WD Ultrastar DC HC680: Industry-Leading 28TB Capacity
The Western Digital Ultrastar DC HC680 is a 28TB enterprise hard drive that sets the industry standard for storage density. Using WD's advanced ePMR (energy-assisted Perpendicular Magnetic Recording) technology with OptiNAND, the HC680 delivers the highest capacity CMR drive available, making it the optimal choice for hyperscale datacenters, cloud storage, and enterprise bulk storage deployments.
Technical Specifications
- Capacity: 28TB
- Recording Technology: ePMR with OptiNAND
- Interface: SATA 6Gb/s or SAS 12Gb/s
- RPM: 7,200 RPM
- Cache: 512MB
- Sustained Transfer Rate: Up to 272 MB/s
- Workload Rating: 550TB/year
- MTBF: 2.5 million hours
- support: 5 years limited
OptiNAND Technology
The HC680 features WD's innovative OptiNAND technology, which integrates an iNAND UFS embedded flash drive alongside the rotating media. This flash storage is used to enhance drive performance and reliability by storing metadata, enabling larger sector sizes, and improving error recovery. The result is higher capacity, better performance, and improved reliability compared to traditional HDD architectures.
Datacenter Efficiency
At 28TB per drive, the HC680 enables significant infrastructure consolidation. A single 4U JBOD with 90 drives provides 2.52PB of raw storage, dramatically reducing the rack space, power, and cooling needed for large-scale storage deployments. The helium-sealed design further reduces power consumption per TB.
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