I specifically remember compiling into the kernel (not a module) generic scsi support, however, I don't think (I don't even know if this is an option) I added support for scsi emulation and I think that is why I can't mount this thing. The other option is that it's a bad disk, but I hope that's not the case.

Later,
Phekno

Change /dev/cdrom so that it points to /dev/sr0 and then try to mount the drive, or enter the command 'mount -t auto /dev/sr0 /mnt/cdrom'. The reason for this is that now that you have told the kernel that hdc should be handled as a scsi device you need to address it as such.

What you need to compile support for, either in the kernel or as a module, is scsi support, generic scsi support, and (under the ide/atapi) scsi emulation. Looks like you've got all that covered. (Although checking again can't hurt.)

BTW, what distro are you trying this on? I am not certain if they all use /dev/sr0 for the first scsi drive in the chain. My Slackware box does; so does my SuSE 8.0 box. But, I have never run Red Hat or Mandrake.