Western Digital WUS4BA1A1DSP3X3 User Manual

DATA SH E E T

2.5-inch U.2, 15mm, NVMe SSD

1.6TB, 3.2TB, 6.4TB,

1.92TB, 3.84TB, 7.68TB, 15.36TB

Features

• Western Digital dual-port NVMe 1.3c compliant controller; PCIe 3.1

• Western Digital 96-Layer 3D TLC NAND

• 1 and 3 DW/D

• Performance: up to RR = 780K IOPS, RW = 257K IOPS, Mixed Random 70/30 Read/Write = 503K IOPS

• MTBF rating of 2.5 million hours (projected)

• Security Options: Secure Erase (SE) and Instant Secure Erase (ISE), TCG Ruby, FIPS 140–2 validation (forthcoming)

• 5-year limited warranty

• Enterprise features including – 128 namespaces, atomic writes, multiple sector sizes, protection information, SGL, NVMe-MI version 1.1

Applications & Workloads

• High performance computing (HPC)

• High availability storage arrays

• All mixed use workloads

• Artiﬁcial Intelligence/Machine Learning

• Online transaction processing (OLTP) and online analytical processing (OLAP)

• Real-time analytics

• Pattern recognition

• Virtualization

Ultrastar

DC SN840

Performance NVMe™ SSDs Enable Enterprise Workloads

NVMeTM 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 3,311/3,184 MiB/s Sequential Read/Write and up to 503K IOPS

mixed random 70/30 read/write performance.

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.

Quality, Reliability and Security

Ultrastar DC SN840 is built 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

classes for workloads; 1 DW/D for read intensive workloads common with the

majority of enterprise applications and cloud services, and 3 DWPD 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 SN840 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).

up to 45%

MORE SEQUENTIAL WRITE

PERFORMANCE

up to 67%

MORE MIXED IOPS

(max, 70/30, 4KiB)

Ultrastar® DC SN840

DATA SHEET

Speciﬁcations

Model Information

Endurance 1 D W/ D 1 D W/ D 1 D W/ D 1 D W/ D 3 DW/ D 3 D W/ D 3 D W/D

Capacity 1,92 0G B 3,840GB 7,6 80 G B 15,360GB 1,600GB 3,200GB 6,400GB

Maximum Petabytes Written 3.504 7.0 08 14.016 28.032 8 .76 17. 52 35.04

Conﬁguration

Interface Western Digital NVMe 1.3c Controller, Dual Por t PCIe 3.1 1×4 or 2×2

Form Factor U.2 2.5-inch, 15mm

Flash Memory Technology Western Digital 96-Layer 3D TLC NAND

Performance

Read Throughput (max MiB/s, Seq 128KiB)

Write Throughput (max MiB/s, Seq 64KiB)

Read IOPS (max, Rnd 4KiB) 736K 780K 780K 780K 736K 780K 780K

Write IOPS (max, Rnd 4KiB)

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

Read Latency (s)

Reliability

Uncorrectable Bit Error Rate (UBER) 1 in 10

MTBF5 (M hours, projected) 2.5M hours

Annualized Failure Rate5 (AFR, projected) 0.35%

Availability (hrs/day x days/wk)

Limited Warranty6 (years)

Data Retention

Power

Requirement (DC +/- 5%) 12V +/-15% 3.3V +/- 15%

Operating (W, max average) 18

Idle (W) 6

Physical Size

z-height (mm) 15

Dimensions (width x length, mm)

Environmental

Operating Temperature 0° to 70°C (Case)

Non-Operating Temperature

0TS1875 0TS2046 0TS2053 0TS2060 WUS4BA119DSP3Xz 1,920G B 1 DW/ D

0TS1877 0TS2048 0TS2055 0TS2062 WUS4BA138DSP3Xz 3,840GB 1 D W/D

0TS1879 0TS2050 0TS2057

0TS1881 0TS2051 0TS2058

0TS 1874 0TS204 5 0TS2052 0TS2059 WUS4C6416DSP3Xz 1,600GB 3 DW/ D

0TS 18 76 0TS2047 0TS2054 0TS2061 WUS4C6432DSP3Xz 3,200GB 3 D W/D

0TS1878 0TS2049 0TS2056 0TS2063 WUS4C6464DSP3Xz 6,400GB 3 DW/D

 One megabyte (MB) is equal to one million bytes, one gigabyte (GB) is

equal to 1,000MB (one billion bytes), one terabyte (TB) is equal to 1,000GB (one trillion bytes), and one petabyte (PB) is equal to 1,000TB. Actual user capacity may be less due to operating environment.

 Endurance rating based on DW/D using 4KiB random write workload over

5 years.

Based on internal testing. Performance will vary by capacity point, or with the

3311 3311 3311 3311 3311 3311 3311

2181 3100 3057 3046 2198 3184 3059

108K 159K 160K 149K 224K 257K 25 3K

231K 389K 373K 401K 341K 503K 472K

139 141 157 159 139 141 155

24×7

40C/90-day equivalent

69.85 × 100.45

-40° to 85°C

Part Number

SE ISE TCG Ruby TCG FIPS 140 –2 Model Number Capacity Endurance

0TS2064 WUS4BA176DSP3Xz 7,6 80 G B

0TS2065 WUS 4B A1A1DSP 3X z 15,360GB

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.

Measured as 100% Random Read, 4KiB, QD=1, 99.99%

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

1 D W/ D

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.

Values are based on ambient temperature. Avoid non-operational exposure

to temperatures in excess of 40°C for periods exceeding three months.

Compared to previous generation in same form factor, 1DW/D.

z = Encryption Setting

1 = Secure Erase

3 = Instant Secure Erase

4 = TCG Ruby

5 = TCG FIPs 140–2

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www.westerndigital.com

©2020 Western D igital C orpor ation or it s afﬁliates. All r ights res erved . Western Dig ital, the Western Di gital lo go, and Ultrasta r are registered tra demarks or trad emarks of Western D igital Corpo ration or its af ﬁliates in the US a nd/or ot her countries . The NVMe word mark i s a trademark of N VM Express. In c. All other mark s are the proper ty of the resp ective owners. R eferences in this p ublication to Wes tern Digital pro ducts, progra ms, or service s do not imply that th ey will be made avai lable in all count ries. Produc t speciﬁc ations p rovided a re sample s peciﬁc ations t hat are sub ject to cha nge and do n ot const itute a war ranty. Ple ase visit t he Suppo rt sect ion of our w ebsite, www.westerndigital.com/support, for additional information on product speciﬁcations. Pictures shown may vary from actual products.

02–05-WW-04– 00227-A03 June 2020