146GB CHEETAH 15K.6 SAS 3.5 16MB ESG The Seagate Cheetah 15K.6 is the world's first self-encrypting hard drive with the highest sequential and transactional performance of any 3.5-inch drive in the enterprise market and delivers a 61 percent improvement in watts/GB at idle over the prior generation. Utilizing second-generation perpendicular recording technology, the Cheetah 15K.6 drive provides the highest 3.5-inch reliability in the industry at 1.6 million hours MTBF (0.55 percent AFR). The result is a star performer for mission-critical SAN, NAS, transactional processing and Internet applications.