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Old 03-05-2005, 04:05 AM   #1
elsabio
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Registered: Mar 2005
Location: england
Distribution: handbuilt (reliable), FC3 (flakey as a piecrust)
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Question 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?

Last edited by elsabio; 03-05-2005 at 04:48 AM.
 
Old 03-05-2005, 10:18 PM   #2
Matir
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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?
 
Old 03-06-2005, 06:25 PM   #3
elsabio
LQ Newbie
 
Registered: Mar 2005
Location: england
Distribution: handbuilt (reliable), FC3 (flakey as a piecrust)
Posts: 9

Original Poster
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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...
 
  


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