[RndTbl] burning large files

Adam Thompson athompso at athompso.net
Thu Jun 2 16:54:36 CDT 2011

Look at the wider of the three tables, it has the # in bytes.  I didn't 
know -R and +R were different...

>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 :).


> -----Original Message-----
> From: roundtable-bounces at muug.mb.ca [mailto:roundtable-
> bounces at 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?
> Thanks!
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