Yeah, basically to sum up what flash67 said, even on a Linux box, it still does not show the PS3 Game side of the HDD, as its encrypted (or in a non-common filesystem). I would not expect anyway around this anytime soon, or, at least until we can control the hypervisior, and use it to access the PS3 HDD!
Kutibah - > Reformat your drive, the other ways around, and it will work (10gb for PS3, alas, resulting in data loss however!)