Seagate ST12000NT001, 7,200RPM, SATA III 6Gb/s, 3.5in, 12TB capacity, AgileArray, 256MB cache, Tough, ready, and scalable. IronWolf drives are NAS-optimized for 24x7 in NAS enclosures. Tuned with AgileArray and multi-user technology, IronWolf allows you to do more with your NAS with unlimited bays