Western Digital | ASA Computers

Performance NVMe Ultrastar DC SN840 SSD

Accelerate Access to Critical Data for Data-Intensive Workloads & Applications

Performance NVMe Ultrastar DC SN840 SSDs deliver extreme performance & ultra-low latency to the top tier of enterprise storage. With proven dual-port NVMe architecture, these drives are best suited for performance demanding platforms including HPC servers, mission-critical applications and workloads that require superior read/write performance and low latency.

Accelerate Access to Critical Data

Maximum Throughput

Up to 780k random read IOPS

Ultra-Low Latency

Predictable throughput for high-transaction workloads

Flexibility

Suited for performance demanding platforms including HPC servers, mission-critical applications and workloads that require superior read/write performance and low latency

Highlights

Performance NVMe SSDs
Capacities up to 15.36TB in U.2 2.5" form factor
High-performance PCIe Gen 3
96-Layer 3D NAND for Ultrastar DC SN840, DC SN640 and DC SN340
Up to 780k random read IOPS3
Dual-port high availability
Ideal for common enterprise mixed-use workloads
Enterprise-class reliability rating, 2.5M hour MTBF

Applications and Workload

Cloud and Hyperscale computing
Online transaction processing (OLTP)
Online analytical processing (OLAP)
Virtualization
Storage Arrays
Storage Servers
SQL Servers
Pattern Recognition
Artificial Intelligence
Machine Learning

Outstanding Performance

Up to RR=780K IOPS, RW = 257K IOPS, Mixed Randon 70/30 Read/Write = 503K IOPS

High Capacity

Available up to 15.36TB per drive

Quality of Service

Delivers its performance with a high quality of service, minimizing outliers and making it easier to meet demanding SLAs

1,920GB

3,840GB

7,680GB

15,360GB

Model Information

Endurance

1DW/D

Max Petabyte Written

3.504

7.008

14.016

28.032

Configuration

Interface

Western Digital NVMe 1.3c Controller, Dual Port PVIe 3.1 1x4 or 2x2

Form Factor

U.2 2.5-inch, 15mm

Flash Memory Technology

Western Digital 96-Layer 3D TLC NAND

Performance

Read Throughput (max MB/s, Seq 64Kib)

3470

Write Throughput (max MB/s, Seq 64Kib)

2280

32550

3200

3190

Read IOPS(max, Rnd 4Kib)

736K

780K

Write IOPS(max, Rnd 4Kib)

108K

159K

160K

149K

Mixed IOPS (max, 70/30 R/W, 4KiB)

231K

389K

373K

401K

Read Latency

Disclosure

1. One gigabyte (GB) is equal to 1,000MB (one billion bytes) and one terabyte (TB) is equal to 1,000GB (one trillion bytes) when referring to solid-state capacity. Accessible capacity will vary from the stated capacity due to formatting and partitioning of the drive, the computer's operating system, and other factors.
2. Endurance rating based on JESD-219 Workloads over 5 years.
3. 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. Preliminary and subject to change. 1MiB=1,048,576 bytes or 2²⁰, 1KiB= 1,024 bytes or 2¹⁰.
4. MTBF and AFR targets are based on a sample population and are estimated by statistical measurement and acceleration algorithms under median operating conditions. MTBF and AFR rating do not predict an individual drive's reliability and do not constitute a warranty.
5. The lesser of 5 years from the date of manufacture of the product or the date on which the product's relevant endurance thresholds set forth in the product specifications are reached
6. Internal temperature sensor reading.

Ultrastar DC SN840