#32 kernel freeze when mouting DVD

[Anonymous]

It does not look like any of the developers is reading
these bugs, but I'll submit anyway.

When I mount a multi-session DVD disk created on
Windows using Nero the system freezes.

When I mount in text mode I can actually see what's
going on - there is an endless loop of printk's running
on my screen yelling - "__find_get_block_slow() failed".

My system : FC2, kernel 2.6.7, ATAPI DVD drive, no scsi
emulation.

Same disk reads OK on Windows. Reading CDROMs works OK.

[Nobody/Anonymous]

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One more comment - DVD was created using Nero Express 6. DVD
drive is LITE-ON DVDRW SOHW-812S

[Pat LaVarre]

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user_id=964855

Offline we were also told:

Nero Express 6, which was bundled with my LITE-ON DVDRW SOHW
-812S. on windows of course. Create a multi-session DVD.

At first, I did not close the session and when I saw this problem I thought
that closing the session would help, but it did not.

I'm going to try to create a not multi-session DVD and post the result.

[Pat LaVarre]

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user_id=964855

I raised the priority here to match the related bug:

[ 1008156 ] multi-session starts where
https://sourceforge.net/tracker/?
func=detail&aid=1008156&group_id=295&atid=100295

[Nobody/Anonymous]

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Update - sorry guys, but it turns out that the disc was
iso9660, not udf.

My mistake.

It's still a bug, though - I belive udf should report an
error message and fail, instead of running in infinite loop.

[Nobody/Anonymous]

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I think now in linux_udf discussion we've been told -t udf -o session=$n
works around this trouble. It is only the default mount of multi-session
that we're hoping to fix.

[Nobody/Anonymous]

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I think at linux_udf we've been told,

-o session=$n works around the infinite loop in the kernel reported here.

It is only the default mount of multi-session that we're hoping to fix.

[Chen-Li Tien]

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user_id=770983

I also encounterd this problem with a DVD+R I burned. I
burned it with K3B and it can be mounted properly before I
add files so the total size reached 4GB. K3B (In fact,
mkisofs) doesn't allow generate DVD image larger than 4GB. I
cannot close the disc now. Is there udf file system limit?

I created this DVD+R in K3B and select UDF/Rock Ridge/Joliet
(all 3) file systems on it burner is LG HL-DT-ST DVDRAM
GSA-4040B.

Now I must disable the "automatically mount removable media"
option in FC4.

Sincerely,
ChenLi Tien

[Nobody/Anonymous]

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This MIGHT help: Try specifying session 0 and any of the anchor points for the session that you really want to mount. For example, to mount session 1 on my example disc I use:

mount -t udf -o session=0 -o anchor=601407 /dev/hdc /mnt

For more information see the comments of this bug:

http://sourceforge.net/tracker/index.php?func=detail&aid=1008156&group_id=295&atid=100295

I hope this helps someone.