I flashed my OEM DW1620 to DW1620 retail version recently.I met a strange
question. I burned 2 Teon 8x DVD+R (ID:MCC 003)from the same Spindle.
the follwoing is the DVD+R burned by OEM driver(Firmware:G7C9) but scanned by DW1620 retail version(Firmware:B7P9).The result is acceptable.check Second picture of the following Link:http://forum.cdfreaks.com/showthread.php?t=117985
I burned the second DVD+R from the same spindle using firmware B7P9 and scan using B7P9.Very strange,the quality score drops to 70.is the result of updating fimware?
no prolly a defect in your disk look at the high pif spike.