Public bug reported:
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
** Affects: util-linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/770362
Title:
DVD mount fails after multiple insertions and ejects
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