uhm...  from CNET Shopping...  This Western Digital Raptor WD360GD .... Its data transfer rate of 150 megabits-per-second is relatively fast, compared to the typical hard drive. This Western Digital Caviar SE WD2500JD .... Compared to a typical hard drive, its data transfer rate of 150 megabits-per-second is relatively slow. This Western Digital Caviar SE WD1200JD .... Compared to a typical hard drive, its data transfer rate of 150 megabits-per-second is fairly standard. Well at least they cover all the bases "Goldie Locks and the Three Hard Drives"