WUH722020BL5204 WD Ultrastar DC HC560 20TB SAS 512 MB 3.5" Server HDD

High-Density 3.5in Enterprise SAS HDD Storage Tiering with the WUH722020BL5204

The WUH722020BL5204 is a 20TB 3.5in internal enterprise HDD designed for capacity-optimised SAS tiers in modern rack servers and storage arrays where predictable latency and sustained throughput matter more than flash-class IOPS. Built for 24x7 duty cycles, it fits architectures that separate compute from bulk data, allowing CPU and GPU resources to be reserved for analytics, AI pipelines, and virtualised services while the storage layer delivers consistent sequential performance.

Within SAS backplanes and expanders, the WUH722020BL5204 integrates cleanly into PCIe-based HBA and RAID topologies, enabling scale-out shelves and dense JBOD deployments without disrupting existing controller standards. CMR recording with EAMR supports stable write behaviour under rebuild and ingest pressure, while 512MB cache helps smooth bursts typical of object storage gateways and backup streams. 4Kn with 512e compatibility provides flexibility for mixed OS and filesystem requirements, reducing migration risk when standardising sector formats across clusters.

Why Choose the WUH722020BL5204?

Choosing the WUH722020BL5204 supports a high capacity-per-slot strategy that improves density-to-performance balance in SAS-centric environments, from dual-socket servers to shared storage. The platform focus is operational continuity: consistent behaviour during heavy sequential writes, predictable rebuild characteristics, and a reliability profile aligned with large drive-count deployments where failure domains must remain controlled.

WD engineers the Ultrastar DC HC560 family for enterprise endurance and datacenter interoperability, pairing helium-filled mechanics with power-management features that align to modern chassis power budgets and serviceability standards.

Key Applications:

• Bulk storage tiers in servers and arrays
• Ceph and object storage repositories
• Software-defined storage capacity nodes
• Backup and archive targets
• HDFS-style data lakes

At Happyware - Server Hardware you benefit from non-binding offers tailored to your rollout plan for WUH722020BL5204 drive populations, and you can secure long-term platform stability with an extended warranty of up to 6 years for your WUH722020BL5204 deployments.