Someone I know is having this strange problem. His DW1640 burns DAXON AZ2 (BenQ branded DVD+R) fine at 8x. But when using Fujifilm ProdiscF01 DVD-R 8x, Nero first simulated at real 8x speed but just after the real burning has started, the drive spun up and paused a bit before started burning and the real-time speed had from that point dropped to 4x and remained 4x throughtout. This happened to every disc from the same spindle he has burned.
From the screenshots you will see that Nero tells the drive to burn at 8x but the drive somehow drops the speed to 4x. Any ideas of what causes this problem?
CDSpeed also burned this ProdiscF01 at 4x.
Latest firmware didn’t help.
This is where the drive paused, and the speed dropped to 4x. Looks like something happened during the burning of the Lead-in and caused the speed to drop.
Look at how Nero still thinks it is burning the disc at 8x! (Total time and Remaining time)
Now it knows.
This is DAXON AZ2. Burned fine at 8x.