I have recently bought a WD caviar green 1.5TB HD and filled it with 500GB of things on a friends XP machine where it worked perfectly. Now that I have installed it in my home pc in both XP and Windows7 64bit boot the OS claims it is a empty floppy disk drive.
in my computer it would seems to be a floppy drive and in the device manager it says under Disc drives that I have my boot drive and a WDC WD15EADS-00S2B0 ATA Device and it claimes to be working properly