0F38356 WD Ultrastar DC HC550 16TB SAS 512 MB 3.5" Server HDD

High-Density 3.5in SAS Enterprise HDD for capacity tiers and secure data retention with the 0F38356

The 0F38356 is a WD Ultrastar DC HC550 datacenter internal drive designed to anchor nearline capacity pools where predictable latency, high sustained throughput, and 24x7 duty cycles are mandatory. As a 16TB 3.5in SAS HDD, the 0F38356 integrates cleanly into existing SAS backplanes and storage servers, providing a disciplined scale-out path for bulk storage without redesigning the host platform.

Architecturally, the 0F38356 targets balanced queue-depth behavior on SAS fabrics while sustaining sequential workloads typical of object storage and backup repositories. Its helium-filled design supports stable platter aerodynamics at 7200 RPM for consistent thermal and power characteristics, while datacenter-class recording (TDMR/EAMR) is engineered to preserve track integrity as areal density increases. The 0F38356 also supports 4Kn with 512e emulation to align with modern filesystem and RAID stripe planning, and the 512MB cache helps smooth bursty ingest patterns and metadata spikes in mixed read/write pipelines.

Why Choose the 0F38356?

The 0F38356 delivers a strong density-to-bay ratio for rack-scale JBOD shelves and SAS RAID groups, enabling administrators to expand capacity with minimal chassis footprint and predictable operational behavior. With hardware-based self-encrypting capabilities and datacenter reliability targets, the 0F38356 is suited for regulated environments that require secure decommissioning workflows and scalable, repeatable deployment across large drive populations.

WD designs Ultrastar platforms around long-life operation, controlled vibration tolerance, and compatibility with enterprise storage standards, prioritizing service continuity in multi-drive enclosures. This engineering approach supports consistent fleet behavior and simplifies qualification in modern data centre architectures.

Key Applications:

• Nearline capacity tiers
• Object storage repositories
• SAS JBOD expansion shelves
• RAID arrays in storage servers
• Backup and archive targets

At Happyware - Server Hardware you benefit from non-binding offers tailored to your storage architecture and rollout plan, helping you standardize the 0F38356 across projects with clear procurement alignment. For long-term infrastructure planning, you can also extend the warranty up to 6 years to match lifecycle and refresh policies.