Drive Specifications. Seagate ST1000VNZ02 IronWolf 1TB, ST1000VN002 IronWolf 1TB, ST3000VN006 IronWolf 3TB, ST6000VN001 IronWolf 6TB, ST4000VN006 IronWolf 4TB, ST3000VN007 IronWolf 3TB, ST2000VN004 IronWolf 2TB, ST4000VN008 IronWolf 4TB