3TB Storage Capacity, 3.5" Form Factor, SAS II 6 Gb/s Interface, 128MB Cache, 7200 rpm, Up to 175 MB/s Sustained Data Transfers, 1.4 Million Hours MTBF, 8,760 Power-On Hours per Year, 0.63% Annualized Failure Rate (AFR), T10 DIF Protection Information Designed for capacity-optimized enterprise and bulk-data applications the 3TB Constellation ES.3 7200 rpm SAS II 3.5 Internal HDD from Seagate is a large form factor drive for demanding data growth. It offers a storage capacity of up to 3TB operates using a SAS II 6 Gb/s interface a 128MB cache and a rotational speed of 7200 rpm all of which help to ensure uninterrupted data transfers with a sustained data transfer rate of up to 175 MB/s. This drive also features high levels of reliability with 1 in 1015 non-recoverable read errors per bits read a 1.4 million hour MTBF 8 760 power-on hours per year and an annualized failure rate (AFR) of 0.63%. It is protected using T10's Data Integrity Field (DIF) a humidity sensor and PowerChoice technology.