HGST Ultrastar 7K4000 4TB 7200 RPM 512n SAS 6Gb/s 3.5-Inch 64MB HDD Enterprise Hard Drive HUS724040ALS640 (0B26885) (Renewed)

- Doesn't work in personal computers - Only works in servers with SAS capable backplanes - 512n format, 512 native sector formatting works in legacy systems - 2M MTBF rating for reliable data storage necessary for enterprise environments