0F29560 WD Ultrastar DC HC520 12TB SAS 256 MB 3.5" Server HDD

High-Density 3.5in SAS Enterprise HDD for 24x7 Datacenter Duty with the 0F29560

The 0F29560 is a WD Ultrastar DC HC520 12TB internal enterprise HDD designed for capacity-driven tiers in servers and storage arrays where predictable throughput, sustained duty cycles, and RAID behavior matter. Built on helium-filled 3.5in CMR recording, the drive targets bulk storage pools that prioritize consistent write characteristics over aggressive caching schemes, making it well-suited to backup, archive, and general datacenter HDD layers.

With a single-port SAS interface and native 4Kn sector format, 0F29560 aligns to modern controller stacks that support end-to-end 4Kn, reducing legacy translation overhead and improving format consistency across large RAID sets. A 7200RPM spindle and 256MB cache support steady sequential performance for rebuilds and large-block workloads, while enterprise reliability characteristics such as 2.5M hours MTBF and Instant Secure Erase (ISE) support operational continuity and secure lifecycle handling in multi-tenant or compliance-sensitive environments.

Why Choose the 0F29560?

Choosing 0F29560 provides a practical density-to-bay ratio for scaling capacity without increasing enclosure footprint, while maintaining deterministic CMR behavior for RAID pools and long retention datasets. The 0F29560 fits deployments where predictable rebuild performance, datacenter-grade duty cycles, and validated SAS integration reduce risk when expanding shelves, refreshing capacity tiers, or standardizing drives across mixed server and storage platforms.

WD enterprise engineering focuses on consistent firmware behavior, endurance under continuous operation, and compatibility with modern datacenter standards for serviceability and secure decommissioning. As part of the Ultrastar line, 0F29560 is optimized for controlled thermals and power efficiency in dense racks while supporting rigorous qualification processes common in enterprise storage architectures.

Key Applications:

• Backup repositories
• Archive and cold data tiers
• Capacity-focused SAN/NAS pools
• General-purpose datacenter HDD tiers
• RAID arrays with end-to-end 4Kn support

At Happyware - Server Hardware you benefit from non-binding offers tailored to your storage architecture and rollout plan, helping you standardize 0F29560 across shelves and RAID groups with predictable lead times. For larger refresh projects, bulk order discount options support cost-efficient scaling of enterprise capacity tiers.