Seagate Momentus 250 GB SATA 2.5 Inch 5400 RPM Version 4 Laptop Internal Hard Drive ST9250827AS 5,400 RPM Spin Speed, 8 MB Cache Buffer SATA 3.0Gb/s Interface, 250 GB Capacity Average latency 5.6 msec, Random read seek time 12.0 msec, Random write seek time 14.0 msec Applications; Mainstream laptops, Workstations, Gaming systems, Small form factor PCs, External boxes, Non-mission-critical blade servers 3 Year Warranty