Seagate Technology announced it is shipping its 160GB Momentus hard disk drive for laptops. Touted by the company as the highest-capacity 2.5-inch drive on the market, it is Seagate's first laptop drive using perpendicular data recording. The Momentus 5400.3 is a 5,400 rpm drive with an Ultra ATA/100 interface, and features low power consumption and a high shock tolerance. A second version with Serial ATA is expected later this year. Also available in the Momentus line are 7,200 rpm and 4,200 rpm versions for performance and value applications (respectively).