[RndTbl] burning large files
trevor at tecnopolis.ca
Thu Jun 2 15:55:52 CDT 2011
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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