0B36405 WD Ultrastar DC HC320 8TB SAS 256 MB 3.5" Server HDD

Datacenter-Class 3.5" Enterprise SAS HDD engineered for 24x7 nearline storage with the 0B36405

The 0B36405 is a WD Ultrastar DC HC320 8TB internal 3.5" enterprise HDD designed for servers, SAS disk shelves, and JBODs that depend on 12Gb/s SAS connectivity and consistent latency under continuous duty. In storage architectures where CPU and GPU resources are constrained by data access patterns, the 0B36405 provides predictable bulk throughput for capacity tiers, backups, and nearline primary storage.

Built on CMR media with 4Kn native sectors, the 0B36405 aligns with modern filesystems and object storage stacks that benefit from 4KB sector efficiency and reduced write amplification. Its 7200 RPM design and 256MB cache support queue-depth heavy workloads typical of shared SAS backplanes, while the 12Gb/s SAS interface enables scalable fan-out across expanders. For growth-oriented deployments, the 0B36405 fits cleanly into mixed tiers alongside SSD pools by offloading large, sequential datasets and retaining serviceability in standard 3.5" bays.

Why Choose the 0B36405?

The 0B36405 delivers an enterprise density-to-performance balance optimized for predictable, high-availability capacity layers. With 24x7 duty rating and 2.0M hours MTBF, the 0B36405 supports standardized fleet operations, controlled failure domains, and phased scaling in SAS-based enclosures where uniform drive behavior is critical for rebuild planning and RAID or erasure coding policies.

WD Ultrastar engineering emphasizes datacenter reliability, validated firmware behavior, and integration alignment with enterprise SAS infrastructures. The platform is designed to operate within modern power and thermal envelopes while supporting long service lifecycles in standardized rack deployments.

Key Applications:

• SAS JBOD and disk shelf expansion
• Backup and archival repositories
• Nearline primary storage tiers
• Bulk data and log retention
• Virtualization secondary datastores

At Happyware - Server Hardware you benefit from non-binding offers tailored to your storage shelf or server configuration and from an extended warranty up to 6 years to protect long-term datacenter rollouts of the 0B36405.