Seagate ST6000NE000, 6TB IronWolf Pro 3.5", SATA3 NAS Hard Drive, SATA 6Gb/s, 7,200 RPM, 256MB Cache, 1,200,000 MTBF Hours, 05 Years Limited Warranty IronWolf™ Pro is designed for everything business NAS. Get used to tough, ready, and scalable 24×7 performance that can handle multidrive environments across a wide range of capacities.