Maybe this will help also. I have two CD drives. One is the internal IDE drive I'm trying to get scsi emulation working for, the other is an external USB drive that already emulates as a scsi device. Note that despite the settings above, the internal drive is showing up as IDE and not SCSI:
# hwinfo --cdrom
12: IDE 02.0: 10602 CD-ROM
[Created at ide.127]
Unique ID: hY5p.8dw3P2TyJK3
Hardware Class: cdrom
Model: "LTN526D"
Device: "LTN526D"
Revision: "YSR5"
Serial ID: ""
Driver: "ide-default"
Device File: /dev/hdc
Drive status: no medium
Config Status: cfg=yes, avail=yes, need=no
Attached to: #4 (IDE interface)

16: SCSI 103.0: 10602 CD-ROM
[Created at usb.100]
Unique ID: B3Fu.2hERXL7yFo5
Hardware Class: cdrom
Model: "Memorex 52MAXX 3252AJ"
Hotplug: USB
Vendor: "Memorex"
Device: "52MAXX 3252AJ"
Revision: "QWS5"
Serial ID: "00000000000037AB"
USB GUID: 05ab006000000000000037ab
Driver: "usb-storage"
Device File: /dev/sr0
Speed: 1.5 Mbps
Drive status: no medium
Config Status: cfg=no, avail=yes, need=no
Attached to: #14 (Hub)

The device file shows as follows:
more hY5p.8dw3P2TyJK3
[General]
UniqueID=hY5p.8dw3P2TyJK3
HWClass=cdrom
Model=LTN526D

[Status]
Configured=yes
Available=yes
Needed=no

[Hardware]
Bus=0x85
Slot=0x2
BaseClass=0x106
SubClass=0x2
DeviceName=LTN526D
RevisionName=YSR5
Serial=
UnixDevice=/dev/hdc

OK, this is it for tonight. After I enter the command
modprobe ide-scsi
my hwinfo --cdrom looks like this, but I still can't mount the a cd. How can I get the ide-scsi module to load without having to issue the modprobe command?
14: SCSI 100.0: 10602 CD-ROM
[Created at scsi.230]
Unique ID: Q8g5.j0s4jxLIh9B
Hardware Class: cdrom
Model: "LITEON LTN526D"
Vendor: "LITEON"
Device: "LTN526D"
Revision: "YSR5"
Serial ID: ""
Driver: "ide-scsi"
Device File: /dev/sr1
Config Status: cfg=no, avail=yes, need=no
Drive Speed: 52

17: SCSI 103.0: 10602 CD-ROM
[Created at usb.100]
Unique ID: B3Fu.2hERXL7yFo5
Hardware Class: cdrom
Model: "Memorex 52MAXX 3252AJ"
Hotplug: USB
Vendor: "Memorex"
Device: "52MAXX 3252AJ"
Revision: "QWS5"
Serial ID: "00000000000037AB"
USB GUID: 05ab006000000000000037ab
Driver: "usb-storage"
Device File: /dev/sr0
Speed: 1.5 Mbps
Drive status: no medium
Config Status: cfg=no, avail=yes, need=no
Attached to: #15 (Hub)
linux:/tmp # mount /media/cdrom
/dev/cdrom: Input/output error

OK, this really is it for tonight. I added the line
modprobe ide-scsi
to the end of /etc/init.d/boot.local and this is how things look now:
/etc/fstab
/dev/hda2 / reiserfs defaults 1 1
/dev/hda1 /data1 auto noauto,user 0 0
/dev/hda3 swap swap pri=42 0 0
devpts /dev/pts devpts mode=0620,gid=5 0 0
proc /proc proc defaults 0 0
usbdevfs /proc/bus/usb usbdevfs defaults,devmode=0666 0 0
/dev/fd0 /media/floppy auto noauto,user,sync 0 0
/dev/cdrom /media/cdrom auto ro,noauto,user,exec 0 0
/dev/cdrom2 /media/cdrom2 auto ro,noauto,user,exec 0 0


ls -l /dev/cdrom*
lrwxrwxrwx 1 root root 3 Dec 12 22:07 /dev/cdrom -> sr0
lrwxrwxrwx 1 root root 3 Dec 12 22:11 /dev/cdrom2 -> sr1

# hwinfo --cdrom
13: SCSI 00.0: 10602 CD-ROM
[Created at scsi.230]
Unique ID: zyP1.j0s4jxLIh9B
Hardware Class: cdrom
Model: "LITEON LTN526D"
Vendor: "LITEON"
Device: "LTN526D"
Revision: "YSR5"
Serial ID: ""
Driver: "ide-scsi"
Device File: /dev/sr0
Drive status: no medium
Config Status: cfg=yes, avail=yes, need=no
Drive Speed: 52

17: SCSI 103.0: 10602 CD-ROM
[Created at usb.100]
Unique ID: B3Fu.2hERXL7yFo5
Hardware Class: cdrom
Model: "Memorex 52MAXX 3252AJ"
Hotplug: USB
Vendor: "Memorex"
Device: "52MAXX 3252AJ"
Revision: "QWS5"
Serial ID: "00000000000037AB"
USB GUID: 05ab006000000000000037ab
Driver: "usb-storage"
Device File: /dev/sr1
Speed: 1.5 Mbps
Config Status: cfg=yes, avail=yes, need=no
Attached to: #15 (Hub)


Attempt to mount CD in either drive:
# mount /media/cdrom2
/dev/cdrom2: Input/output error
mount: you must specify the filesystem type

# mount /media/cdrom
/dev/cdrom: Input/output error
mount: you must specify the filesystem type


I'm calling it a night. Thanks for all of the help to date. Does any of this look like I"m getting close to a resolution? Any more advice is greatly apprecaited.

OK. It must be the late hour or the tunnel vision I was getting, but I decided to try another CD and now it works. Also, when I run K3b, I can see the internal read-only CD device as a source for copying CDs. Thanks for letting me ramble and for all of the help and advice.

Regards,
Brad