Toshiba today announced that it had pushed the limits of the 2.5-inch hard drive even further with the introduction of a 640GB drive the "industry's largest" hard disk drive in that capacity. The MK6465GSX runs at 5,400 RPM and features an areal density of 528.5 Gbit/in2.

The MK6465GSX is part of a larger line of drives that also includes 500GB, 320GB, 250GB, and 160GB models. According to Toshiba, the drives are also 28-percent more energy efficient than their predecessors. They will begin shipping to manufacturers later this month.