Model Manufacturer Hitachi Manufacturer Part # HCP725032GLA380 Product Line CinemaStar Product Series P7K500 Performance Product Type Internal Hard Drive Form Factor 3.5-inch Capacity 320 GB Cache 8 MB Spindle Speed 7200 RPM Average Seek Time 14 ms Drive Interface Type SATA 3.0 Gbps Other Information Features 24x7 Operation HiVERT Technology Silent-Seek Acoustics Load/Unload Technology Internal Thermal Sensor SmoothStream Technology Advanced Power Management Thermal Flyheight Control (TFC)