huge problems mounting a cdrom and a cd rw.

[DimGR]

i was told that this might be a bug in the distro...
I am using Overclockix hd installed which is a knoppix remastered.

this is how my fstab looked like before any changes. NOTE that i do not have a dvd and overclockix auto-named the devices as dvd and cdaudio1


/etc/fstab: filesystem table.
#
# filesystem mountpoint type options dump pass
/dev/hda1 / ext3 defaults,errors=remount-ro 0 1
/dev/hda2 none swap sw 0 0
proc /proc proc defaults 0 0
/dev/fd0 /floppy vfat defaults,user,noauto,showexec,umask=022 0 0
/dev/dvd /dvd iso9660 defaults,ro,user,noexec,noauto 0 0
/dev/cdaudio /cdaudio iso9660 defaults,ro,user,noexec,noauto 0 0
/dev/cdrom /cdrom iso9660 defaults,ro,user,noexec,noauto 0 0
# Added by KNOPPIX
/dev/hdb5 /mnt/hdb5 ntfs noauto,users,exec,ro,umask=000 0 0
# Added by KNOPPIX
/dev/sda1 /mnt/sda1 vfat noauto,users,exec,umask=000 0 0


and this is my mtab


/dev/hda1 / ext3 rw,errors=remount-ro 0 0
none /proc proc rw 0 0
devpts /dev/pts devpts rw,gid=5,mode=620 0 0
usbfs /proc/bus/usb usbfs rw 0 0
/dev/cdaudio /cdaudio iso9660 defaults,ro,user,noexec,noauto 0 0
/dev/cdrom /cdrom iso9660 defaults,ro,user,noexec,noauto 0 0



i click on the cdrom icon and i get an error saying : error kdektop

unable to run the specified command. THe file or folder file:/mnt/cdrom does not exist

same thing for the cd wr

as root i try to create a folder names cdrom in the mnt directory and it does not let me .

From a console i do this: mount /mnt/cdrom and it does not let me . I can see the cdrom and cdaudio folder in the root partition though


I corrected the fstab because i did not mount them in /dev but instead i said /mnt/cdrom

/dev/cdaudio /mnt/cdaudio1 iso9660 defaults,ro,user,noexec,noauto 0 0
/dev/cdrom /mnt/cdrom iso9660 defaults,ro,user,noexec,noauto 0 0

Then, the cdrom worked fine but i was still getting this error for the cdrw

Could not mount device.
The reported error was:
mount: special device /dev/cdaudio does not exist


in the /mnt dir there is a cdrom folder and a cdaudio folder

i just tried burning an ISO image using the cd rw and it worked fine. On the other hand though, when i create a new device cdrw on my desktop , i get the above error



