Hi, I try to read a DVD and get some strange errors (see below) when trying to access it on FS level (other DVDs work fine).
I can watch the DVD (xine), I can mount it, but when trying to access files in VIDEO_TS or with vobcopy I get the errors. I tried various DVD drives, everytime the same error. Is there any way to backup the data on the DVD?

Why can ogle play the DVD without erorrs?

Cheers. s

a few of many identical (sector number is always different) lines from /var/log/messages:

Nov 21 22:34:44 localhost kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
Nov 21 22:34:44 localhost kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
Nov 21 22:34:44 localhost kernel: ide: failed opcode was: unknown
Nov 21 22:34:44 localhost kernel: end_request: I/O error, dev hdc, sector 15768376
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It seems you're experiencing problems of DVD reading. May be installing libdvdread can fix such problem.
Xine has his own library (plugin) to read DVDs, this is the reason you are able to see your videos.
Hope this helps
Ciao

I don't think it is a simple configuration error. I have all libs installed which are somehow related to video processing. half of the software is compiled from CVS. Usually I know what I am doing, at least when it comes to video processing.

The problem is the DVD. It has a corrupted file system I believe. It is also un-rippable under windows and FreeBSD. There are two aspects to the problem:

1. The vendor has inadvertantly or willingly corrupted the filesystem in a way that the DVD is playable in DVD players (I tested five) and playable in PC DVD-drives with the usual software. Still, I cannot rip the DVD with the standard tools inunix or windows.

2. Under windows and FreeBSD, I get a nice meaningless error message and that's it. Under Linux my drive hangs. I cannot get the DVD out and the process which accesses the drive is in uninteruptable sleep for about 10min. That's not a very good behaviour.

-r

There are encrypted DVDs which you can mount but when try to copy the VTS files you get these errors. You can play them fine though.
This may be the case.

Playing is working because libdvdread knows what sectors to read and how. I try to explain it as simply as i can.

If you try dvdbackup,vobcopy it should rip fine.
I've read that vobcopy gives you the same error which is weird.
It should work fine, unless you don't have dvdcss installed.

> I've read that vobcopy gives you the same error which is weird.

no, because it is not a userland problem but a kernel problem. (At least I think so today after some more debugging and googeling)

> It should work fine, unless you don't have dvdcss installed.

I have everything installed. As I said, and not only on linux, but also FreeBSD and M$. It is definitively a (probably deliberately) corrupted UDF file system. I found some some hacks for winXP to rip the DVD and I hacked some more verbose printouts into the UDF FS linux kernel code and will try to ask my questions there.

Thanks a lot!

Cheers, -r