0F38458 WD Ultrastar DC HC550 18TB SATA 512 MB 3.5" Server HDD

High-Capacity 3.5in Enterprise SATA HDD for Datacenter Storage Arrays with the 0F38458

The 0F38458 is a WD Ultrastar DC HC550 18TB 3.5in SATA datacenter HDD engineered for capacity-optimized tiers where predictable throughput, sustained duty cycles, and controlled latency matter more than flash-class IOPS. It integrates EAMR and TDMR recording technologies to extend areal density while preserving signal integrity, supporting dense rack storage nodes and large RAID groups without compromising long-term data stability.

Designed around a 7200 RPM platform with a 512MB cache, the 0F38458 fits common enterprise backplanes and controllers using the SATA interface, simplifying integration into mixed-generation server fleets. The 4Kn sector format with 512e emulation helps align modern file systems and object stacks while maintaining compatibility where required, and it is well suited to scale-out architectures that prioritize sequential bandwidth, efficient rebuild behavior, and operational consistency across high drive counts.

Why Choose the 0F38458?

The 0F38458 delivers a strong density-to-bay ratio for cloud and enterprise storage pools, enabling higher usable capacity per chassis and lower power per TB for always-on environments. With 24x7 duty cycle design and a 2.5M-hour MTBF profile, it supports reliable horizontal scaling across object stores, backup repositories, and general-purpose storage tiers where lifecycle cost and predictable serviceability drive deployment decisions.

WD designs Ultrastar platforms for datacenter operational discipline, emphasizing controlled acoustics and power behavior, robust error management, and firmware tuned for RAID and distributed storage patterns. The 0F38458 additionally supports SED hardware encryption with TCG Enterprise SSC to align with security baselines and compliance-driven data handling.

Key Applications:

• Capacity-optimized storage arrays
• Scale-out object and cloud storage
• Backup and archive repositories
• General-purpose server storage

At Happyware - Server Hardware you benefit from non-binding offers tailored to your storage node design and rollout plan, and you can secure an extended warranty up to 6 years to protect the 0F38458 investment across long refresh cycles.