ls -al /dev | grep cd
brw-rw---- 1 root cdrom 29, 0 Apr 14 2001 aztcd0
brw-rw---- 1 root cdrom 41, 0 Apr 14 2001 bpcd
lrwxrwxrwx 1 root root 3 May 17 22:45 cdrom -> sr0
brw-rw---- 1 root cdrom 24, 0 Apr 14 2001 cdu535
brw-rw---- 1 root cdrom 30, 0 Apr 14 2001 cm206cd0
brw-rw---- 1 root cdrom 16, 0 Apr 14 2001 gscd0
brw-rw---- 1 root cdrom 24, 0 Apr 14 2001 lmscd
brw-rw---- 1 root cdrom 23, 0 Apr 14 2001 mcd
lrwxrwxrwx 1 root root 5 May 17 22:40 mcdx -> mcdx0
brw-rw---- 1 root cdrom 20, 0 Apr 14 2001 mcdx0
brw-rw---- 1 root cdrom 20, 1 Apr 14 2001 mcdx1
brw-rw---- 1 root cdrom 20, 2 Apr 14 2001 mcdx2
brw-rw---- 1 root cdrom 20, 3 Apr 14 2001 mcdx3
brw-rw---- 1 root cdrom 20, 4 Apr 14 2001 mcdx4
brw-rw---- 1 root cdrom 17, 0 Apr 14 2001 optcd
brw-rw---- 1 root cdrom 46, 0 Jun 2 2001 pcd0
brw-rw---- 1 root cdrom 46, 1 Jun 2 2001 pcd1
brw-rw---- 1 root cdrom 46, 2 Jun 2 2001 pcd2
brw-rw---- 1 root cdrom 46, 3 Jun 2 2001 pcd3
crw-rw-rw- 1 root tty 2, 221 Apr 14 2001 ptycd
lrwxrwxrwx 1 root root 6 May 17 22:40 sbpcd -> sbpcd0
brw-rw---- 1 root cdrom 25, 0 Apr 14 2001 sbpcd0
brw-rw---- 1 root cdrom 25, 1 Apr 14 2001 sbpcd1
brw-rw---- 1 root cdrom 25, 2 Apr 14 2001 sbpcd2
brw-rw---- 1 root cdrom 25, 3 Apr 14 2001 sbpcd3
brw-rw-r-- 1 root cdrom 11, 0 May 30 2001 scd0
brw-rw---- 1 root cdrom 11, 1 May 30 2001 scd1
brw-rw---- 1 root cdrom 11, 10 May 30 2001 scd10
brw-rw---- 1 root cdrom 11, 11 May 30 2001 scd11
brw-rw---- 1 root cdrom 11, 12 May 30 2001 scd12
brw-rw---- 1 root cdrom 11, 13 May 30 2001 scd13
brw-rw---- 1 root cdrom 11, 14 May 30 2001 scd14
brw-rw---- 1 root cdrom 11, 15 May 30 2001 scd15
brw-rw---- 1 root cdrom 11, 16 May 30 2001 scd16
brw-rw---- 1 root cdrom 11, 2 May 30 2001 scd2
brw-rw---- 1 root cdrom 11, 3 May 30 2001 scd3
brw-rw---- 1 root cdrom 11, 4 May 30 2001 scd4
brw-rw---- 1 root cdrom 11, 5 May 30 2001 scd5
brw-rw---- 1 root cdrom 11, 6 May 30 2001 scd6
brw-rw---- 1 root cdrom 11, 7 May 30 2001 scd7
brw-rw---- 1 root cdrom 11, 8 May 30 2001 scd8
brw-rw---- 1 root cdrom 11, 9 May 30 2001 scd9
brw-rw---- 1 root cdrom 18, 0 Apr 14 2001 sjcd
brw-rw---- 1 root cdrom 15, 0 Apr 14 2001 sonycd
lrwxrwxrwx 1 root root 4 May 17 22:40 sr0 -> scd0
lrwxrwxrwx 1 root root 4 May 17 22:40 sr1 -> scd1
lrwxrwxrwx 1 root root 5 May 17 22:40 sr10 -> scd10
lrwxrwxrwx 1 root root 5 May 17 22:40 sr11 -> scd11
lrwxrwxrwx 1 root root 5 May 17 22:40 sr12 -> scd12
lrwxrwxrwx 1 root root 5 May 17 22:40 sr13 -> scd13
lrwxrwxrwx 1 root root 5 May 17 22:40 sr14 -> scd14
lrwxrwxrwx 1 root root 5 May 17 22:40 sr15 -> scd15
lrwxrwxrwx 1 root root 5 May 17 22:40 sr16 -> scd16
lrwxrwxrwx 1 root root 4 May 17 22:40 sr2 -> scd2
lrwxrwxrwx 1 root root 4 May 17 22:40 sr3 -> scd3
lrwxrwxrwx 1 root root 4 May 17 22:40 sr4 -> scd4
lrwxrwxrwx 1 root root 4 May 17 22:40 sr5 -> scd5
lrwxrwxrwx 1 root root 4 May 17 22:40 sr6 -> scd6
lrwxrwxrwx 1 root root 4 May 17 22:40 sr7 -> scd7
lrwxrwxrwx 1 root root 4 May 17 22:40 sr8 -> scd8
lrwxrwxrwx 1 root root 4 May 17 22:40 sr9 -> scd9
crw-rw-rw- 1 root tty 3, 221 Apr 14 2001 ttycd


