problem mounting cd (knoppix booting from hd)

[rosso39]

I have knoppix 3.4 (booting from hd). I cannot mount the cd.

When booting, knoppix tell me:
...
mount: fs type deves not supported by kernel
unmount: devfs: not mounted
...


On fstab:
# /etc/fstab: filesystem table.
#
# filesystem mountpoint type options dump pass
/dev/hda4 / ext3 defaults,errors=remount-ro 0 1

proc /proc proc defaults 0 0
/dev/fd0 /floppy vfat defaults,user,noauto,showexec,umask=022 0 0
usbdevfs /proc/bus/usb usbdevfs defaults 0 0
sysfs /sys sysfs defaults 0 0
/dev/cdrom /cdrom iso9660 defaults,ro,user,noexec,noauto 0 0
/dev/dvd /dvd iso9660 defaults,ro,user,noexec,noauto 0 0
/dev/cdaudio /cdaudio iso9660 defaults,ro,user,noexec,noauto 0 0
# Added by KNOPPIX
/dev/hda1 /mnt/hda1 vfat noauto,users,exec,umask=000 0 0
# Added by KNOPPIX
/dev/hda2 /mnt/hda2 vfat noauto,users,exec,umask=000 0 0
# Added by KNOPPIX
/dev/hda5 /mnt/hda5 vfat noauto,users,exec,umask=000 0 0
# Added by KNOPPIX
/dev/hda6 /mnt/hda6 ext3 noauto,users,exec 0 0
# Added by KNOPPIX
/dev/hda7 none swap defaults 0 0

I have the icon on KDE, but does not show mount option like for the hd.
I try to put a cd, but nothing happen...
If I click on the icon, knoppix says me: file:/mnt/cdrom does not exist.

In /mnt I found cdrom as unknow link, I try to delete it, but nothing happen...
I try to mount by hand, but nothing happen

...any clue? I don't have any idea about what to do! Help!

Thank you!
Rosso39

[rosso39]

...some news...

The units is dvd/cd/rw, and there is a /dev/dvd, but not a /dev/cdrom...

Any clue?

Thanks in advance.
Bye!
Rosso

[Markus]

Can you post here the "append" line from /etc/lilo.conf and the output of:
dmesg |grep cd
dmesg |grep sr
dmesg |grep scd
dmesg |grep hdc

There are a lot of recent posts about the same subject, you could do a search or at least have a look at:
http://www.knoppix.net/forum/viewtopic.php?t=11756
http://www.knoppix.net/forum/viewtopic.php?t=12074

[rosso39]

Hi Markus,
thanks a lot for the suggestion... In another topic I found the solution:

mount -t iso9660 /dev/sr0 /cdrom

...this work. But if I try to use /mnt/cdrom, the computer replies:
mount: mount point /mnt/cdrom is a symbolic link to nowhere

How can I do?

Now, the next problem is to discover how to have my cdrom desktop link working in an automatic way...

Bye!
Rosso39

[Markus]

/mnt/cdrom probably points to /mnt/auto/cdrom or some such, you can check with ls -la /mnt/cdrom . Since Debian has the mountpoint in / it's is supposed to be /cdrom.
If /dev/sr0 works for the cdrom you can change it's line in /etc/fstab to:
/dev/sr0 /cdrom iso9660 defaults,ro,users,noexec,noauto 0 0
Then you should be able to mount it with the command mount /cdrom

The desktop icon is faulty. Right-click on it and change the device to /dev/sr0 and mountpoint to /cdrom.

EDIT: I forgot before. If you only have one hd post the output of dmesg|grep hdb instead of hdc. Still you could post the "append" line from /etc/lilo.conf

[rosso39]

Hi, Markus,
here some useful information (I hope):

$ dmesg|grep cd
sr0: scsi3-mmc drive: 24x/24x writer cd/rw xa/form2 cdda tray

$ dmesg|grep sr
Attached scsi CD-ROM sr0 at scsi0, channel 0, id 0, lun 0
sr0: scsi3-mmc drive: 24x/24x writer cd/rw xa/form2 cdda tray

$ dmesg|grep scd

$ dmesg|grep hdb
ide0: BM-DMA at 0xb800-0xb807, BIOS settings: hdaMA, hdbMA
hdb: TOSHIBA DVD-ROM SD-R6012, ATAPI CD/DVD-ROM drive
hdb: attached ide-scsi driver.

