I haven't posted here in a while, because all has been running great! But today I wanted to look at some photos I burned onto CDs a few years ago, but when I insert the CD I get this message...

Error mounting /dev/sr0 at /media/rich/disk: Command-line `mount -t "udf" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,iocharset=utf8,umask=0077" "/dev/sr0" "/media/rich/disk"' exited with non-zero exit status 32: mount: block device /dev/sr0 is write-protected, mounting read-only
mount: /dev/sr0: can't read superblock

It thinks the CD is udf? What the heck?

I'm running Linux Mint on Dell Inspiron 1300. No way did I burn these CDs in udf. What the heck?

Was the disk burned via windows or Linux? Windows 7 and I assume latter defaults to UDF.
Have you checked to verify if the disk is ISO 9660 vs UDF? file -s /dev/sr0
Does manually mounting as ISO9660 work?

These disks were burned with Ubuntu in 2007 and 2008. There is no reason why Linux Mint should now "see" them as udf, no reason I can think of anyway. I have read and copied from these disks several times since burning them to enjoy the photos I put on them. But now for whatever reason Linux Mint thinks the disks are udf. Weird?

Weird. Have you tried reading other disks?

I just tried a disk that I burned this January and it works perfectly fine. For some reason it 'sees' the older disks as udf. This is a puzzle.

Post the output of the file command posted earlier

udf or not, are they readable? It could be some weird permutation of CD rot, though, if that were the case, I'd expect them to be unreadable. I've had CD's rot, but, when they did, they were just dead and wouldn't read.

Also, if you can, try testing them in a Windows box, if you have one available, and let us know what happens.

I tried all the CDs I burned at that time, and some work but others don't. I guess it's CD rot, which is disappointing because I though CDs were supposed to be a stable, permanent way to store data.

Here is the error message again. I either get this message, or the computer is able to read the disk - one or the other. I have the photos stored on an external hard drive also. I'll print them from that source and save hard copies of them.

Error mounting /dev/sr0 at /media/rich/disk: Command-line `mount -t "udf" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,iocharset=utf8,umask=0077" "/dev/sr0" "/media/rich/disk"' exited with non-zero exit status 32: mount: block device /dev/sr0 is write-protected, mounting read-only
mount: /dev/sr0: can't read superblock

Thanks again. Lousy CDs.

Pressed discs like music and purchased software are permanent depending on storage conditions. Burned are guarenteed only 10 years or so again depending on storage conditions. Type of materials and quality are big factors. I think gold are the best. Long lasting optical media is being developed.

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