K3B is good, but I find, can't do everything. Your better off using the command line for the best results.
Enter cdrecord -scanbus, and look at what it tells you. It will find your dvd recorder
Here is my read cd command line:
cdrdao read-cd --device /dev/hdd --read-raw --datafile fifa2004.bin -v 3 fifa2004.toc
And here is my write to cd line:
cdrdao write --device /dev/hdd -v 2 Ella2.toc
I don't have much experience with dvd recording, but I think cdrdao and cdrecord can handle dvds as well.
Check out
www.tldp.org for Howtos