burn

I've heard about the inner-ring markings in an unwritable section of some movies, and I have a few questions about it. Does this affect only HD DVDs and Blu-Rays, or does it also affect DVDs? Is there anyway to copy such discs with this protection, and have them playable in any blu-ray player...

I can't find any threads on this. I get 8000 kbs @ 4x or maximum burn speed and 11500 at 6x speed. Aren't these numbers closer to 2x and 3x? Or am I just mixed up on my b's and B's? What speeds are you all getting? Thankss, B