0B36040 WD Ultrastar DC HC310 4TB SATA 256 MB 3.5" Server HDD

High-Density 3.5-inch Enterprise HDD for Capacity Tiers and RAID Arrays with the 0B36040

The 0B36040 is a 3.5-inch internal enterprise HDD engineered for always-on capacity tiers where predictable latency and sustained throughput matter more than flash-level IOPS. Built on WD Ultrastar DC HC310 architecture, the 0B36040 integrates cleanly into standard server backplanes via SATA, supporting consistent fleet deployment across storage nodes and bulk storage servers.

For controller compatibility, the 0B36040 uses Advanced Format 4Kn with 512e emulation, allowing modern platforms to optimize sector alignment while maintaining broad RAID/HBA interoperability. Its CMR recording behavior is designed for stable rebuild characteristics in RAID arrays and multi-drive enclosures, while a 256MB cache helps smooth burst activity typical of virtualization backup repositories and scale-out file/object storage. The 0B36040 targets sustained 24x7 duty cycles and serviceability expectations in rack environments, with Secure Erase support for controlled decommissioning workflows.

Why Choose the 0B36040?

The 0B36040 delivers a practical density-to-performance profile for enterprise capacity layers, combining 7200RPM mechanics, CMR consistency, and SATA ecosystem compatibility to scale predictably from single servers to multi-shelf arrays. With an MTBF rating of 2.0M hours, the 0B36040 is positioned for reliability-focused deployments where standardized spares, repeatable RAID behavior, and straightforward lifecycle management reduce operational risk.

WD designs Ultrastar platforms with data center qualification in mind, emphasizing controlled firmware behavior, continuous operation, and integration with common storage controllers. This engineering approach aligns the 0B36040 with modern rack standards that prioritize serviceability, power-aware operation, and consistent behavior across mixed workload windows.

Key Applications:

• RAID arrays in enterprise storage nodes
• Scale-out object storage
• Scale-out file storage
• Virtualization backup repositories
• Server bulk storage and capacity tiers

At Happyware - Server Hardware you benefit from non-binding offers tailored to your storage architecture and rollout scope, plus the option to extend the warranty up to 6 years to protect long-life capacity deployments built around the 0B36040.