0F30143 WD Ultrastar DC HC520 12TB SATA 256 MB 3.5" Server HDD

Capacity-Optimised 3.5in Enterprise SATA HDD for scale-out storage with the 0F30143

The 0F30143 is a 12TB 3.5in enterprise HDD engineered for server JBOD shelves and RAID arrays where predictable throughput, consistent latency, and high capacity per bay are primary design constraints. Built on a 7200 RPM CMR media platform with a 256MB cache, the 0F30143 supports mixed read/write datacentre profiles while maintaining the deterministic write behaviour required for rebuild operations and sustained ingest.

With a SATA interface aligned to broad server and storage compatibility, the 0F30143 integrates cleanly into scale-out nodes, backup tiers, and general-purpose repositories without introducing protocol complexity. Its 4Kn native sector format is suited to modern filesystems and object stacks designed for 4KB alignment, reducing translation overhead and supporting efficient metadata and sequential IO patterns. Self-encrypting drive (SED) capability enables storage-layer security designs where encryption is managed at the drive boundary.

Why Choose the 0F30143?

The 0F30143 delivers a practical density-to-performance balance for capacity-led architectures, enabling higher usable TB per rack unit while keeping operational characteristics consistent across large drive counts. For enterprise deployment, the 0F30143 is optimised for 24x7 duty cycles, offering a reliability profile specified at 2.5M hours MTBF to support predictable service windows, scalable expansion, and controlled risk in multi-bay environments.

WD designs Ultrastar-class HDDs around long-life mechanics, stable firmware behaviour, and datacentre-focused validation to ensure reliable integration with modern server platforms, storage controllers, and lifecycle management processes. This engineering approach supports standards-driven operations where power efficiency, thermal planning, and fleet consistency are key.

Key Applications:

• Server JBOD shelves
• RAID capacity tiers
• Backup and archive repositories
• Object storage nodes
• Scale-out file storage

At Happyware - Server Hardware you benefit from non-binding offers tailored to your storage node or array design and from extended warranty options up to 6 years to protect long-term capacity deployments of the 0F30143.