Western Digital Ultrastar DC HC550 18TB - 7200 RPM 512MB SATA III Enterprise HDD - WUH721818ALE6L4

The Western Digital Ultrastar DC HC550 18TB HDD sets a new standard for total cost of ownership (TCO) in data center environments. Built on a proven 9-disk HelioSeal platform, this drive delivers massive capacity while maintaining low power profiles. It is the industry’s first commercial implementation of Energy-Assisted Magnetic Recording (EAMR) technology, which improves writability and increases areal density, allowing for 18TB of storage in a standard 3.5-inch form factor.

Designed for heavy 24/7 workloads, the DC HC550 features a Triple Stage Actuator (TSA) for more precise head positioning, ensuring reliable performance even in high-vibration multi-drive server chassis. With a workload rating of up to 550TB per year and a 2.5 million hour MTBF, this drive is engineered to handle the most demanding big data, cloud storage, and hyperscale applications. Its SATA 6Gb/s interface ensures broad compatibility with enterprise storage systems.

• 18TB Capacity with HelioSeal Technology
• Energy-Assisted Magnetic Recording (EAMR)
• Triple Stage Actuator (TSA) for precision
• 7200 RPM Performance with 512MB Cache
• 2.5 Million Hours MTBF & 550TB/yr Workload Rating