The 18TB WD Ultrastar DC HC550 [0F38459] is an enterprise-grade drive suitable for data center use. A spacious HDD with a 512 MB cache memory uses a SATA III connection interface to speed up access to required data. It supports integration into a RAID array of drives and demonstrates a maximum power consumption of 6.5 W. In standby mode, the model consumes up to 5.6 W.

The WD Ultrastar DC HC550 [0F38459] HDD for NAS storage systems features a sealed, gel-filled enclosure with 18 TB of available storage capacity. Thanks to this solution, not only the power consumption of the disk is reduced, but its weight is also reduced.