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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.
| 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 |
