Thirteen tested 3.5-inch Seagate SATA hard drives: eight IronWolf NAS ST4000VN008 drives and five enterprise-class ST4000NM0035 drives (four Terascale and one Exos 7E8). CrystalDiskInfo reports Good health on all thirteen, and every report shows zero reallocated sectors. Individual reports show 11,652–25,516 power-on hours; choose a specific serial from the gallery when ordering.