I thought that BenQ was making some of the I/O Magic drives. Is this the model that has LightScribe? If so it might be the dw1655.
When I was tracking down FW GCAB that came on my OEM dw1655 there were a lot of references to I/O Magic.
DRU500A-2.1A, DRU710A-BYX5, PX716A-1.11, DW1655-BCIB, LH-20A1H-LL0C, GMA-4080N-0S35