as of today , this is my fstab

/etc/fstab: filesystem table.
#
# filesystem mountpoint type options dump pass
/dev/hda1 / ext3 defaults,errors=remount-ro 0 1
/dev/hda2 none swap sw 0 0
proc /proc proc defaults 0 0
/dev/fd0 /floppy vfat defaults,user,noauto,showexec,umask=022 0 0
/dev/dvd /dvd iso9660 defaults,ro,user,noexec,noauto 0 0
/dev/cdaudio /mnt/cdaudio iso9660 defaults,ro,user,noexec,noauto 0 0
/dev/cdrom /mnt/cdrom iso9660 defaults,ro,user,noexec,noauto 0 0
# Added by KNOPPIX
/dev/hdb5 /mnt/hdb5 ntfs noauto,users,exec,ro,umask=000 0 0
# Added by KNOPPIX
/dev/sda1 /mnt/sda1 vfat noauto,users,exec,umask=000 0 0



i do not have a dvd drive but the dvd in the fstab was entered by knoppix , not by me.

in the / root partition i see a folder named cdaudio and another one cdrom

in the /dev directory i see only a cdrom nothing for cdaudio


once again i did not give my cdrw the name cdaudio. It was named like that by default.


ls -al /dev/dvd
lrwxrwxrwx 1 root root 16 May 17 22:45 /dev/dvd -> /KNOPPIX/dev/dvd



i do not have a dvd drive. Myabe knoppix thinks the cdrw is a dvd ???

ls -al /dev/cdrom
lrwxrwxrwx 1 root root 3 May 17 22:45 /dev/cdrom -> sr0

i have 2 IDE devices. one cd rom and one cd rw


please help as this thing is driving me nuts

[DimGR]

48 reads and not a single reply?

[OErjan]

what does

dmesg|grep sr
and
dmesg|grep CD
and
dmesg|grep scsay?
put output here.
i have a feeling there might be a link pointing wrong

[DimGR]

what does

dmesg|grep sr
and
dmesg|grep CD
and
dmesg|grep scsay?
put output here.
i have a feeling there might be a link pointing wrong



dmesg|grep sr
sr0: scsi3-mmc drive: 52x/52x cd/rw xa/form2 cdda tray
Attached scsi CD-ROM sr0 at scsi0, channel 0, id 0, lun 0
sr1: scsi3-mmc drive: 77x/52x writer cd/rw xa/form2 cdda tray
Attached scsi CD-ROM sr1 at scsi1, channel 0, id 0, lun 0
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
Buffer I/O error on device sr0, logical block 1
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
Buffer I/O error on device sr0, logical block 1
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
Buffer I/O error on device sr0, logical block 1
end_request: I/O error, dev sr0, sector 0
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
Buffer I/O error on device sr0, logical block 1
end_request: I/O error, dev sr0, sector 0
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
Buffer I/O error on device sr0, logical block 1
end_request: I/O error, dev sr0, sector 0
sr0: disc change detected.




dmesg|grep CD
hdc: CDU5211, ATAPI CD/DVD-ROM drive
hdd: Memorex 52MAXX 2452AJ, ATAPI CD/DVD-ROM drive
Vendor: SONY Model: CD-ROM CDU5211 Rev: YYS7
Type: CD-ROM ANSI SCSI revision: 02
Type: CD-ROM ANSI SCSI revision: 02
Uniform CD-ROM driver Revision: 3.12
Attached scsi CD-ROM sr0 at scsi0, channel 0, id 0, lun 0
Attached scsi CD-ROM sr1 at scsi1, channel 0, id 0, lun 0


dmesg|grep sc
vesafb: scrolling: redraw
Using anticipatory io scheduler
ide-cd: passing drive hdc to ide-scsi emulation.
ide-cd: passing drive hdd to ide-scsi emulation.
ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device
scsi0 : SCSI host adapter emulation for IDE ATAPI devices
scsi1 : SCSI host adapter emulation for IDE ATAPI devices
sr0: scsi3-mmc drive: 52x/52x cd/rw xa/form2 cdda tray
Attached scsi CD-ROM sr0 at scsi0, channel 0, id 0, lun 0
sr1: scsi3-mmc drive: 77x/52x writer cd/rw xa/form2 cdda tray
Attached scsi CD-ROM sr1 at scsi1, channel 0, id 0, lun 0
Fix your initscripts?
scsi2 : SCSI emulation for USB Mass Storage devices
Attached scsi removable disk sda at scsi2, channel 0, id 0, lun 0
originally by Donald Becker <becker@scyld.com>
http://www.scyld.com/network/natsemi.html
EFS: 1.0a - http://aeschi.ch.eu.org/efs/
ts: Compaq touchscreen protocol output
Attached scsi generic sg0 at scsi0, channel 0, id 0, lun 0, type 5
Attached scsi generic sg1 at scsi1, channel 0, id 0, lun 0, type 5
Attached scsi generic sg2 at scsi2, channel 0, id 0, lun 0, type 0
sr0: disc change detected.

