WD Ultrastar DC SN655 7.68TB U.3 NVMe Enterprise SSD

WD Ultrastar DC SN655 7.68TB U.3 NVMe Enterprise SSD

The WD Ultrastar DC SN655 7.68TB NVMe SSD delivers up to 6800 MB/s sequential read performance over a PCIe Gen4 interface in a U.3 15mm form factor. Built with SanDisk BiCS5 TLC 3D NAND and an NVMe 1.4b controller, it is engineered for read-intensive cloud and enterprise server workloads requiring high capacity and consistent throughput.

Ideal for data centers, cloud service providers, AI and machine learning infrastructure, and big data analytics platforms, the SN655 supports both U.2 and U.3 backplanes with dual-port redundancy and failover capability. Its high-density 7.68TB capacity reduces rack footprint while sustaining demanding I/O workloads across hyperscale and enterprise environments.

Western Digital backs the Ultrastar DC SN655 with a 5-year limited warranty and a 1.0 DWPD endurance rating, alongside a projected MTBF of 2.5 million hours. Enterprise-grade features include end-to-end data path protection, power loss protection, and variable sector size support, making this drive a reliable foundation for mission-critical storage deployments.

Key Features of the WD Ultrastar DC SN655 7.68TB

• High Sequential Read Performance: Up to 6800 MB/s sequential read throughput over PCIe Gen4 for fast data access in read-intensive workloads.
• BiCS5 TLC 3D NAND: SanDisk-developed 3D NAND technology provides high density, strong endurance, and improved power efficiency.
• Dual-Port U.3 Form Factor: Supports U.2 and U.3 backplanes with dual-port redundancy and failover for high-availability deployments.
• Enterprise Endurance: 1.0 DWPD endurance rating with a 5-year limited warranty ensures long-term reliability in sustained write environments.
• End-to-End Data Protection: Comprehensive data integrity protection across the full data path from host to NAND.
• Power Loss Protection: Hardware-based power loss protection prevents data corruption during unexpected power events.
• High IOPS Performance: Up to 1.1 million random IOPS for demanding enterprise I/O workloads.
• Multiple Security Options: Available in SE (Standard Edition), ISE (Inline Secure Erase), and TCG Ruby configurations for flexible data security compliance.

Technical Specifications

• Capacity: 7.68 TB
• Form Factor: 2.5 inch U.3 15mm
• Interface: PCI Express NVMe 4.0 (NVMe 1.4b)
• Sequential Read: Up to 6800 MB/s
• Sequential Write: Up to 2000 MB/s
• Random Read IOPS: Up to 980,000 IOPS (4KB)
• Random Write IOPS: Up to 80,000 IOPS (4KB)
• NAND Type: SanDisk BiCS5 TLC 3D NAND
• Endurance: 1.0 DWPD (Drive Writes Per Day)
• MTBF: 2.5 million hours (projected)
• Backplane Compatibility: U.2 and U.3
• Security: SE / ISE / TCG Ruby options
• Warranty: 5 Year Limited
• Country of Origin: Malaysia