Massive 18TB Capacity with Enterprise-Grade Reliability
Designed for data-intensive environments, this drive offers a substantial 18TB of storage in a standard 3.5" form factor, making it ideal for hyperscale data centers and enterprise storage systems.
Advanced Technologies for Performance and Efficiency
It incorporates Energy-Assisted Magnetic Recording (EAMR) and Triple Stage Actuator (TSA) technologies to enhance areal density and head-positioning accuracy, resulting in improved performance and storage efficiency.
HelioSeal® Technology for Cooler, Quieter Operation
The sixth-generation HelioSeal design replaces air with helium inside the drive, reducing turbulence, vibration, and power consumption while enabling higher capacity and reliability.
High-Speed Data Transfer and Robust Workload Rating
With a 7200 RPM spindle speed, 512MB cache, and up to 269 MB/s transfer rate, the HC550 supports up to 550TB workload per year, ensuring consistent performance under heavy data loads.
Built for Long-Term Use with Enhanced Durability
Featuring a 2.5 million hour MTBF, 600,000 load/unload cycles, and a 0.35% Annualized Failure Rate (AFR), this drive is engineered for long-term deployment in mission-critical environments.
| Model | WD Ultrastar DC HC550 |
| Part Number | WUH721818ALE6L4 |
| Capacity | 18TB |
| Cache Size | 512MB |
| Form factor | 3.5-Inch |
| Interface | SATA |
| Rotational Speed | 7200 RPM |
| Transfer Rate | up to 269MB/s |
| Dimensions | 147mm x 101.6mm x 26.1mm |
| Warranty | 5 Years of brand warranty |