Data Center Solutions Ultrastar NVMe™ Series
from Western Digital

Name: Ultrastar NVMe™ Series
SKU: dc-sn840

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

Ultrastar NVMe series SSDs perform at the speed of today’s business needs. Enabling faster intelligence & access to critical data, these SSDs meet the growing digital demands of your business 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.

Mainstream NVMe Ultrastar DC SN640 SSDs are optimized for consistent quality of service and low latency for mixed random read/write workloads commonly generated by top enterprise applications such as virtualization, OLTP, NoSQL, web servers, file servers and mail servers. Ultrastar DC SN640 enables a seamless transition from SATA SSDs, delivering high performance for deeper insights & faster results for today’s data intensive applications.

Product Details

Highlights

Performance and Mainstream NVMe SSDs
Capacities up to 15.36TB¹ 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 for Ultrastar DC SN840, DC SN200
Ideal for common enterprise mixed-use workloads
Enterprise-class reliability rating, 2.5M hour MTBF⁵

Applications and Workloads

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

Full Specifications

Interface

PCIe 3.1 (1x4 or 2x2) NVMe™ 1.3c, Western Digital dual-port high availability

Form Factor

U.2, 15mm, 2.5” drive

Capacity

3 DW/D: 6.4TB / 3.2TB / 1.6TB
1 DW/D: 15.36TB / 7.68TB / 3.84TB / 1.92TB

Endurance (Drive writes per day, DW/D)

Maximum Terabytes Written (TBW)

3 DW/D: 35,040 / 17,520 / 8,760
1 DW/D: 28,032 / 14,016 / 7,008 / 3,504

Sequential Read (max (MB/s, 64KiB))

3,470

Sequential Write (max (MB/s, 64KiB))

3,300

Sequential Read (max (MB/s, 128KiB))

Sequential Write (max (MB/s, 128KiB))

Sequential Read (max MiB/s, 128KiB)

Sequential Write (max MiB/s, 128KiB)

Sequential Read, (max MiB/s, 128KiB BS, QD128)

Sequential Write, (max MiB/s, 128KiB BS, QD128)

Random Read (max IOPS, 4KiB)

780,000

Random Write (max IOPS, 4KiB)

257,000

Random Read (max IOPS, 4KiB BS, QD128)

Random Write (max IOPS, 4KiB BS, QD128)

Mixed Random Read/Write (max IOPS 70%R/30%W, 4KiB)

503,000

Random Read Latency (4KiB BS, QD1, 99.99%) (μs)

Average Read Latency (μs, min)

75⁴

Operating (W, max average)

Interface

PCIe 3.0 x4 or 2x2 NVMe 1.2

Form Factor

U.2, 15mm, 2.5" drive

Capacity

3 DW/D: 6.4TB / 3.2TB / 1.6TB / 800GB
1 DW/D: 7.68TB / 3.84TB / 1.92TB / 960GB

Endurance (Drive writes per day, DW/D)

Maximum Terabytes Written (TBW)

3 DW/D: 35,040 / 17,520 / 8,760 / 4,380
1 DW/D: 14,016 / 7,008 / 3,504 / 1,752

Sequential Read (max (MB/s, 64KiB))

Sequential Write (max (MB/s, 64KiB))

Sequential Read (max (MB/s, 128KiB))

Sequential Write (max (MB/s, 128KiB))

Sequential Read (max MiB/s, 128KiB)

3,350

Sequential Write (max MiB/s, 128KiB)

2,100

Sequential Read, (max MiB/s, 128KiB BS, QD128)

Sequential Write, (max MiB/s, 128KiB BS, QD128)

Random Read (max IOPS, 4KiB)

835,000

Random Write (max IOPS, 4KiB)

3 DW/D: 200,000
1 DW/D: 75,000

Random Read (max IOPS, 4KiB BS, QD128)

Random Write (max IOPS, 4KiB BS, QD128)

Mixed Random Read/Write (max IOPS 70%R/30%W, 4KiB)

3 DW/D: 580,000
1 DW/D: 240,000

Random Read Latency (4KiB BS, QD1, 99.99%) (μs)

Average Read Latency (μs, min)

Operating (W, max average)

Interface

PCIe 3.0 x8 NVMe 1.2

Form Factor

HH-HL add-in card

Capacity

3 DW/D: 6.4TB / 3.2TB / 1.6TB
1 DW/D: 7.68TB / 3.84TB / 1.92TB

Endurance (Drive writes per day, DW/D)

Maximum Terabytes Written (TBW)

3 DW/D: 35,040 / 17,520 / 8,760
1 DW/D: 14,016 / 7,008 / 3,504

Sequential Read (max (MB/s, 64KiB))

Sequential Write (max (MB/s, 64KiB))

Sequential Read (max (MB/s, 128KiB))

Sequential Write (max (MB/s, 128KiB))

Sequential Read (max MiB/s, 128KiB)

6,170

Sequential Write (max MiB/s, 128KiB)

2,200

Sequential Read, (max MiB/s, 128KiB BS, QD128)

Sequential Write, (max MiB/s, 128KiB BS, QD128)

Random Read (max IOPS, 4KiB)

1,200,000

Random Write (max IOPS, 4KiB)

3 DW/D: 200,000
1 DW/D: 75,000

Random Read (max IOPS, 4KiB BS, QD128)

Random Write (max IOPS, 4KiB BS, QD128)

Mixed Random Read/Write (max IOPS 70%R/30%W, 4KiB)

3 DW/D: 580,000
1 DW/D: 240,000

Random Read Latency (4KiB BS, QD1, 99.99%) (μs)

Average Read Latency (μs, min)

Operating (W, max average)

Warranty

Resources

Disclosures

As used for storage capacity, 1GB = 1 billion bytes and 1TB = 1 trillion bytes. Actual user capacity may be less depending on operating environment.
Endurance rating based on DW/D using 4KiB random write workload over 5 years.
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 2^20, 1KiB= 1,024 bytes or 2^10.
Average Write Latency at 4KiB QD=1.
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.
The warranty for the product will expire on the earlier of (i) the date 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.

Data Center Solutions Ultrastar NVMe™ Series
from Western Digital

Data Center Solutions Ultrastar NVMe™ Series
from Western Digital

Data Center Solutions Ultrastar NVMe™ Series
from Western Digital

Data Center Solutions Ultrastar NVMe™ Series
from Western Digital

Data Center Solutions Ultrastar NVMe™ Series
from Western Digital

Data Center Solutions Ultrastar NVMe™ Series
from Western Digital

Data Center Solutions Ultrastar NVMe™ Series
from Western Digital

Data Center Solutions Ultrastar NVMe™ Series
from Western Digital

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

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

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

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

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

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

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

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

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Details & Exclusions

Data Center Solutions Ultrastar NVMe™ Series from Western Digital

Data Center Solutions Ultrastar NVMe™ Series from Western Digital

Data Center Solutions Ultrastar NVMe™ Series from Western Digital

Data Center Solutions Ultrastar NVMe™ Series from Western Digital

Data Center Solutions Ultrastar NVMe™ Series from Western Digital

Data Center Solutions Ultrastar NVMe™ Series from Western Digital

Data Center Solutions Ultrastar NVMe™ Series from Western Digital

Data Center Solutions Ultrastar NVMe™ Series from Western Digital

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

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

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

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

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

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

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

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

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