WD Desktop 1 TB SATA Hard Drives ( WDBH2D0010HNC) Product Specifications Interface SATA 6 Gb/s Performance Specifications Rotational Speed 7,200 RPM (nominal) Buffer Size 64 MB Transfer Rates Buffer To Host (Serial ATA) 6 Gb/s (Max) Physical Specifications Formatted Capacity 1,000,204 MB Capacity 1 TB User Sectors Per Drive 1,953,525,168