If the DVD player process ends from this, I'd say that's the fault of 
the player software not handling errors properly.

I think that if they are using the normal block layer accesses on the 
DVD device, there may be some retries that occur which are likely 
undesirable in this case since they will just stall playback. If they 
are using SG_IO to feed raw requests into the drive (which I imagine 
they need to do for CSS authentication, etc. anyway), then all error 

We don't know they're bad until we try and read them. How long the drive 
will stall trying to read that sector before giving up and returning an 
error is up to the drive. I'm not sure if the MMC command set allows any 
way to tell the drive to give up more quickly or not..

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/

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Normal apps like cp are ending because of Input/Output error. 
I did some researches and 
dd if=/dev/hdc of=image.iso conv=noerror,sync bs=1M 
does everything I want for whole Video Dvds. It skips unreadable blocks.
But I get recorded tv shows from friends and there is the same as with 
scratched dvds. Now the problem is that there are several .avi files on it. 

It would be enough that the drive does not report it as a error. If it would 

How can I figure this out? The best way would be a special command that all 
user apps can use which tells the drive to skip all of these bad blocks. With 
this you could turn it on if you want to watch movies where single bytes are 
not that important or turn it off if you want to have a identical copy of the 
dvd.

By the way, I am surprised that I am the only one who has problems with this.

Tobi
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dd works with files.


-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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