Hd 7200rpm Para Notebook. Capacity 750 Gb (750 X 1 000 000 000 Bytes) Number Of Disks 2 Number Of Heads 4 Rotational Speed 7200 Rpm Rotation Time 8.33 Ms Average Rotational Latency 4.17 Ms Disk Interface Serial Ata/300 Buffer Host Max Rate 300 Mb/seconds Buffer Size 16384 Kb Average Seek Time 12 Ms Track To Track Seek Time 1 Ms Full Stroke Seek Time 20 Ms Width 70 Mm (2.76 Inch) Depth 100 Mm (3.94 Inch) Height 9.5 Mm (0.35 Inch) Weight 115 Grams (0.25 Pounds)