411s and read errors?

I have a big problem when I burn a DVD.
if i try to make a copy later many of my dvd´s has errors I have tried many different media, and I have tryed making two dvd´s after each other. And when testing, only one have now errors…

What types of media have you used (post the media code please)?
What firmware are you using?
Can you post some Kprobe scans?