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Can't mount dvd, can't read superblock

Hello,

I've looked at a lot of posts with this error, but didn't seem to find a solution--or, admittedly, didn't understand some solutions to think them relevant (e.g. I don't know if this scsi vs. IDE device files is applicable http://forum.soft32.com/linux2/mount...pict46449.html -- i do not see ide-cd listed in lsmod).

This is the error:

Code:

# mount /dev/hda /mnt/dvd/

mount: block device /dev/hda is write-protected, mounting read-only

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

Code:

# mount -t iso9660 /dev/hda /mnt/dvd

mount: block device /dev/hda is write-protected, mounting read-only

mount: wrong fs type, bad option, bad superblock on /dev/hda,

      missing codepage or helper program, or other error

      In some cases useful info is found in syslog - try

      dmesg | tail  or so

Here's a look at my fstab:

Code:

# cat /etc/fstab

/dev/sda5        swap            swap          defaults        0  0

/dev/sda1        /                ext3          defaults        1  1

/dev/sda6        /usr            ext3          defaults        1  2

/dev/sda7        /home            ext3          defaults        1  2

/dev/hdb        /mnt/cdrom      auto          noauto,owner,ro  0  0

/dev/hda        /mnt/dvd        udf,iso9660  noauto,owner,ro  0  0

devpts          /dev/pts        devpts        gid=5,mode=620  0  0

proc            /proc            proc          defaults        0  0

tmpfs            /dev/shm        tmpfs        defaults        0  0

(I also tried replacing udf,iso9660 with "auto", and I receive the same error)

Code:

# dmesg | tail

end_request: I/O error, dev hda, sector 0

FAT: unable to read boot sector

hda: tray open

ATAPI device hda:

  Error: Not ready -- (Sense key=0x02)

  No reference position found (media may be upside down) -- (asc=0x06, ascq=0x00)

  The failed "Read 10" packet command was: 

  "28 00 00 00 00 10 00 00 01 00 00 00 00 00 00 00 "

end_request: I/O error, dev hda, sector 64

isofs_fill_super: bread failed, dev=hda, iso_blknum=16, block=16

dmesg | grep hda gives a whole lot of:

Code:

...

ATAPI device hda:

end_request: I/O error, dev hda, sector 532

hda: tray open

ATAPI device hda:

end_request: I/O error, dev hda, sector 528

hda: tray open

ATAPI device hda:

end_request: I/O error, dev hda, sector 532

hda: tray open

ATAPI device hda:

end_request: I/O error, dev hda, sector 0

hda: tray open

ATAPI device hda:

end_request: I/O error, dev hda, sector 64

isofs_fill_super: bread failed, dev=hda, iso_blknum=16, block=16

The tray is physically closed and unobstructed, if that is what that was getting at.

I have tried to mount from root. Relevant dev entries:

Code:

# ls -al /dev/ | grep hda

lrwxrwxrwx  1 root root        3 2009-04-14 13:39 cdrom -> hda

lrwxrwxrwx  1 root root        3 2009-04-14 13:39 cdrom0 -> hda

brw-rw----  1 root cdrom  3,  0 2009-04-14 13:39 hda

Code:

# cat /dev/hda

cat: /dev/hda: Input/output error

And a look at the hardware:

Code:

# lshw -short | grep dev

/0/100/1f.1/0/0        /dev/hda  disk          HL-DT-STDVD-ROM GDR8163B

/0/100/1f.1/0/0/0      /dev/hda  disk          

/0/100/1f.1/0/1        /dev/hdb  disk          HL-DT-ST GCE-8487B

/0/100/1f.1/0/1/0      /dev/hdb  disk          

/0/100/1f.2/0.0.0      /dev/sda  disk          40GB ST340014AS

/0/100/1f.2/0.0.0/1    /dev/sda1  volume        980MiB EXT3 volume

/0/100/1f.2/0.0.0/2    /dev/sda2  volume        36GiB Extended partition

/0/100/1f.2/0.0.0/2/5  /dev/sda5  volume        980MiB Linux swap / Solaris partition

/0/100/1f.2/0.0.0/2/6  /dev/sda6  volume        3914MiB Linux filesystem partition

/0/100/1f.2/0.0.0/2/7  /dev/sda7  volume        31GiB Linux filesystem partition

Thanks in advance for any suggestions.

