Reading and Writing DVD media
 

I'm confused ...

I'm running FC3 and can read and write CD media quite reliably with a Sony
DRU-700A drive. Apparently, I can also write DVD media, and iso9660 with
Joliet extensions DVD that I burn under FC3 are reliably read on Windows (sorry!) b
oxes, including this same platform dual booted with the same hardware into Windows 2000.

However, I cannot persuade FC3 to fully read the same DVD media that it has just
burned ! I can read some files and usually a full directory listing, but many files
give an IO error. It is almost as if there is a barrier (I hope not at 650M :-))
beyond which the drive content cannot be read. And sure enough, this is what
we find in the syslog:

Mar 5 09:18:43 bok kernel: attempt to access beyond end of device
Mar 5 09:18:43 bok kernel: hdc: rw=0, want=3118460, limit=943820
Mar 5 09:18:43 bok kernel: Buffer I/O error on device hdc, logical block 779614
Mar 5 09:18:43 bok kernel: attempt to access beyond end of device

What is it that is giving the kernel false information about the size of this media?
Is this a known problem? Anyone have any suggestions, please?

First off, have you tried enabling "rock ridge" extensions for the DVD? (It's the linux equivalent of joliet). Also, can you read OTHER DVDs in that drive?

Hi Matir,

Yes, I have Rock-Ridge enabled. I don't have any other data DVDs to test this with to hand. Video DVDs seem OK from a data copy POV, but I've never been able to play video DVDs in Linux with that drive: I've always blamed flaky software for that, but now you mention it, maybe there is a connection there. Hmmm.

Oh and don't let the 'newbie' epithet fool you - this is just the first time I've felt moved to ask questions: Actually, I've been a UNIX internals person since edition 6 UNIX in 1980 or maybe earlier...