Drive has NETAPP PN (secondary PN, drive is HGST HUS724040ALE640 This Drive has at or under 100 power-on hours Drives are tested by our technicians using a Super Micro Super Server that has a C612 Chipset. The Server runs SCSI Toolbox Version 9.2 software. All our tested hard drives data is logged by their serial number and kept on record. We guaranty these drives to be fully functional.