HGST 6TB SATAIII 128MB, RAID 24x7 RAID, ENTERPRISE, HUS726060ALE610 (RAID, ENTERPRISE ULTRASTAR 7K6000) 512n format available in 4TB and 2TB capacities supports legacy systems Advanced format 4Kn and 512e models 128MB cache buffer improves response time and data management 6Gb/s SATA 2M hours MTBF rating