try using the "disc quality" option, and scan the disc again. Your drive had problems reading the disc back, so that means there is a higher error rate. If you want a high quality back-up then you will have to choose a slower burn speed.
Benq DW-1640
ASUS 1608P2 >> Crossflashed to Pioneer 110 -> RAM+Bitsetting+removed riplock+RPC1
Boost Mobile stole my minutes, then would rather loose me as a customer than give back my minutes (thieves).
Benq DW 1640 and 1650 , Plextor PX-755, Pioneer BDR-208 and 209D, LG GH24NSC0, LG BH16NS40 and 16NS55, Liteon ihas 124F and 324F, Pioneer DVR-215 and S21, Samsung SH-224DB and 224GB, and some more