0F38461 WD Ultrastar DC HC550 16TB SATA 512 MB 3.5" Server HDD

High-Density Enterprise 3.5in SATA HDD for 24x7 Bulk Storage with the 0F38461

The 0F38461 is a WD Ultrastar DC HC550 16TB internal enterprise HDD engineered for capacity-driven rack servers and storage shelves where predictable throughput and continuous duty cycles matter more than burst performance. As a 3.5in SATA platform, it integrates cleanly into common backplanes and HBAs, supporting large drive counts for software-defined storage nodes and scale-out backup tiers.

Architecturally, the 0F38461 balances areal density and sustained I/O by combining a 7200RPM design with a large 512MB cache and modern TDMR + EAMR recording, enabling consistent streaming behavior under mixed read/write patterns typical of object and backup workloads. Its helium-filled construction improves platter stability and power efficiency, while the 4Kn format with 512e emulation supports modern alignment requirements without breaking legacy OS and RAID compatibility. For data-at-rest controls, the 0F38461 implements a Self-Encrypting Drive model using TCG Enterprise SSC, aligning with enterprise key management and secure decommissioning processes.

Why Choose the 0F38461?

The 0F38461 is selected when capacity per bay, operational continuity, and fleet consistency are primary design goals. It delivers a strong density-to-power profile for high-drive-count enclosures and supports scalable deployment patterns in SDS, backup repositories, and archival tiers while maintaining enterprise reliability expectations, including a 2,500,000-hour MTBF for long-lived infrastructures.

WD designs the Ultrastar portfolio around controlled variability, qualification rigor, and predictable behavior in multi-drive environments. This engineering approach aligns with modern data center standards for serviceability, security governance, and long-term supply planning across heterogeneous storage stacks.

Key Applications:

• Software-defined storage
• Object storage
• Backup and recovery repositories
• Capacity-optimized file services
• Nearline archive tiers

At Happyware - Server Hardware you benefit from Non-Binding Offers tailored to your rollout size and platform requirements, helping you standardize on the 0F38461 across nodes and shelves with clear procurement planning.