Western Digital 640 GB 3.5-Inch, 32 MB Cache, 7200 RPM SATA II Bulk/OEM Hard Drive

Key Features

• Killer speed - Built on the performance bloodlines of WD Raptor, these 10,000 RPM drives, with SATA 6 Gb/s interface, and 32 MB cache deliver mind-bending performance. Not only are they 15% faster than the previous generation WD Raptor drives, but they also beat out all other competitors in the field.
• Rock-solid reliability - Designed and manufactured to mission-critical enterprise-class Standards to provide enterprise reliability in high Duty cycle environments. With 1.4 million hours MTBF, these drives have the highest available reliability rating on a high capacity SATA drive.
• Ultra-cool operation - Consumes less idle power and uses similar active power as the previous generation WD VelociRaptor, while offering double the capacity and higher performance.
• Rotary Acceleration Feed Forward (RAFF) - Optimizes operation and performance when the drives are used in vibration-prone, multi-drive chassis.
• NoTouch ramp load technology - The Recording Head never touches the Disk media ensuring significantly less wear to the recording head and media as well as better drive protection in transit.