Only in Windows 7 at the install screen. Even after a fresh install and adding updates, it won't see it. However, if I plug drive in as slave, xp sp3 will recognize the full capacity. Bios recognizes full capacity and all the partitioning softwares recognize the full 320GB. Ironically, I can only access 137 gb. This makes me wonder about the 48bit LBA. But this can't be the case since everything else sees it, right? Why won't windows 7 see the hard drive's full capacity but other OS, partitioning softwares, and the bios recognize the full 320gb? Trying to install Windows 7 x86 Ultimate.