Ditto! It is trying to burn your disk without errors. Cheap -R media needs to be burned at 4X on this beast and cheap +R can be burned at 8-12X.
My Staples -R media will not burn a full disk at speeds above 4X. The CMC E01 +R Staples media is the best media I have used to date in PIOs and BQs for quality. 95-98% quality and low errors.
Goes back to the formula; media+FW+software+Hardware+burn speed+setup=determine quality