Description, Specifications for WD 20TB Ultrastar DC HC555
Western Digital Ultrastar DC HC555 – 20TB SATA
The Western Digital Ultrastar® DC HC555 20TB SATA is the pinnacle of high-capacity enterprise drives, built for organizations managing massive-scale workloads in cloud, hyperscale, and enterprise data center environments. Featuring energy-assisted PMR (ePMR), HelioSeal® technology, and a robust 3.5-inch form factor, this drive maximizes storage density without sacrificing power efficiency or reliability.
With an enormous 20TB capacity, the HC555 allows IT teams to increase storage per rack while maintaining consistent IOPS, throughput, and availability. Engineered for 24x7 operation, this drive is ideal for object storage, distributed file systems, surveillance storage, and backup/archive solutions.
- Massive 20TB capacity using ePMR and HelioSeal®
- Optimized for high-volume, low-latency data center workloads
- Industry-leading 2.5 million-hour MTBF and 5-year warranty
- Reduces power usage and cooling requirements with helium design
Specifications – 20TB Ultrastar DC HC555
| Attribute | Specification |
|---|---|
| Model Number | WUH722020CLxxyz |
| Form Factor | 3.5-inch |
| Interface | SATA 6 Gb/s |
| Capacity | 20TB |
| Recording Technology | CMR (Conventional Magnetic Recording) |
| Drive Technology | Helium |
| Sector Format | 512e / 512 |
| Areal Density (max) | 1137 Gbits/in² |
| RV Sensors | Yes |
| Cache Size | 512 MB |
| Rotational Speed | 7200 RPM |
| MTBF | 2.5 million hours (projected) |
| Warranty | 5 years |
| Power - Idle | 5.6 W |
| Power - Operating (typical) | 6.9 W |
| Dimensions (L x W x H) | 5.787" x 4.0" x 1.028" |
| Weight | ~715g |
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