0F29563 WD Ultrastar DC HC520 12TB SAS 256 MB 3.5" Server HDD

High-Density 3.5-inch Enterprise SAS Nearline HDD featuring 4Kn CMR Architecture with the 0F29563

The 0F29563 is a 12TB WD Ultrastar DC HC520 internal datacenter HDD engineered for predictable, always-on nearline tiers where capacity efficiency and fleet consistency matter more than burst IOPS. Built around a 7200 RPM helium-filled platform, the drive balances sustained throughput with controlled vibration behavior for multi-bay enclosures, enabling stable performance in scale-out NAS and object storage nodes.

With a SAS interface optimized for dual-port enterprise backplanes, the 0F29563 integrates cleanly into JBOD/JBOF shelves and RAID arrays while maintaining deterministic error handling expected by storage controllers. The 4Kn (4KB native) sector format supports modern filesystem alignment and reduces translation overhead versus legacy emulation, while CMR recording preserves write consistency under heavy rebuild or ingest cycles. A 256MB cache assists command queue efficiency and streaming workloads, aligning the 0F29563 to backup repositories and high-capacity server storage pools where predictable latency and integrity are primary design goals.

Why Choose the 0F29563?

The 0F29563 delivers a strong density-to-bay ratio for enterprise racks without compromising operational resilience, making it suitable for standardized rollouts across large enclosures. Its 24x7 duty design and 2.5M-hour MTBF profile support scale-driven architectures that prioritize service continuity, consistent rebuild behavior, and streamlined sparing across homogeneous fleets.

WD designs Ultrastar datacenter drives with an engineering focus on sustained workloads, controlled thermals, and long service lifecycles aligned to modern storage shelves and server platforms. Security capabilities such as TCG Enterprise SSC with FIPS 140-2 Level 2 support help organizations integrate the 0F29563 into governed environments with defined data handling requirements.

Key Applications:

• Scale-out NAS capacity tiers
• Object storage nodes
• Backup and archive repositories
• SAS JBOD/JBOF expansion shelves
• Enterprise RAID nearline arrays

At Happyware - Server Hardware you benefit from non-binding offers tailored precisely to your storage expansion plans and the option to extend the warranty up to 6 years for additional security when deploying the 0F29563 across long-lived datacenter platforms.