WD  Caviar Black 1 TB SATA II, 32 MB Cache, 7200 RPM, 3.5-Inch Internal Hard Drive WD10000LSRTL - Retail Dual processor: Twice the processing power to maximize performance. The motor shaft is secured at both ends to reduce system-induced vibration and stabilize platters for accurate tracking The recording head never touches the disk media ensuring significantly less wear to the recording head Massive Capacity: WD Caviar Black SATA drives are available in capacities up to 1 TB.