Beng 1620 not recognize dvd-r

hi i have a 1620 with b7u9 and it does not recognize dvd-r
before b7u9 i have ew162i firmware in external enclosure.
the 1620 write dvd+r well. Someone can help me??

thanks in advance :a

I don’t really understand what you are doing. You have an REAL external EW162I drive with B7U9 firmware installed ??? You should be running 46L9 (don’t use 47N9 - bad CD-DVD Speed results).

The 47x9 firmware is optomized for a higher UDMA setting (DMA-3) than the B7x9 firmware that is limited to DMA-2…