AFAIK the HL-DT-ST GSA-T*** drives are OEM drives for Laptops that don't support booktyping. I have a GSA-T30L and it doesn't support it either and I tried everything. Those drives have other oddities, like no support for lower than MAX read speeds. It seems that HP (, Dell and other Laptop brands) wanted a drive that supports only the stuff that the software that ships with those Laptops (power2go) supports, to reduce support calls. When I asked them for a firmware upgrade because most modern 16x media are only burned at 2.4x, I was asked if i was actually burning with that crappy power2go coz otherwise there would be no support, and of course there is no newer firmware....