[GRLUG] Mounting DVDs

[Bob Kline]

A while back I downloaded a large
amount of archival material, and
wrote it on to DVDs, using K3b.
The system was Kubuntu 9.04,
with an ext3 file system.

A year or so latter I go back to
restore some of it to a hard drive,
on a new machine, running Kubuntu
9.10, using ext4, and find that only
some of the DVDs will mount.  About
25%.

I still have the original machine
around, so I tried mounting a couple
of the DVDs on it that won't mount
on the new system.  Worked fine.

I used the mount command

mount -t iso9660 /dev/sr0  /directory.

I also tried mount -t iso9660 /dev/dvd /directory.

Apparently specifying iso9660 should
not really be necessary, given the
fstab entry for the cd/dvd unit, and
in principle can simply use

mount /dev/dvd

That would be fine if it worked...

On occasion I'll see "no medium found
on /dev/sr0," the dvd unit.  Other times
I might see "can't read superblock," or
something thereabouts.  I gather that
indicates that the file system type is not
correctly determined.  But if I specify it,
that should not be an issue.

Suggestions?  Marginal DVD unit?

   -- Bob
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