0B35915 WD Ultrastar DC HC310 4TB SAS 256 MB 3.5" Server HDD

Enterprise 3.5in SAS Capacity HDD for RAID and bulk storage tiers with the 0B35915

The 0B35915 is a 3.5in internal enterprise HDD engineered for server capacity tiers and SAS backplane environments where predictable latency and sustained throughput matter more than flash-level IOPS. Deployed behind modern CPU platforms and RAID/HBA controllers, the drive’s SAS connectivity supports deterministic command handling and scalable drive counts in dense storage shelves.

Built on CMR recording with a 7200 RPM spindle and 256MB cache, the 0B35915 maintains consistent write behaviour under rebuilds and mixed read/write patterns typical of RAID arrays. Support for 512e and 4Kn sector formats simplifies alignment with contemporary filesystems and storage stacks, while encryption capability helps meet data-at-rest controls without altering host architecture. In PCIe-based servers, the 0B35915 integrates cleanly via SAS HBAs or RAID adapters, enabling straightforward expansion and serviceability within standard hot-swap bays.

Why Choose the 0B35915?

The 0B35915 delivers a balanced density-to-performance profile for enterprises standardising on SAS for shared backplanes, predictable failover procedures, and controlled fleet management. With an MTBF rating of 2.0M hours and 24/7 datacenter intent, the 0B35915 supports scale-out capacity growth, consistent rebuild behaviour, and operational reliability across multi-drive arrays.

WD designs Ultrastar enterprise drives with a focus on sustained duty cycles, compatibility across mainstream SAS storage ecosystems, and lifecycle consistency for large deployments. The 0B35915 aligns with data centre requirements for dependable operation, security features such as encryption support, and integration into established monitoring and maintenance workflows.

Key Applications:

• Server bulk storage and capacity tiers
• RAID arrays in SAS backplane systems
• 24/7 datacenter and enterprise storage
• Backup and archival repositories
• Log retention and compliance storage

At Happyware - Server Hardware you benefit from non-binding offers tailored precisely to your storage architecture and rollout schedule, ensuring the 0B35915 fits your controller, backplane, and sector-format requirements. For long-term platform planning, you can also extend the warranty up to 6 years to strengthen operational risk management for high-volume deployments of the 0B35915.