Western Digital DC SN861 3840GB 2.5" U.2 PCIe 5.0 x4 NVMe SSD

The Western Digital DC SN861 is a 3.84 TB enterprise-grade solid-state drive engineered for high-density data center environments and intensive computing workloads. It utilizes the U.2 PCIe 5.0 x4 interface and complies with the NVMe 2.0 specification to facilitate higher data throughput and lower latency compared to legacy standards. This 2.5-inch form factor drive is built with TLC NAND flash technology and is intended for enterprise servers requiring rapid data access. The physical dimensions include a 15mm height and a 69.85mm width, allowing it to fit standard enterprise-grade drive bays.

Performance specifications include sequential read speeds of up to 13,700 MB/s and sequential write speeds of up to 7,200 MB/s. The unit features hardware-based TCG Opal Encryption and end-to-end data path protection to ensure data security and integrity across the entire storage architecture. Integrated power loss protection technology is included to prevent data corruption during sudden power failures. With a mean time between failures of 2.5 million hours and a 1 drive write per day endurance rating, the drive is designed for constant operational availability.

• Storage capacity: 3.84 TB
• Form factor: 2.5-inch U.2 with 15mm height
• Interface: PCIe 5.0 x4 utilizing NVMe v2.0 protocol
• Sequential read speed: up to 13,700 MB/s
• Sequential write speed: up to 7,200 MB/s
• Random read performance: up to 3,300,000 IOPS
• Random write performance: up to 330,000 IOPS
• Read latency: 65 microseconds
• Write latency: 8 microseconds
• NAND flash type: Triple-Level Cell (TLC)
• Security algorithms: TCG Opal Encryption for hardware-based protection
• Reliability: 2.5 million hours mean time between failures
• Endurance rating: 1 drive write per day
• Data protection: Power loss protection and end-to-end path protection
• Power consumption: 5W idle and up to 20W maximum