When I look in Yast Control Center I see the following for my CD-RW:

CD-RW CRX100E
Bus: IDE
CD type: cdrom
Class (spec): CD-ROM
Class: Mass Storage Device
Device: CD-RW CRX-100E
Evice name: /dev/hdd
Model: CD-RW CRX100E
Rev: 2.0h
Unique key: bunch of characters
driver: ide-default
notready: Yes
old_unique_key: some other characters


When I look at /var/log/messages, I see the following:
kernel: end_request: I/O error, dev 02:00 (floppy), sector 0
kernel: cdrom: open failed
kernel: ide-floppy driver 0.99.newide
mdprobe: modprobe: Can't locate module ide-cd


MY CD-RW drive used to work until I recompiled the kernel last night. MY IDE CD-ROM drive works fine and i s using the ide-cdrom driver (instead of the the ide-default driver.

Recommendations?

I am using 2.4.21 in SuSE 8.1 Pro.

Are you using SCSI emulation to burn? In that case, you need to pass an option to the kernel in lilo.conf that looks something like:

append="/dev/hdd=ide-scsi"

--Rounan

I have heard mixed things about whether I should or should not be using SCSI emulation. And I do not know whether I am using it or not. I already have that though (or rather, the equivalent in grub).

as far as I know, with a 2.4 kernel, you have to use scsi unless you've patched in some backports. I've heard the same mixed reviews though - in particular, the kernel config calls ide "more efficient in every way" while xcdroast tells me "performance would be greatly improved by enabling scsi emulation."

If you already have that line appended, then maybe you didn't enable IDE-scsi emulation in the kernel? check out your IDE section for the scsi emulation option.

--Rounan

you're right, i have scsi emulation set as a module. hopefully if i build it in, that will fix the problem. i'll let you know.

well, now the drive seems to work, but i can't use it to burn. (i know...contradiction.) when i try to burn it kinda flashes and acts like it's doing something, but never quite gets the job done. therefore, baffled.

it's /dev/sr0 (because i can type "eject sr0" and that works fine).

help!!!

have you got some error messages or something written in log files ? It can help to guess where the problem is from

kernel: ide-floppy driver 0.99
modprobe: Can't locate module ide-cd

But this happend when i installed Suse 8.0 Prof with a Serial ATA, in order to load the drivers i use a floppy before begin the Suse intall with, ctr - alt in order to teach Suse intall to use the floppy drivers.

But after the first reboot when it ask for CD 2, is not able to mount my cdrom any more .

I guess i trying to use the drivers from the floppy, but i dont know how to instruct linux to use specific drivers..

any idea ?..

BTW, the Serial ATA was recognized and is working well.... :S

1) currently i can eject cdrecorder or eject cdrom
here's my setup:
>>>ls -al /dev/cd*
brw-rw---- 1 root disk 19, 128 2002-09-09 16:24 /dev/cdouble0
brw-rw---- 1 root disk 19, 129 2002-09-09 16:24 /dev/cdouble1
lrwxrwxrwx 1 root root 3 2004-02-24 19:20 /dev/cdreader_old -> sr0
lrwxrwxrwx 1 root root 3 2004-02-26 01:16 /dev/cdrecorder -> sr0
lrwxrwxrwx 1 root root 3 2004-02-24 20:27 /dev/cdrecorder_old -> sr0
lrwxrwxrwx 1 root root 8 2004-02-26 01:23 /dev/cdrom -> /dev/hdc
brw-r----- 1 root disk 24, 0 2002-09-09 16:24 /dev/cdu535
lrwxrwxrwx 1 root root 4 2004-02-24 19:19 /dev/cdwriter_old -> scd1

here's my /etc/fstab:
/dev/hda2 / reiserfs defaults 1 1
/dev/hdb1 /data1 auto noauto,user 0 0
/dev/hda1 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 noauto 0 0
#/dev/cdrecorder /media/cdrecorder auto ro,noauto,user,exec 0 0
/dev/cdrom /media/cdrom auto ro,noauto,user,exec 0 0
/dev/fd0 /media/floppy auto noauto,user,sync 0 0
/dev/sr0 /media/cdrecorder auto ro,noauto,user,exec 0 0
#/dev/scd1 /cdrecorder auto ro,noauto,user,exec 0 0
#/dev/sda1 /media/sda1 auto noauto,user,exec 0 0 #HOTPLUG B3Fu.mrp5DZ2Q9VE


