Seagate Momentus 7200.4 250 GB 7200RPM SATA 3Gb/s with NCQ 16MB Cache 2.5 Inch Internal NB Hard Drive ST9250410ASG-Bare Drive with G-Force Protection 7200 RPM Spin Speed, 16 MB Cache Buffer, SATA 3Gb/s interface with Native Command Queuing, 250 GB Capacity G-Force Protection feature adds another layer of robustness for road warriors. QuietStep technology enables ultra-quiet load/unload acoustics Support for S.M.A.R.T. drive monitoring and reporting. Two Year Warranty Leverages Seagate laptop power management technology and utilizes ramp load features that remove the head from the disk during idle periods 7200 RPM Spin Speed, 16 MB Cache Buffer, SATA 3Gb/s interface with Native Command Queuing, 250 GB Capacity G-Force Protection feature adds another layer of robustness for road warriors. QuietStep technology enables ultra-quiet load/unload acoustics Support for S.M.A.R.T. drive monitoring and reporting Leverages Seagate laptop power management technology and utilizes ramp load features that remove the head from the disk during idle periods