WD VelociRaptor 250 GB Workstation Hard Drive: 3.5 Inch, 10000 RPM, SATA III, 64 MB Cache - WD2500HHTZ Ultra fast - Designed around a 10,000 RPM spin speed, these SATA 6 Gb/s drives include a 64 MB cache and deliver the ultimate performance for photo and video editing Rock-solid reliability - With 1.4 million hours MTBF (Mean Time Between Failure), these drives have the highest available reliability rating on a high capacity SATA drive High capacity - State-of-the-art technology delivers a balance of high performance and high capacity perfect for data-intensive workloads that require large amounts of storage such as video editing, 3D rendering and scientific modeling 250 GB capacity holds up to 50,000 digital photos, 62,000 MP3 files, and up to 30 hours of HD video 5 year limited warranty