This item is for one Western Digital WD1001FAES-60Z2A0 DCM: HHRNHTJCBB (WCAT) Thailand 1TB 3.5" Sata HDD MAR/2011. This drive and all of our drives are professionally tested and cleaned on a DOD certified machine at Oem level. We do not use software for this process! Once they have passed our Quality control they are 100% in perfect working condition!