Western Digital Ultrastar DC HC550 18TB 7200RPM SATA 512MB 3.5" Hard Drive

Ultrastar DC HC550 18TB enterprise drive

The Western Digital Ultrastar DC HC550 is a 3.5-inch internal hard drive built for desktop and server environments that demand high capacity. It spins at 7200 RPM and provides 18TB of storage through a SATA interface with a 512MB cache buffer.

Suited for bulk storage arrays

This drive fits users who need a single large volume for backups, media libraries or cold data tiers where sequential throughput matters more than random access speed. Buyers who require low-latency transactional performance or solid-state responsiveness should consider flash-based alternatives instead.

SATA 6Gbps interface with 512MB cache

The SATA connection and 512MB cache determine how the drive integrates with host controllers and handles burst transfers. Average latency is rated at 4.16ms, reflecting the mechanical 7.2K rotational speed.