WD Purple 6TB Surveillance Internal Hard Disk Drive

Capacity: 6tb interface: sata iii 6 gb/s form factor: 3.5-inch rotation speed: 5400 rpm cache memory: 256 mb average latency: 5.55 ms data transfer rate: up to 175 mb/s reliability rating: mtbf (mean time between failures) 1 million hours operational shock: 30 g @ 2 ms non-operational shock: 250 g @ 2 ms operating temperature: 0°c to 65°c (32°f to 149°f) non-operating temperature: -40°c to 70°c (-40°f to 158°f) noise level: 25 dba (idle), 29 dba (seek) vibration: 0.67 g (operating), 1.04 g (non-operating)