CD-rom acts up

don_dimo · 10-31-2003, 07:56 PM

Hi,
I tried to mount my cdrom on my RH 8 machine and it gave me the following error:

mount: /dev/cdrom: can't read superblock

Anyone knows what that's for??

jailbait · 10-31-2003, 08:55 PM

"mount: /dev/cdrom: can't read superblock"

Usually that message means that you specified the wrong file system type in the mount command. Try something similar to:
mount -t is09660 /dev/hdd /mnt/cdrom

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don_dimo · 10-31-2003, 09:25 PM

Yes - you are right, I looked at my fstab file and for some reason it was modified for the cdrom only and it tries to mount it on /dev/cdrom which is nonexistent..my linux obviously has a mind of its own..Thx a lot for the help!!

don_dimo · 10-31-2003, 09:48 PM

Ok .. actually that did not quite fix the problem... it still gives the same error when I tried to mount it with:

mount -t iso9660 /dev/hdc /mnt/cdrom/
mount: /dev/hdc: can't read superblock

/dev/hdc is where /dev/cdrom used to point at, I tried to create a new link but that still did not work. I need to mention probably that I had problems with initscripts which I had to reinstall .. Could that have affected the cdrom??

jailbait · 10-31-2003, 10:06 PM

Are you trying to mount the cdrom as user? If so then make sure that user has the proper permissions on /dev/hdd, /dev/cdrom, and /mnt/cdrom. Also if you are using ide-scsi then the kernel has switched the CD address to a scsi device, probably /dev/scd0

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don_dimo · 10-31-2003, 10:13 PM

Of course not .. i am root, but something else is wrong - I just tried to start xcdroast and it could not even detect the cdrom and complained about scsi emulation being enabled in the kernel. Now my cdrom is a regular LG 24x10x40x CD-RW, and i've tried both mount cdrom , and mount -t iso9660 /dev/hdc /mnt/cdrom .. it gives the same error - i have no idea why???

jailbait · 11-01-2003, 10:08 AM

" I just tried to start xcdroast and it could not even detect the cdrom and complained about scsi emulation being enabled in the kernel."

If you have a CD-ROM then Linx supports it as an IDE device on /dev/hdc. If you have a CD-RW then Linux supports it as a SCSI device on /dev/scd0.

If you are trying to burn a CD then you have a CD-RW. You must use the bootloader (either grub or lilo) to pass the kernel a boot parameter: append="hdc=ide-scsi" The append tells the kernel to use scsi suport for the CD-RW. Then your CD-RW will appear to be on /dev/scd0 (at least that is where SuSE puts it). Make /dev/cdrom a symbolic link to /dev/scd0 and you can do your mounts mounts on either /dev/cdrom or /dev/scd0.

___________________________________
Be prepared. Create a LifeBoat CD.
http://users.rcn.com/srstites/LifeBo...home.page.html

Steve Stites