Hitachi started its week today with what it says is the fastest professional 10,000RPM hard drive. While spinning at the same speed as rivals, the 600GB Ultrastar C10K600's 64MB of cache and optimizations help it transfer data about 15 percent faster in random seeks and 18 percent faster sequentially than the previous (though unnamed) best. Although more energy-saving than a usual desktop drive by its notebook-sized 2.5-inch design, newer power management also makes it about 22 percent more efficient than a rival.