- Description
- Specifications
WD Ultrastar DC SN655 7.68TB NVMe U.3 Enterprise SSD with PCIe Gen 4 Interface, BiCS5 TLC 3D NAND, Dual-Port Redundancy, Power Loss Protection, and 6800 MB/s Sequential Read for High-Performance Data Center Storage
The Western Digital Ultrastar DC SN655 WUS5EA176ESP7E1 (0TS2459) is a 7.68TB enterprise NVMe SSD that delivers 6800 MB/s sequential read, 2000 MB/s sequential write, and up to 980,000 random read IOPS through a PCIe Gen 4 interface in the U.3 15mm form factor for read-intensive data center and cloud storage workloads. The SN655 pairs a Western Digital NVMe 1.4b controller with BiCS5 TLC 3D NAND to provide high-capacity, low-latency storage that scales efficiently across rack-dense environments, and dual-port redundancy enables failover capability for high-availability storage architectures without requiring a separate multipath adapter.
The U.3 form factor provides backward compatibility with both U.2 and U.3 backplanes, enabling drop-in deployment into existing NVMe storage infrastructure. Power loss protection safeguards in-flight data during unexpected power events, end-to-end data protection maintains data integrity from host to NAND, and the 1.0 drive write per day endurance rating over the 5-year warranty period supports sustained enterprise read/write workloads. The projected 2.5 million hour MTBF delivers the reliability that always-on data center environments require, and the 7.68TB capacity at the 2.5-inch form factor maximizes storage density per rack unit for organizations scaling capacity in footprint-constrained environments.
Where the WD Ultrastar DC SN655 7.68TB Fits
- Cloud and hyperscale data center environments running read-intensive workloads where the 6800 MB/s sequential read and 980,000 random read IOPS deliver the throughput and latency that content delivery, database caching, and analytics workloads require, the PCIe Gen 4 interface provides the bandwidth for high-IOPS applications, and the 7.68TB capacity maximizes storage per slot to reduce infrastructure footprint
- High-availability NVMe storage arrays and SAN platforms where the dual-port redundancy enables multipath I/O for controller failover without data path interruption, the U.3 form factor provides backward compatibility with U.2 backplanes for flexible deployment, and the power loss protection and end-to-end data protection maintain data integrity in mission-critical environments
- AI, machine learning, and big data platforms processing large unstructured datasets where the 7.68TB capacity stores large training datasets and working sets locally for faster access, the low-latency NVMe performance reduces time-to-insight for data-intensive analytics, and the 1.0 DW/D endurance rating supports the sustained write patterns of iterative ML workflows over the 5-year warranty period
What the WD Ultrastar DC SN655 7.68TB Delivers
- 7.68TB Enterprise NVMe: 7.68TB capacity with PCIe Gen 4 NVMe interface. Western Digital NVMe 1.4b controller. BiCS5 TLC 3D NAND. U.3 15mm form factor with U.2 backward compatibility.
- High-Performance Read-Intensive Storage: 6800 MB/s sequential read. 2000 MB/s sequential write. 980,000 random read IOPS. 80,000 random write IOPS.
- Enterprise Reliability and Protection: Dual-port redundancy for multipath I/O failover. Power loss protection. End-to-end data protection. 2.5 million hour projected MTBF.
- Data Center Endurance: 1.0 drive write per day endurance rating. 5-year limited warranty. Designed for sustained 24/7 cloud and enterprise workloads.
- 2.5-Inch Form Factor: U.3 15mm chassis at 2.8 x 4 x 0.6 inches. 5.20 oz weight. Compatible with PC and Linux platforms. Drop-in for NVMe storage arrays and server platforms.
