Gizmodo: "Offering 250GB, 320GB and 500GB options, Seagate's hybrid Momentus XT HDD is allegedly the world's fastest 2.5-inch drive for laptops (breaking their previous record), and comes in at a shade over 100 bucks.
The hybrid drive is 80 per cent faster than the usual 7,200rpm drive, and up to 100 per cent faster than a 5,400rpm one, with 4GB of SSD capacity and 32MB of DDR3 cache memory. It's not quite as fast as straight SSDs, but are a heck of a lot faster than the usual HDD—and at that price, you can't complain."