Western Digital WD2500JS 250GB SATA2 7200rpm 8MB Hard Drive Specifications Mfr Part Number: WD2500JS Capacity: 250 GB Rotational Speed: 7200 rpm Cache: 8 MB Interface: SATA 300 Max. External Transfer Rate: 300 MB/s Seek Time: Read: 8.9 ms Track to Track: 2.0 ms Full Stroke: 21.0 ms Shock: Operating (Read): 65G @ 2ms Non-operating: 250G @ 2ms Dimensions (WxLxH): 4 x 5.787 x 1.028 inch / 101.6 x 147 x 26.1 mm Weight: 1.32 lbs / 0.6 kg * Note: The product specification and pictures are subject to change without notice.