Ultrastar® DC HC590

The Future of More. Plus One.
The world’s first 11-disk HDD platform delivers unbeaten capacity of up to 26TB (CMR) to help quench customer’s insatiable demand for increased storage density in the existing storage footprint.
Rapid Qualification and Rock Solid Reliability
Leveraging field-proven hardware and firmware designs from generations of highly successful products ensures easy qualification, seamless integration and rapid adoption while maintaining superior dependability and reliability.
Maximum Rack-Space Efficiency
The higher storage density provided by 11 disks combined with our exclusive energy-assisted Perpendicular Magnetic Recording (ePMR) technology, which increase tracks-per-inch (TPI), allows data centers to maximize their storage efficiency.
Protected Against Vibration and Shock
Our exclusive Rotational Vibration Safeguard (RVS) uses dual sensors to anticipate and counteract disturbances, maintaining peak performance in high-vibration environments. Combined with Dynamic Fly Height technology, Western Digital offers exceptional drive reliability and protection from unexpected shock events.
Engineered with Industry-Leading Technology
Western Digital’s proprietary OptiNAND™ technology leverages integrated iNAND® embedded flash to perform key housekeeping functions, freeing up more capacity and improving the overall drive performance.
Powerful Performance and Resiliency
Choose ArmorCache™ write cache disabled (WCD) mode for increased random write performance or select write cache enable (WCE) mode to protect cached data in case of Emergency Power Off (EPO) or unexpected power loss scenarios.
Ultrastar® DC HC555

Handle Data Center Workloads with Proven Technology
The combination of field-proven hardware with the latest innovative technologies delivers the performance, capacity and reliability needed to handle high-intensity workloads in 24×7 multi-user data center environments.
Grow Capacity while Lowering Costs
Western Digital’s energy-assisted perpendicular magnetic recording (ePMR) technology enables customers to grow capacities while lowering TCO (total cost of ownership) including both $/TB and OpEx.
Rapid Qualification and Integration
Combining hardware designs from generations of highly successful products with Conventional Magnetic Recording (CMR) technology ensures easy qualification, seamless integration and rapid adoption by existing customers.
Increase Density with Low Power
Western Digital’s Triple-Stage Micro Actuator increases tracks-per-inch (TPI) while providing greater control over the actuator arm, enabling the highest capacities with low power.
Protected Against Vibration & Shock
Our exclusive Rotational Vibration Safeguard (RVS) uses dual sensors to anticipate and counteract disturbances, maintaining peak performance in high-vibration environments. Combined with Dynamic Fly Height technology, Western Digital offers exceptional drive reliability and protection from unexpected shock events.