Don't use udftools with WORM DVD media.

Giuseppe "Cowo" Corbelli weblog

Don't use udftools with WORM DVD media. Tue, Nov 27. 2007

I have to do a simple backup task to DVD-R using flexbackup on Linux 2.6. My first idea was to use packet writing: setup the media, mount as rw somewhere and write to it.

So I installed udftools (Debian package, version 1.0.0b3-12) and started to read docs. README.Debian states:

3) Write an empty session spanning the whole medium. It seems that without this step, any attempt to create the UDF filesystem will fail. DVD-RW: growisofs -Z /dev/hdc=/dev/zero

If applied to a non-rewritable media THIS PRODUCES A NICE COASTER!

Ok, just skip this step and go to the next, which should be

mkudffs --udfrev=0x0150 --spartable=2 --media-type=dvd /dev/pktcdvd/0

but this does not work, with error trying to change type of multiple extents.

In short, unless I'm missing something, this means YOU CANNOT USE UDF FILESYSTEM ON DVD-R MEDIA ON LINUX 2.6. Go for cdrecord/growisofs and ISO.

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