Date: Sun, 25 Nov 2007 18:32:45 +0000
From: Pavel Machek <pavel@ucw.cz>
To: Tobias <kaminsky@finswimmer.de>
Cc: Robert Hancock <hancockr@shaw.ca>, linux-kernel@vger.kernel.org
Subject: Re: [REQUEST] Option for skipping unreadable blocks on Video DVD
Message-ID: <20071125183245.GB5087@ucw.cz>
References: <fa.DNZjDdh1eNcFR2zDRKzQ6G2bIVU@ifi.uio.no> <473FC662.7020901@shaw.ca> <200711182334.52703.kaminsky@finswimmer.de>
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Hi!

> > 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
> > handling is passed up to the user application.
> 
> 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. 
> So I cannot use dd. 

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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