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

The Western Digital Ultrastar DC SN655 7.68TB (0TS2461) is a PCIe 4.0 x4 NVMe U.3 enterprise solid-state drive engineered for high-density, capacity-oriented workloads where efficient TB-per-rack-unit economics are a primary consideration. Built on Western Digital's 3D TLC NAND technology and leveraging the U.3 tri-mode interface, the SN655 integrates seamlessly into multi-protocol backplane environments that support SAS, SATA, and NVMe within a single 2.5-inch bay, simplifying infrastructure transitions and maximizing storage density in modern scale-out architectures.

The drive delivers sequential read performance up to 6,600 MB/s and sequential write performance up to 4,000 MB/s, with a strong random 4K read IOPS figure suited to mixed read-intensive enterprise workloads. Power management is a distinguishing characteristic of the SN655, incorporating multiple active power states and support for NVMe Autonomous Power State Transitions (APST), enabling operators to meaningfully reduce per-drive power draw at scale — a critical operational consideration in hyperscale and large enterprise deployments where thousands of drives operate concurrently.

The Ultrastar DC SN655 7.68TB targets read-intensive and mixed-use workloads including object storage platforms, distributed file systems, Hadoop and analytics clusters, content repositories, and cloud-native infrastructure tiers where high sequential and random read throughput at large capacity points reduces the total number of drives required per cluster. Enterprise data integrity features include end-to-end data path protection, power-loss protection circuitry, and support for NVMe 1.4 standard features, making the SN655 a dependable platform for production-grade deployments.

Ideal for

• Scale-out object storage clusters (e.g., Ceph, MinIO) requiring high-capacity NVMe nodes with low per-TB footprint
• Distributed analytics and data lake platforms where large sequential read throughput accelerates query performance across dense storage nodes
• Cloud infrastructure warm storage tiers handling mixed read/write workloads with high aggregate bandwidth demands
• Content delivery and media repositories storing and streaming large unstructured data sets at high concurrency
• Hyperconverged infrastructure (HCI) deployments leveraging U.3 tri-mode backplanes for flexible protocol coexistence
• Enterprise backup-to-disk and restore acceleration targets requiring high sustained sequential throughput and large raw capacity per drive

Technical specifications

Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.