HGST Ultrastar HUC101212CSS600 0B25168 1.2TB 10K RPM SAS 6Gb/s 2.5" SFF 64MB Cache Internal Enterprise HDDThe high performance SAS 6Gb s interface delivers data reliability, availability and scalability and is the only small form factor SAS drive in the industry to pack a 64MB cache buffer for optimized read write response time. Features Highest capacity 10,000 RPM drive Field proven, reliable design Seamless extension to the C10K900 family High performance 6Gb s SAS for reliable data throughput Large 64MB cache buffer manages data efficiently