HGST Ultrastar 7K6000 | 0F23005 | 4TB 7200RPM 128MB Cache SATA 6Gb/s 3.5-Inch | 512e | ISE | Enterprise Hard Disk Drive Best-in-class random & sequential performance Reliable, field-proven, 7th generation 5-disk design 12Gb/s SAS and 6Gb/s SATA for compatibility with high performance data centers 128MB cache buffer improves response time and data management 2M hours MTBF rating & 5yr limited warranty