WD Ultrastar DC SN655 15.36TB U.3 PCIe 4.0 NVMe SSD

The QNAP WD Ultrastar DC SN655 is an enterprise-grade solid-state drive built specifically for demanding data center and cloud environments. Utilizing the U.3 form factor and a PCIe Gen 4 x4 interface, this device provides 15.36 terabytes of storage capacity for large-scale operations. The drive is optimized to maintain consistent throughput and low latency when handling sustained, intensive workloads typical of big data analytics, high-frequency access, and AI/ML processing.

Performance specifications include sequential reading speeds of 6800 MB/s and sequential writing speeds reaching 3700 MB/s. The internal architecture utilizes BiCS5 TLC 3D NAND and adheres to the NVMe 1.4b standard, ensuring robust efficiency under concurrent I/O operations. Reliability features, such as enhanced power loss protection and end-to-end data path protection, maintain data integrity across the system lifecycle.

The hardware is rated for a high Mean Time Between Failures (MTBF) of 2.5 million hours and a 1.0 Drive Writes Per Day (DWPD) endurance rating. Security protocols include comprehensive hardware encryption supporting TCG Ruby, suitable for regulated storage environments. The design facilitates seamless integration into existing server infrastructure requiring high-density, high-performance storage solutions.

• Storage capacity: 15.36 terabytes
• Form factor: U.3 (15 mm height)
• Interface: PCIe Gen 4 x4 connection
• Random Read Performance: 1,100,000 IOPS
• Sequential data transfer rate: 32 Gbit/s
• Target workload: Optimized for scale-out data center environments
• Controller Type: SanDisk NVMe 1.4b controller
• Operating power consumption average: 20 W
• Write latency specified at 15 µs
• Hardware encryption via ISE and TCG Ruby algorithms