WUH721816AL5204 WD Ultrastar DC HC550 16TB SAS 512 MB 3.5" Server HDD

High-Density 3.5-inch Enterprise SAS HDD featuring helium EAMR/TDMR architecture with the WUH721816AL5204

The WUH721816AL5204 is a 16TB 3.5-inch datacenter internal HDD engineered for capacity-centric server and storage platforms, delivering predictable throughput and sustained duty operation in 24x7 environments. As a SAS single-port drive with 512e sector formatting, the WUH721816AL5204 integrates cleanly into enterprise backplanes and RAID controllers, supporting standardized provisioning, monitoring, and replacement workflows across scale-out racks.

Designed around a helium-sealed enclosure with EAMR and TDMR recording technologies, the WUH721816AL5204 targets dense storage tiers where efficiency, vibration tolerance, and rebuild behavior matter more than peak IOPS. The 7200RPM spindle and 512MB cache balance sequential performance for backup, object/file repositories, and capacity-focused virtualization datastores, while the SAS transport provides robust command queuing and end-to-end integrity features expected in shared infrastructure. For architects building SDS clusters or RAID arrays, the WUH721816AL5204 supports consistent latency under mixed streaming and metadata activity, simplifying node-level sizing and growth planning.

Why Choose the WUH721816AL5204?

The WUH721816AL5204 is optimized for high TB per rack unit with enterprise reliability, making it a pragmatic choice for storage tiers that scale horizontally without sacrificing operational consistency. Its design aligns with standardized service procedures, predictable power behavior, and long-life deployment models, enabling controlled expansion from small arrays to multi-petabyte pools.

WD’s Ultrastar engineering prioritizes datacenter-grade endurance, rigorous qualification, and interoperability with modern SAS storage ecosystems. Built for continuous operation, the platform supports reliable data retention, secure lifecycle handling, and integration with monitoring and asset management practices common in enterprise environments.

Key Applications:

• Scale-out object storage
• File storage tiers
• Backup and archive repositories
• Capacity-focused RAID arrays
• Software-defined storage clusters

At Happyware - Server Hardware you benefit from Bulk Order Discount options for large-scale WUH721816AL5204 rollouts and non-binding offers tailored to your storage architecture, helping you standardize capacity expansion with predictable procurement.