Data strategy,
not just data storage.

Introducing the Ultrastar®

2.5-inch U.3, 15mm, NVMe SSD 3.84TB, 7.68TB, 15.36TB1


• Western Digital NVMe 1.4 Compliant
Controller; PCle® 4.0
• Western Digital BiCS5 3D TLC NAND
• U.3 interface (U.2 Backplane Compatible)
• 1.0 DW/D
• Enterprise features including:
– Power Loss Protection
– End-to-End data Path Protection
– Variable Sector Sizes
– NVMe-MI™ 1.1b


• Cloud datacenters
• Scale-out or Software Defined Solutions
• Big Data
• NoSQL or Distributed databases
• AI/ML Deep Learning
• Data Archiving

Unlocking the Full Potential of Enterprise SSDs

Western Digital NVMe™ solid state drives provide the trusted performance reliability, and security demanded by enterprise environments. The Ultrastar DC SN655 NVMe SSD expands the Ultrastar SN65x family with a dual-port drive, expanded encryption capabilities, and added performance.

Ultrastar NVMe SSDs continue to be the ideal solution for cloud and server providers who need performant, high-capacity, cost-optimized, read-intensive performance for their data-intensive applications.

With dual-port redundancy and failover capability, end-to-end data protection and additional enterprise features, the SN655 helps ensure your data is secure and available when needed. With high-capacity, low-latency performance reaching up to 1.1M IOPs, storage providers are efficiently able to increase capacity for modern applications processing large unstructured datasets for analytics, artificial intelligence, or machine learning. With these workloads growing to gigabytes and even petabytes, storage-optimized Ultrastar NVMe SSDS are reducing time-to-insights of big data and enabling efficient machine learning.


The new Ultrastar DC SN655 NVMe SSDs includes the next generation Western Digital NVMe 1.4b controller with PCIe Generation 4.0 interface and Western Digital BiCS5 TLC 3D NAND. NVMe provides hosts low-latency access to direct attached NVMe SSDs or to NVMe-oF™ storage arrays. BiCS5 TLC 3D NAND is the next generation of 3D NAND driving higher bit densities per mm² for higher capacities than prior generations, up to 15.36TB. Equipped with the latest PCIe Generation 4.0, the SN655 enables performance at scale for increasingly larger application workloads. Designed and built for the standard 2.5” SSD storage infrastructure, the SN655 includes support for U.2 and U.3 backplanes. And with enterprise grade power loss protection, 2.5M MTBF (projected) and 1.0 DW/D with a 5 year limited warranty, cloud and IT managers can deploy and scale their datacenters confidently.

Emerging Workloads

Ultrastar DC SN650 and SN655 NVMe SSDs are optimized for cloud and scale-out workloads, providing high capacities, higher QoS consistency, and better utilization for cloud as-a-service offerings, virtualization, and object or file storage. Emerging workloads for big data, artificial intelligence, and machine learning are increasing in size and complexity and are typically stored across distributed, tiered, or disaggregated architectures. The SN65x NVMe SSDs are optimized for moving these large data sets fast and servicing multiple hosts with performance consistency making them the ideal solution for scaling capacity and maximizing GB/watt.

Please check availability of Ultrastar SN655 NVMe™ SSD drives: