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From: "Josh Carroll" <josh.carroll@psualum.com>
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References: <539c60b90611040831l3101a720i6cb87ee1cb8272ad@mail.gmail.com>
	<454CC513.10707@zedat.fu-berlin.de> <454CED88.1070500@bitfreak.org>
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	"O. Hartmann" <ohartman@zedat.fu-berlin.de>
Subject: Re: read cd's but not dvd's?
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> That would probably be because DVDs use the UDF format.  ISO9660 is only
> for CDs.

Actually, you can mount some DVDs with mount_iso9660, but obviously it
won't work properly for large files.

Note that I don't think you can just mount a commercial DVD with
mount_udf and start copying .VOB files off if it. You'll need to use
something like libdvdread, etc. I had the same problems with my DVD
drive, and thought it was my hardware or a kernel bug, but it's simply
not possible to read files off an encrypted DVD after mounting with
mount_udf.

Josh