Product Name4TB Constellation ES.3 3.5' 7200RPM SAS 3 12Gb/s Hard Disk Drive with 128MB Cache Product TypeHard Drive Buffer128 MB Product FamilyConstellation ES.3 Drive InterfaceSAS Drive Width3.5' Drive Interface Standard12Gb/s SAS Drive TypeInternal Storage Capacity4 TB Rotational Speed7200 rpm Green CompliantYes Green Compliance Certificate/AuthorityRoHS Maximum External Data Transfer Rate768 MBps (6 Gbps) Height1' Width4' Depth5.8' Product SeriesES.3 Product ModelST4000NM0034 Product LineConstellation Average Latency4.16 ms FeaturesPowerChoice Technology RAID Rebuild Secure Erase Low Power Consumption Ramp Load Technology Limited Warranty5 Year