0F38357 WD Ultrastar DC HC550 16TB SAS 512 MB 3.5" Server HDD

High-Capacity 3.5in Enterprise SAS HDD for Data Centre Arrays with the 0F38357

The 0F38357 is a 16TB 3.5in internal enterprise HDD designed for server backplanes and storage shelves where predictable latency, sustained throughput, and 24x7 duty cycles are required. Built on a 7200RPM platform with a 512MB cache, the 0F38357 targets scale-out storage nodes and RAID sets that prioritise capacity efficiency while maintaining operational stability under continuous load.

For modern SAS infrastructures, the 0F38357 supports 4Kn sector architecture with 512e compatibility to align with mixed OS and controller requirements, enabling smoother transitions to advanced format without re-architecting the stack. EAMR with TDMR improves areal density while preserving read integrity, and the design is optimised for dense enclosures where rotational vibration can degrade array performance. Power profiles are tuned for enterprise duty (5.8W idle, 8.8W operating), supporting data centre energy planning without compromising capacity tier scaling. Self-encrypting drive (SED) support helps meet security baselines at the media layer in regulated environments.

Why Choose the 0F38357?

The 0F38357 delivers a practical density-to-bays ratio for capacity tiers in servers and storage arrays, reducing rack footprint for bulk datasets while maintaining enterprise reliability. With rotational vibration safeguards and a triple-stage actuator, the 0F38357 supports consistent RAID rebuild behaviour and scalable deployment across multi-drive shelves, making it suitable for growth-oriented architectures.

WD engineers the Ultrastar family with an emphasis on reliability metrics and predictable behaviour in data centre operating conditions. The 0F38357 aligns with standard SAS enterprise ecosystems and is validated for continuous operation, supporting long-lived platforms and controlled lifecycle management.

Key Applications:

• Bulk storage tiers in rack servers
• Backup and archive repositories
• Object storage nodes
• Capacity-optimised RAID arrays
• Log retention and compliance storage

At Happyware - Server Hardware you benefit from non-binding offers tailored to your deployment and an extended warranty up to 6 years to strengthen operational security for large-scale 0F38357 rollouts.