yangxi, it's for DVD+RW
I'm pretty sure the lazy NEC engineers could have copied the 4x6x8x +R strategy to +RW if they could. Now they redesigned this strategy solely for RW, the two strategies are probably not interchangable.
The reason why 8x burns go like 4x6x8x is because of the speed limitations on 2500A. Lazy NEC engineers copied these junk strategies from 2500A to 3500, added new 12x and 16x strategies and calls it a new product. It's surprising that these obsolete designs still plague the latest NEC products all the way up to 3540. Hard to believe they can be this lazy! Even Liteon, who makes crappy writers, have implemented P-CAV on their latest series. NEC, you certainly suck.