http://en.wikipedia.org/wiki/DVD#Capacity Look at the wider of the three tables, it has the # in bytes. I didn't know -R and +R were different...
http://www.osta.org/technology/dvdqa/dvdqa6.htm
From the horse's mouth.
I can't find any information about UDF FS overhead, other than the fact that as you move to newer "builds", each type wastes more space, and as you move to newer versions of the spec, more space gets wasted. So a "plain" build UDF v1.02 filesystem will have the lowest-possible overhead.
Although, if you want to absolutely minimize overhead, don't put a filesystem on the disc at all. Treat it like a tape, and use tar as your filesystem :).
-Adam
-----Original Message----- From: roundtable-bounces@muug.mb.ca [mailto:roundtable- bounces@muug.mb.ca] On Behalf Of Trevor Cordes Sent: Thursday, June 02, 2011 15:56 To: MUUG RndTbl Subject: [RndTbl] burning large files
I need to burn a 5GB+ data file to DVD-DL, using command line tools in linux. Obviously burning small (sub 2 or 4GB) files to DVD is easy using mkiso and cdrecord, or whatever. Now I need to burn a large file and I'm discovering it's not so easy.
It turns out there's a file size limit for ISO9660 of 4GB.
Doing a bit of research, it looks like you must burn UDF format instead of ISO, but the UDF burning utilities on linux are limited.
mkisofs has options -udf and -allow-limited-size which may solve my problem, though the "alpha" labelling of it doesn't inspire confidence.
My other issue is I need to know exactly how much usable (non-FS) data space I get out of a DVD-DL. That number is well known down to the byte level for ISO9660 on DVD (single layer). I'm having a really hard time finding hard numbers for DVD-DL and UDF overhead. One would assume you get DVD-SL x 2 raw space. And one could probably guess at some reasonable overhead for UDF. Still, hard numbers will help me avoid coastering a multi-$$ DVD-DL blank.
Hopefully someone has some experience with this?
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