[calculon]

Yeesh, that sounds ugly. I'm not entirely sure that R-Studio will work in this case. I've used it in scenarios where the disk was still recognized in BIOS, but the volume wasn't readable in Windows. Disks that showed as Foreign in Disk Management, but couldn't be Imported. (usually with cartridge-mounted IDE drives, and USB enclosures that got hosed)

But it sounds like your hardware may actually be damaged (or irrevocably locked) if the BIOS won't see it. I've never been able to save data from a drive that a BIOS can't see. I would try plugging it into another computer/different Mobo just to be sure.