[OErjan]

hmmm, something seemnot 100% on the one caller sr0.

SONY Model: CD-ROM CDU5211 Rev: YYS7

it keeps saying:

Buffer I/O error on device sr0, logical block 0
Buffer I/O error on device sr0, logical block 1
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
Buffer I/O error on device sr0, logical block 1
and

sr0: disc change detected.

is that your cdrw? a far shot is that could it be the jumpers that are not set right OR the cable not 100% incerted. not likely though, another is the switch detecting that the drive is closed is somewhat faulty.

[DimGR]

so that means that the drive is faulty? i doubt it . It is not like i just installed it. Its been there long enough and it works ok under windows. I can even burn an iso image using the cdrw on linux. The problem is that i can not create an icon of it and have it mount whatever cd i insert it. For example , the other day i want to copy all the files from a cd to my home dir and i got the error i posted 3 posts up etc...

[DimGR]

hmmm, something seemnot 100% on the one caller sr0.

SONY Model: CD-ROM CDU5211 Rev: YYS7

it keeps saying:

Buffer I/O error on device sr0, logical block 0
Buffer I/O error on device sr0, logical block 1
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
Buffer I/O error on device sr0, logical block 1
and

sr0: disc change detected.

is that your cdrw? a far shot is that could it be the jumpers that are not set right OR the cable not 100% incerted. not likely though, another is the switch detecting that the drive is closed is somewhat faulty.

no this is not the cdrw
this is just the cd rom

[user unknown]

If you have two cd drives, you should create two links for them, for example:


/mnt/cdrom
/mnt/cd2


You normally mount only data-cds, and you may put them in one of those drives.
Of course you could put two audio cds in the drives, but that's another issue.

The 'dvd' - entry in your fstab is just a default, and not related to your cd rw.
Remove it.
Your drives are probably managed by a hd-controller.
/dev/hda is normally the first device on the first controller - your first harddisk.
If a cd-drive is connected at the same cable, it is /dev/hdb.
If not, your cd-drives are /dev/hdc and /dev/hdd.

For read-only data-cds you create according fstab-entrys:


/dev/hdc /mnt/cdrom iso9660 ...
/dev/hdd /mnt/cd2 iso9660 ...


The cd-writing needs a scsi-emulation. Therefor the name of the device is
/dev/sr0. But the message tells you to use the /dev/hdX - syntax though.
So you create a link /mnt/cdrw.
And an entry in fstab



/dev/hdX /mnt/cdrw auto defaults 0 0

for the beginning. (replace X by the right letter).

[mpeters13]

I am having a similar problem. I just performed a knoppix harddrive install. everything Works except for my cd-rom drives. I cannot mount either dvd or cdrw device.

Here is my fstab:
# /etc/fstab: filesystem table.
#
# filesystem mountpoint type options dump pass
/dev/hda1 / 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/cdrom1 /cdrom1 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/hda2 /mnt/hda2 auto noauto,users,exec 0 0
# Added by KNOPPIX
/dev/hdb1 /mnt/hdb1 ntfs noauto,users,exec,ro,umask=000 0 0


And here is what dmesg|grep sr returns:
matt@va-10:~$ dmesg|grep sr
Attached scsi CD-ROM sr0 at scsi0, channel 0, id 0, lun 0
Attached scsi CD-ROM sr1 at scsi0, channel 0, id 1, lun 0
sr0: scsi3-mmc drive: 20x/48x cd/rw xa/form2 cdda tray
sr1: scsi3-mmc drive: 40x/40x writer cd/rw xa/form2 cdda tray


I have no clue what is wrong. Help always appreciated.