I bought a new pack of Verbatim DL disks. These look new and are in the orange pack and are 8x (up to 10x):
I usually buy these but they were out of stock:
With these new discs, my drive only writes to them at 2.4x, not the 4x I could with the other discs. I upgraded the firmware to A106 hoping that would fix it, but no luck. Is there any fix to this or am I stuck with this slow batch?