Seagate 120GB 5400RPM 8MB SATA/150 2.5-Inch 9.5mm Notebook Hard Drive Seagate Momentus 5400.2 ST9120821AS 120GB SATA 1.5Gb/s Notebook Hard Drive 120 GB storage capacity Interface: SATA/150 5400 RPM spindle speed 8 MB buffer 5.6 ms average latency 12.5 ms average read seek time 9.5 mm drive height 2.5-inch form factorPower Specifications: +5V 0.48A Regulatory Approvals: CE MIC cUL C-Tick