Western Digital Ultrastar DC HC550 18TB - 7200 RPM 512MB SATA III Enterprise HDD - WUH721818ALE6L4
Western Digital Ultrastar DC HC550 18TB Enterprise HDD. 7200 RPM, 512MB Cache, SATA 6Gb/s. Features HelioSeal, Energy-Assisted Magnetic Recording (EAMR), and Triple Stage Actuator (TSA) for data centers.
Available in 4–6 business days : 8 pieces
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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
| Model Number | WUH721818ALE6L4 |
| Series | Ultrastar DC HC550 |
| Interface | SATA 6Gb/s |
| Capacity | 18 TB |
| Form Factor | 3.5 inch |
| Format | 512e / SE (Secure Erase) |
| Spindle Speed | 7200 RPM |
| Cache | 512 MB |
| Sustained Transfer Rate | 269 MB/s (257 MiB/s) |
| Average Latency | 4.16 ms |
| MTBF | 2,500,000 hours |
| Workload Rate | 550 TB/year |
| Power Consumption (Operating) | 6.5 W |
| Power Consumption (Idle) | 5.6 W |
| Operating Temperature | 5°C - 60°C |
| Non-operating Shock | 250 G (2ms) |
| Operating Shock | 50 G (2ms) |
| Acoustics (Idle/Seek) | 20 / 36 dBA |
| Technology | HelioSeal, EAMR, TSA |