Western Digital Ultrastar DC HC550 18 TB HDD Server (3.5″ 26.1MM, 512MB, 7200RPM SATA ULTRA 512E SE NP3)

The 18TB UltraStar DC HC550 7200 rpm SAS-3 3.5″ Internal HDD from WD is a high-performance, large-capacity drive designed for enterprise environments that have intensive data and storage needs. This drive has a storage capacity of 18TB and a 3.5″ form factor with a SAS-3 12 Gb/s interface, rotational speed of 7200 rpm, and 512MB cache that help to ensure uninterrupted data transfers at speeds of up to 269 MB/s.