0B36016 WD Ultrastar 4TB SAS 256 MB 3.5" Server HDD

Enterprise 3.5in SAS Data Centre HDD featuring 4Kn CMR nearline storage with the 0B36016

The 0B36016 is a WD Ultrastar DC HC310 3.5in internal enterprise HDD designed for server and storage-array tiers where predictable throughput, consistent latency, and 24x7 duty cycles are mandatory. As a 7200RPM, single-port SAS drive, the 0B36016 integrates cleanly into SAS backplanes and HBA/RAID controller architectures, enabling controlled queue depth handling and deterministic behaviour under mixed read/write patterns typical of shared RAID pools.

With CMR recording and 4Kn (4KB native) sector formatting, the 0B36016 supports modern alignment practices and reduces write amplification risk compared to legacy emulation modes, helping maintain steady performance in capacity-focused datasets. A 256MB cache supports burst absorption and controller-coordinated caching strategies, while the platform is engineered for dense deployments where power and thermal profiles must be managed across large drive counts. The 0B36016 is positioned for bulk storage, backups, and general-purpose nearline tiers where cost-effective capacity must still meet enterprise reliability targets.

Why Choose the 0B36016?

The 0B36016 provides an operationally efficient path to scale RAID groups and storage pools with a consistent 4TB building block, supporting predictable rebuild planning and balanced density-to-performance ratios. Built for 2.0M hours MTBF and continuous operation, the 0B36016 fits environments that prioritise service continuity, controlled maintenance windows, and straightforward capacity expansion across servers, JBODs, and SAN/NAS back-end tiers.

WD designs Ultrastar platforms around data centre serviceability, stable firmware behaviour, and compatibility with enterprise SAS ecosystems. The 0B36016 also supports TCG Enterprise SSC security for policy-driven data protection in regulated infrastructures and standardised fleet deployments.

Key Applications:

• RAID pools in rack servers
• Storage arrays and JBOD expansion shelves
• Backup and archive repositories
• Nearline bulk storage tiers
• General-purpose file and object storage

At Happyware - Server Hardware you benefit from non-binding offers tailored to your rollout plan for the 0B36016, helping you standardise configurations across projects while keeping procurement efficient. For long-lived storage platforms, you can also extend the warranty up to 6 years to align coverage with your data centre refresh cycle.