Western Digital UltraStar DC SN655 7.68TB PCIe Gen4 NVMe 1.4 SE U.3 Internal SSD

Overview

The Western Digital 0TS2459 is a 7.68TB UltraStar DC SN655 internal solid state drive designed for enterprise environments requiring high-speed storage and reliable data access. It uses a PCIe Gen4 interface with NVMe 1.4 protocol to deliver up to 6,800 MB/s sequential read speeds and supports a U.3 form factor for easy integration into modern server and storage systems. This drive is tailored for read-intensive workloads such as transaction-heavy databases, virtual machines, and real-time analytics where consistent performance and low latency are critical.

Key features

• High-capacity 7.68TB storage that accommodates large datasets and extensive log files.
• PCIe Gen4 interface with NVMe 1.4b support for fast data transfer and reduced bottlenecks.
• Dual-port design providing two independent PCIe paths to ensure continuous operation even if one path fails.
• End-to-end data path protection that verifies data integrity from host to NAND memory.
• Built-in power loss protection safeguards data in transit during unexpected shutdowns.
• Optimized for read-intensive enterprise workloads with steady throughput and low latency.
• Compatibility with Windows, Windows Server, and Linux operating systems without requiring additional drivers.
• Designed for deployment in dense server racks and all-flash arrays with a projected 2.5 million hour mean time between failures.

Key specs

• Capacity: 7.68TB
• Interface: PCIe Gen4 NVMe 1.4
• Form factor: U.3
• Sequential read speed: up to 6,800 MB/s
• Sequential write speed: up to 2,000 MB/s
• Random read IOPS: up to 980,000
• Random write IOPS: up to 80,000
• Endurance: 1.0 drive write per day
• Mean time between failures (MTBF): 2.5 million hours

Connectivity and compatibility

This SSD fits into any server or storage shelf equipped with a U.3 interface, making it straightforward to deploy in existing infrastructure. It supports dual-port PCIe connections, which enhance reliability by providing redundant data paths. The drive is recognized natively by current versions of Windows, Windows Server, and Linux, eliminating the need for extra drivers and simplifying integration into diverse IT environments.

Performance and reliability

With a proprietary controller and Western Digital BiCS5 3D TLC NAND, the drive delivers high sequential and random read speeds that help eliminate storage bottlenecks in demanding applications. Its endurance rating supports frequent read operations and occasional batch writes, while power loss protection and end-to-end data path checks ensure data integrity. The dual-port design further enhances uptime by maintaining access through an alternate PCIe path if the primary one fails.

Ideal uses and environments

This SSD is well suited to data centers and enterprise setups that require fast, reliable storage for big data analytics, AI and machine learning workloads, content delivery networks, and hyperconverged infrastructure. It fits well in environments where steady throughput and consistent quality of service are essential, such as transaction-heavy databases and virtual machine hosting. Its robust design and high endurance make it a strong choice for continuous operation in dense server racks.