WD  Caviar Black 1 TB SATA III 7200 RPM 64 MB Cache Internal Desktop 3.5" Hard Drive (WD1002FAEX ) (Old Model) WD Caviar Black high performance 3.5- Inch SATA hard drive combines 7200 RPM, 64 MB cache, and SATA 6 Gb/s interface for the ultimate in power computing. High performance electronics architecture features dual processors and bigger, faster caches for maximum read and write speeds. StableTrac The motor shaft is secured at both ends to reduce system-induced vibration and stabilize platters for accurate tracking, during read and write operations. 5 year limited warranty.