Seagate ST9100824AS 100GB 5400 RPM 2.5 INCH SATA Seagate Momentus 5400.2 ST9100824AS 100 GB SATA/150 Notebook Hard Drive General Features: 100 GB storage capacity 5400 RPM spindle speed 8MB buffer 12.5 ms average seek time Average latency: 5.6 ms SATA/150 interface Low power consumption for maximum battery life QuietStep ramp load technology for improved durability and inaudible load and unload acoustics 2.5-inch form factor