Hard drive - internal Form Factor: 3.5" x 1/3H Dimensions (WxDxH): 4 in x 5.8 in x 1 in Weight: 1.3 lbs Capacity: 500 GB Interface Type: ATA-100 Data Transfer Rate: 100 MBps Average Seek Time: 8.9 ms Spindle Speed: 7200 rpm Buffer Size: 8 MB Manufacturer Warranty: 1 year warranty  (less)

spindle speeds, low seek times, high capacity and a 512 or 2048 KB cache buffer, all of which adds up to a fast data delivery system. And to protect your data, include Data Lifeguard, WD's exclusive automatic defect detection, and repair technology are included to enable our drives to actually fix themselves.  (less)