Hi,

Lot of useful information! Except for which distribution along with the kernel being used. Newer kernels don't utilize the 'ide-cd' module.

Quote:

Lot of useful information! Except for which distribution along with the kernel being used.

Whoops! (And I thought I had been thorough.)
I'm running Slackware 12.2, kernel 2.6.27.7-smp.

Let me know if I should include anything else. Thanks!

Hi,

What type of media are you trying to mount from your cdrom? ISO?

Hmm, I _was_ trying to improperly mount an .iso I now realize, BUT it also gave me the same error for a video dvd (I have dvdlibcss, mplayer and mplayer codecs installed).

Code:

# find /usr/ -iname '*libdvdcss*'

/usr/lib/libdvdcss.la

/usr/lib/libdvdcss.so

/usr/lib/pkgconfig/libdvdcss.pc

/usr/lib/libdvdcss.so.2

/usr/lib/libdvdcss.so.2.1.0

/usr/local/src/libdvdcss-1.2.10-i486-2sl.tgz

/usr/doc/libdvdcss-1.2.10

/usr/doc/libdvdcss-1.2.10/libdvdcss.SlackBuild



# find /usr/local -iname '*mplayer*'

/usr/local/src/mplayer.tar.gz

/usr/local/src/mplayer

/usr/local/src/mplayer/mplayer-svn_20081215.tar.bz2

/usr/local/src/mplayer/mplayer.info

/usr/local/src/mplayer/mplayer.SlackBuild

/usr/local/src/mplayer-codecs-all.tar.gz

/usr/local/src/mplayer-codecs-all

/usr/local/src/mplayer-codecs-all/mplayer-codecs-all.SlackBuild

/usr/local/src/mplayer-codecs-all/mplayer-codecs-all.info

I think this was all I should need to be able to read an encrypted DVD, right? Even if I missed something, I thought it would still mount and then give me an error message about not reading the disk.

also, with the cd-rom, I can
# cat /dev/hdb
before mounting, and have it return all the data, but with the dvd

Code:

# cat /dev/hda

cat: /dev/hda: Input/output error

Regarding an .iso dvd, is there a way to mount if you don't know the .iso filename, instead of:

# mount -t iso9660 -o loop filename.iso /mnt/dvd

or is there a way to find out the name of the .iso? I tried putting it into a SUSE machine; it gets automounted and I'm not sure how to parse out the original iso name to try that.
Thanks!

Just checking in..
I still haven't resolved this; anyone have a hint or clue?
I read in another post to check

Code:

# modprobe loop                                            

FATAL: Module loop not found.

I can mount an iso from a cd though, just not from a dvd (dvd is readable/mountable on other machines).

Code:

# mount -t iso9660 -o loop /dev/hdb /media/cdrom

works! Though I cannot boot from this drive!?
# mount -t iso9660 -o loop /dev/hda /media/dvd

Code:

mount: wrong fs type, bad option, bad superblock on /dev/loop1,

      missing codepage or helper program, or other error

      In some cases useful info is found in syslog - try

      dmesg | tail  or so

and

Code:

# mount -t iso9660 -o ro,loop=/dev/loop0 /dev/hda /mnt/cdrom

mount: wrong fs type, bad option, bad superblock on /dev/loop0,

      missing codepage or helper program, or other error

      In some cases useful info is found in syslog - try

      dmesg | tail  or so



# dmesg | tail

Buffer I/O error on device hda, logical block 16

hda: tray open

ATAPI device hda:

  Error: Not ready -- (Sense key=0x02)

  No reference position found (media may be upside down) -- (asc=0x06, ascq=0x00)

  The failed "Read 10" packet command was: 

  "28 00 00 00 00 11 00 00 01 00 00 00 00 00 00 00 "

end_request: I/O error, dev hda, sector 68

Buffer I/O error on device hda, logical block 17

isofs_fill_super: bread failed, dev=loop0, iso_blknum=16, block=32

On a similar note, I cannot boot from the cdrom drive either...the same cd I originally installed slackware with.