Seagate ST940814AS Momentus 5400.3 SATA Notebook Bulk/OEM Hard Drive 5,400 RPM Spin Speed, 8 MB Cache Buffer Serial ATA (SATA) Interface, 40 GB Capacity Average latency 5.56 msec, Random read seek time 11.0 msec, Random write seek time 13.0 msec Applications; mainstream laptops, tablet PCs, external 2.5-inch hard drives, printers and copiers, non-mission-critical blade servers 3 Year Warranty