From: Ben Fennema <bfennema@falcon.csc.calpoly.edu>
Message-Id: <200011231818.KAA18647@falcon.csc.calpoly.edu>
Subject: Re: PROBLEM: Cruft mounting option incorrect in ISOFS code
To: R.E.Wolff@BitWizard.nl (Rogier Wolff)
Date: Thu, 23 Nov 2000 10:18:13 -0800 (PST)
Cc: alan@lxorguk.ukuu.org.uk (Alan Cox),
        jeffery.s.peel@intel.com (Peel Jeffery S),
        linux-kernel@vger.kernel.org ('linux-kernel@vger.kernel.org')
In-Reply-To: <200011231004.LAA06628@cave.bitwizard.nl> from "Rogier Wolff" at Nov 23, 2000 11:04:48 AM
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Sender: linux-kernel-owner@vger.kernel.org

Rogier Wolff wrote:
> 
> Alan Cox wrote:
> > > under 1 gig in size.  You can exhibit the problem by mounting the dvd movie
> > > "The World is Not Enough" as it contains a video_ts.vob which is larger than
> > > 1 gigabyte.  You will see that most of the file lengths are incorrect due to
> > > the "cruft mounting option" hacking off the high order byte.  There are
> > > certainly many more movies out there that exhibit this problem so it would
> > > be a good thing for someone to fix.
>  
> > The cruft thing is correct in itself. The size being 4Gb is trivial
> > to change providing someone can provide a reference to the standards
> > that say its ok.  So is the limit 4Gig, who documents it ?
> 
> Page 137 of DVD Demystified by Jim Taylor says:
> 
>   - Individual files must be less than or equal to 1 gigabyte in length.

The maximum size of a single UDF extent is 2^30-1
For DVD Video, the data of each file shall be recorded in a single extent.

So thats where the limit comes from :)

Ben

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