i have a sony DRU-820A
i had recently purchased a couple of MoserBaer 4X rewritables... but my drive does not permit me to write at a speed faster than 2.4x... any pointers??was able to write the same discs at 4x on a benq 1650 though...
Welcome to the forum
Providing that your drive is able to write RW discs @4x, maybe you need to update firmware