[Bug 770362] Re: DVD mount fails after multiple insertions and ejects

[Phillip Susi]

11.04 has reached end of life, have you been able to reproduce this on
12.04+?


** Changed in: util-linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/770362

Title:
  DVD mount fails after multiple insertions and ejects

Status in “util-linux” package in Ubuntu:
  Incomplete

Bug description:
  Binary package hint: util-linux

  Mounting a DVD normally works as expected, however sometimes, after
  inserting and ejecting multiple DVDs in a row the system seems to get
  confused and will no longer automatically mount DVDs and not even
  allow manual mounting. This then looks like:

  $ sudo mount /dev/scd0 /mnt
  mount: block device /dev/sr0 is write-protected, mounting read-only
  $ ls -l /mnt
  total 0
  $ sudo umount /mnt
  umount: /mnt: not mounted

  The first command looks like it is working, expect it doesn't actually
  do anything. The directory stays empty, umount complains about nothing
  being mounted and both 'mount' and 'df' don't show the DVD drive being
  mounted either. There are no error messages from 'mount' or in
  'dmesg', it is like the first mount command never happened.

  Only output of dmesg I could find that might be relevant is:

  [20483.289177] VFS: busy inodes on changed media or resized disk sr0
  [20625.873006] ISO 9660 Extensions: Microsoft Joliet Level 3
  [20625.967061] ISO 9660 Extensions: RRIP_1991A

  When the system is in this state I can still do a "dd if=/dev/scd0
  of=out.iso" and can a regular ISO image without any problem, only the
  actual mounting of /dev/scd0 is not working.

  I think it is possible to let the system get back into a sane state by
  inserting the last DVD on which it worked normally, but that might
  just be coincidence.

  I haven't yet figured out a proper way to reproduce it, but so far it
  has shown up a few times when inserting multiple DVDs one after
  another.

  My current system is Ubuntu 11.04, but I have seen the issue before in
  10.10, the problem seems have appeared when Ubuntu started to allow
  ejecting DVDs without previously umounting manually them.

  util-linux is 2.17.2-9.1ubuntu4

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