2) here's what i get in /var/log/messages (things that look interesting to the topic):

Feb 27 02:22:39 raphael kernel: scsi1 : SCSI emulation for USB Mass Storage devices
Feb 27 02:22:39 raphael kernel: Vendor: 32MB Model: HardDrive Rev: 1.11
Feb 27 02:22:39 raphael kernel: Type: Direct-Access ANSI SCSI revision: 02
Feb 27 02:22:39 raphael kernel: Attached scsi removable disk sda at scsi1, channel 0, id 0, lun 0
Feb 27 02:22:39 raphael kernel: SCSI device sda: 64512 512-byte hdwr sectors (33 MB)
Feb 27 02:22:39 raphael kernel: sda: Write Protect is off
Feb 27 02:22:39 raphael kernel: sda: sda1
Feb 27 02:22:39 raphael kernel: WARNING: USB Mass Storage data integrity not assured
Feb 27 02:22:39 raphael kernel: USB Mass Storage device found at 3
Feb 27 02:22:39 raphael kernel: USB Mass Storage support registered.
Feb 27 02:22:42 raphael kernel: PCI: Found IRQ 10 for device 00:1f.5
Feb 27 02:22:42 raphael kernel: PCI: Sharing IRQ 10 with 00:1f.3
Feb 27 02:22:42 raphael kernel: PCI: Setting latency timer of device 00:1f.5 to 64
Feb 27 02:22:42 raphael kernel: intel8x0: clocking to 48000
Feb 27 02:22:46 raphael /usr/sbin/cron[1694]: (CRON) STARTUP (fork ok)
Feb 27 02:22:49 raphael kernel: isapnp: Scanning for PnP cards...
Feb 27 02:22:49 raphael kernel: isapnp: No Plug & Play device found
Feb 27 02:22:50 raphael /etc/hotplug/net.agent[1430]: No HW description found ... exiting
Feb 27 02:22:53 raphael kernel: cdrom: open failed.
Feb 27 02:22:53 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:53 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 64
Feb 27 02:22:53 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:53 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 66
Feb 27 02:22:53 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:53 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 68
Feb 27 02:22:53 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:53 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 70
Feb 27 02:22:53 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:53 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 72
Feb 27 02:22:53 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:53 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 74
Feb 27 02:22:53 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:53 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 76
Feb 27 02:22:53 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:53 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 78
Feb 27 02:22:56 raphael kernel: eth0: no IPv6 routers present
Feb 27 02:22:57 raphael kernel: cdrom: open failed.
Feb 27 02:22:57 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:57 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 64
Feb 27 02:22:57 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:57 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 66
Feb 27 02:22:57 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:57 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 68
Feb 27 02:22:57 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:57 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 70
Feb 27 02:22:57 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:57 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 72
Feb 27 02:22:57 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:57 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 74
Feb 27 02:22:57 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:57 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 76
Feb 27 02:22:57 raphael kernel: ide-scsi: hdd: unsupported command in request queue (0)
Feb 27 02:22:57 raphael kernel: end_request: I/O error, dev 16:40 (hdd), sector 78
Feb 27 02:23:01 raphael kernel: cdrom: open failed.
Feb 27 02:23:03 raphael kernel: mtrr: 0xfd000000,0x800000 overlaps existing 0xfd000000,0x400000
Feb 27 02:23:03 raphael kernel: mtrr: 0xfd000000,0x800000 overlaps existing 0xfd000000,0x400000


3)javo, i think you need to build in scsi emulation when you build the kernel.

the scope of building the kernel is something to read elsewhere on. too complex for this discussion.