0B36051 WD Ultrastar 4TB SAS 256 MB 3.5" Server HDD

Datacenter-Class 3.5" Enterprise SAS HDD for 24x7 Bulk Storage with the 0B36051

The 0B36051 is a 4TB WD Ultrastar DC HC310 internal 3.5" HDD engineered for always-on server and storage platforms where predictable latency and sustained throughput matter more than peak burst performance. As a SAS-attached device, the 0B36051 integrates cleanly into enterprise backplanes and dual-ported storage domains, supporting resilient paths for high-availability designs and serviceable RAID layouts.

Designed around CMR recording and 7200 RPM mechanics, the 0B36051 prioritises consistent write behaviour in RAID rebuilds and multi-drive arrays, avoiding the performance variability often associated with alternative recording methods. The 4Kn format with 512e emulation enables modern sector alignment while maintaining broad controller compatibility, and the 256MB cache supports command queue efficiency and mixed random/sequential access patterns. For data-at-rest protection, the 0B36051 supports self-encrypting drive operation with TCG Enterprise SSC, aligning with secure decommissioning and compliance-driven storage policies.

Why Choose the 0B36051?

The 0B36051 delivers a pragmatic density-to-reliability balance for scale-out storage nodes, bulk capacity tiers, and general-purpose server storage where fleet consistency is critical. With datacenter-class design targets and 2.0M hours MTBF, the 0B36051 is suited to large RAID arrays and backup architectures that demand predictable maintenance windows, stable thermals, and operational continuity across 24x7 duty cycles.

WD builds Ultrastar platforms with an engineering focus on sustained workload integrity, robust error recovery behaviours, and compatibility with modern SAS infrastructure standards used in enterprise servers, JBODs, and storage enclosures. This approach helps organisations standardise on a dependable HDD baseline for capacity layers and long-life deployments.

Key Applications:

• Data center bulk storage
• RAID arrays
• Scale-out storage nodes
• Backup and archive tiers
• General-purpose server storage

At Happyware - Server Hardware you benefit from non-binding offers tailored to your infrastructure and deployment timelines, helping you specify the 0B36051 accurately for your controllers, enclosures, and RAID policy. For long-lived storage fleets, you can also extend the warranty up to 6 years to protect your investment across operational refresh cycles.