Comment 2 for bug 449960

You are not using original software but a defective fork that only
occasionally writes DVDs. A well known fact about the fork (wodim)
you are using is that it does not support to write dual layer DVDs at
all because it does not know how to handle the specifics of dual layer
DVDs. This is a result from the fact that the working DVD support from
the original cdrecord has been ripped off and replaced by something
half baken in the fork.

If you replace the broken fork by the original software, see:

ftp://ftp.berlios.de/pub/cdrecord/alpha/
http://cdrecord.berlios.de

http://cdrecord.berlios.de/private/linux-dist.html

you should be able to write this medium in case that your writer
implements support for the specific media you are using.