$ dmesg|grep hda
ide0: BM-DMA at 0xb800-0xb807, BIOS settings: hdaMA, hdbMA
hda: IC25N060ATMR04-0, ATA DISK drive
hda: attached ide-disk driver.
hda: host protected area => 1
hda: 117210240 sectors (60012 MB) w/7884KiB Cache, CHS=7296/255/63
hda: hda1 hda2 hda3 < hda5 hda6 hda7 > hda4

$ from lilo.conf:

default="Linux"

image=/boot/vmlinuz
label="Linux"
initrd=/boot/initrd.img
append="ramdisk_size=100000 init=/etc/init lang=us apm=power-off nomce quiet lang)it"
read-only
image=/boot/vmlinuz-2.4.26
label="Linux(2.4)-1"
initrd=/boot/initrd.img-2.4.26
append="ramdisk_size=100000 init=/etc/init lang=us apm=power-off nomce quiet lang)it"
read-only

image=/boot/vmlinuz-2.6.5
label="Linux(2.6)-2"
initrd=/boot/initrd.img-2.6.5
append="ramdisk_size=100000 init=/etc/init lang=us apm=power-off nomce quiet lang)it"
read-only

$ ls -la /mnt/cdrom
lrwxrwxrwx 1 root root 15 Jul 15 14:31 /mnt/cdrom -> /mnt/auto/cdrom

I try to change the symbolic link from /mnt/cdrom to /cdrom, but after rebooting the icon point again to /mnt/cdrom. I didn't find the way to change /dev/cdrom to /dev/sr0.

If I mount the cd by hand, all is working (I also try to burn a CD, and it works).

Thank you and bye,
Alberto

[tweetyhack]

try
rm -f /dev/cdrom
ln -s /dev/cdrom /dev/sr0 #this may be flipped , commands are rusty
mount /cdrom

if it says /mnt/cdrom does not exist...cant u just make it? mkdir /mnt/cdrom and modify fstab

[Markus]

I try to change the symbolic link from /mnt/cdrom to /cdrom, but after rebooting the icon point again to /mnt/cdrom. I didn't find the way to change /dev/cdrom to /dev/sr0.

Have a look in ~/.kde/Autostart and look for a sorticons file or some such. If you find one, delete it.
You have some options here. You can either modify fstab to point to the right device, or make a symlink.
With symlinking you can either do ln -s /dev/sr0 /dev/cdrom or ln -s /dev/hdb /dev/cdrom
sr0 is for SCSI emulation in case you use the 2.4 kernel which would need a hdb=ide-scsi or hdb=scsi in the append line in lilo.conf, hdb is for use with the 2.6 kernel.
Changing fstab would mean (see above which to use):
/dev/sr0 /cdrom iso9660 defaults,ro,users,noexec,noauto 0 0
/dev/hdb /cdrom iso9660 defaults,ro,users,noexec,noauto 0 0
If you symlink you can leave it at: /dev/cdrom /cdrom iso9660 defaults,ro,users,noexec,noauto 0 0

If all this is confusing and you use 2.6.x kernel and can't make up your mind ;
Change fstab to /dev/hdb /cdrom iso9660 defaults,ro,users,noexec,noauto 0 0

[rosso39]

...I was on holiday, so I cannot answer before, sorry...

Anyway, I want just to thank you, because I follow your suggestion, and now the CD icon works properly.
Thank you!



Alberto

[clifswin]

Um... I'm having the same problem. Which of the solutions was the one that worked?

...I was on holiday, so I cannot answer before, sorry...

Anyway, I want just to thank you, because I follow your suggestion, and now the CD icon works properly.
Thank you!



Alberto