Ultrastar DC SN840
2.5-inch Performance NVMe Solid State Drive (SSD)

Overview

Performance NVMe SSDs Enable Enterprise Workloads

NVMe adoption in the data center continues to grow as modern applications and workloads demand more performance. Performance NVMe SSDs are designed for primary storage for HPC servers and primary storage in external storage arrays. Performance NVMe SSDs target cloud compute and enterprise workloads that require low latency to data and high availability of data. These applications include real-time data analytics, cloud computing, OLTP/OLAP databases, artificial intelligence (AI), machine learning (ML), pattern recognition and virtualization. The Ultrastar DC SN840 is Western Digital's 3rd generation of performance NVMe SSD for data center with PCIe Gen 3.1 (dual-port) NVMe 1.3, providing up to 3,470/3,330 MB/s Sequential Read/Write and up to 503K IOPS mixed random 70/30 read/write performance.

Applications

• High peformance computer (HPC)
• High availability storage arrays
• All mixed use workloads
• Artifical Intelligence/Machine Learing
• Online transaction processing (OLTP) and online analytical processing (OLAP)
• Real-time analytics
• Pattern recognition
• Virtualization

Dual-port Leadership

Ultrastar DC SN840 extends Western Digital’s leadership in dual-port architecture by vertically integrating proven flash controllers. Dual-port high availability supports two redundant paths to the SSD, and is critical to ensuring access to data in the event of a failure in the data path.

Trusted Reliability and Quality for Data at Scale

Ultrastar DC SN840 is bult on Western Digital's 96-layer 3D TLC NAND, with capacities up to 15.36TB in a U.2 2.5" form factor. It offers two endurance classed for workloads; 1 DW/D for read intensive workloads common with the majority of enterprise applications and cloud services, and 3 DW/D for higher write or mixed use workloads such as running SQL. The DC SN840 has a five-year limited warranty with enterprise reliability MTBF of 2.5M hours (projected). The DC 840 offers security options with Secure Erase (SE), Instant Secure Erase (ISE) with an AES-256 encryption engine, TCG Ruby and FIPS 140-2 validation (forthcoming).

Specifications

¹ One MB is equal to one million bytes, one GB is equal to one billion bytes and one TB equals 1,000GB (one trillion bytes). Actual user capacity may be less due to operating environment.
² Endurance rating based on DW/D using 4KiB 100% random write and JESD 219 workloads over 5 years.
³ Based on internal testing. Performance will vary by capacity point, or with the changes in useable capacity. Consult product manual for further details. All performance measurements are in full sustained mode and are peak values. Subject to change.
⁴ Average random read latency at 4KiB, QD=1
⁵ MTBF and AFR specifications will be based on a sample population and are estimated by statistical measurements and acceleration algorithms under typical operating conditions for this drive model. MTBF and AFR ratings do not predict an individual drive's reliability and do not constitute a warranty.
⁶ The warranty for the product will expire on the earlier of (i) the data when the flash media has reached one-percent (1%) of its remaining life or (ii) the expiration of the time period associated with the product.
⁷ Values are based on amibient temperature. Avoid non-operational exposure to temperatures in excess of 40°C for periods exceeding three months.
⁸ Compared to pervious generation in same form factor, 1DW/D.

Documentation

Download the Western Digital Ultrastar DC SN840 Datasheet (.PDF)