WD Ultrastar Enterprise DC HC550 16TB 3.5 inch SATA 6Gb/s 7200rpm Ultra 512E SE NP3 512MB Cache Hard Drive (WUH721816ALE6L4)
WD Ultrastar Enterprise DC HC550 18TB 3.5 inch SATA 6Gb/s 7200rpm Ultra 512E SE NP3 512MB Cache Hard Drive (WUH721818ALE6L4)
WD Ultrastar Enterprise DC HC560 20TB 3.5 inch SATA 6Gb/s 7200rpm Ultra 512E SE 512MB Cache Hard Drive (WUH722020BLE6L4)
WD Ultrastar Enterprise DC HC570 22TB 3.5 inch SATA 6Gb/s 7200rpm Ultra 512E SE 512MB Cache Hard Drive (WUH722222ALE6L4)