ST9808212AS - Seagate Momentus 5400 PSD ST9808212AS 80 GB 2.5 Plug-in Module Hard Drive - SATA/150 - 5400 rpm - 8 MB Buffer

The Momentus 5400 PSD drive is a 2.5-inch drive designed with the Microsoft Vista OS in mind. By designing in a 256-MB flash memory to act as a large holding tank for frequently accessed data, the Momentus 5400 PSD drive will boot laptop PCs quickly and resume from hibernation almost instantly. The Momentus 5400 PSD drive and Windows Vista can analyze the laptop usage pattern, pin frequently used files in the flash and predict your next move. This technology allows the drive to operate out of flash with the disks spun down to conserve power. When the Momentus 5400 PSD drive operates out of the flash with the spindle motor powered off (hybrid mode), the drive becomes incredibly robust in highly mobile environments.