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Silver 3.5 inch SAS hard drive with Ultrastar DC HC560 label

Western Digital

Western Digital Ultrastar DC HC560 20TB 3.5" 12Gb/s SAS 7200 RPM 0F38652

SKU CH-T7TP-ARNXQ MPN 0F38652

A 20 TB 3.5-inch internal hard drive with 7200 RPM and a 12Gb/s SAS interface for high-capacity storage

  • Interface12Gb/s SAS
  • Capacity20TB
  • RPM7200 RPM
  • Form Factor3.5"
  • 20 TB capacity stores massive datasets
  • 12 Gb/s SAS interface delivers high-throughput connectivity
  • 7200 RPM spindle speed supports consistent performance
  • 5 inch form factor fits standard drive bays
  • Ultrastar DC HC560 series built for enterprise reliability

Enterprise storage for scale-out workloads

The Western Digital Ultrastar DC HC560 is a 20TB 3.5-inch hard drive built for data-centre arrays that need high capacity in a standard form factor. It targets operators running dense storage clusters, backup repositories or cold-tier archives where cost per terabyte matters more than latency. Buyers needing low-latency transaction logs or boot volumes should consider solid-state alternatives.

12Gb/s SAS bus and mechanical limits

The drive connects through a 12Gb/s SAS interface, which caps sustained throughput at the link rate and shares bandwidth across expander topologies. Rotational speed is fixed at 7200 RPM, so random IOPS and access latency remain bounded by mechanical physics. Workloads demanding consistent sub-millisecond response or saturation of multiple 12Gb/s lanes will exceed what the spindle can deliver.

20TB capacity with OptiNAND headroom

OptiNAND technology adds embedded flash to offload metadata and improve write efficiency, letting the 20TB platter set absorb bursty ingest and rebuild traffic more smoothly. Sequential workloads such as backup streams or media archives fit comfortably within the available space. Extremely write-intensive, small-block workloads or deployments requiring multiple drive failures worth of spare capacity will exhaust the usable headroom faster.

Points forts

  • 20 TB capacity stores massive datasets
  • 12 Gb/s SAS interface delivers high-throughput connectivity
  • 7200 RPM spindle speed supports consistent performance
  • 5 inch form factor fits standard drive bays
  • Ultrastar DC HC560 series built for enterprise reliability

Caractéristiques

BrandWestern Digital
SeriesUltrastar DC HC560
ModelWUH722020BL5204
Part Number0F38652
Interface12Gb/s SAS
Capacity20TB
RPM7200 RPM
Form Factor3.5"
Poids d’expédition0.73 kg
Dimensions du colis152 × 102 × 51 mm

Questions sur cet article

Should I pick the 20TB Ultrastar DC HC560 or a smaller capacity for my storage array?

Choose the 20TB model when you need maximum density per 3.5" bay; the 7200 RPM spindle and 12Gb/s SAS interface keep throughput high even at full capacity.

What does the 7200 RPM rating deliver once the drive is installed in a server?

It provides consistent rotational latency for mixed read-write workloads, letting the 20TB platters sustain high sequential transfer rates across the 12Gb/s SAS link.

How does the 12Gb/s SAS interface affect real-world transfer limits?

The dual-port 12Gb/s SAS connection allows full-duplex traffic and multipath redundancy, so the drive can push sustained bandwidth without the interface capping performance.

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