4TB, 3.5", SATA, 7200rpm, 6Gb/s, Buffer 64MB, 20 Pack
Western Digital Ultrastar 7K4000, 4 TB, 7200 RPM, 64 MB, 3.5", Serial ATA III
Western Digital Ultrastar 7K4000. Hard drive capacity: 4 TB, Hard drive rotational speed: 7200 RPM, Storage drive buffer size: 64 MB, Hard drive size: 3.5", Host interface: Serial ATA III