Not to be outdone by its competitors in pushing the maximum capacity of notebook hard disk drives, Western Digital has announced that it is shipping its 250GB Scorpio, a 5400 RPM 2.5-inch HDD intended for notebook computers. The hardware costs $199.99 and uses perpendicular magnetic recording to achieve the high bit-density. Western Digital has also employed special features to make the drive quiet, use less power and run at cooler temperatures: "ShockGuard" firmware and hardware protects the drive from failure if it"s jolted and "IntelliSeek," calculates optimum seek speed of the read/write head actuator, to help reduce noise and power.