Home Enterprise Western Digital Ultrastar DC SN840 SSD Announced

Western Digital Ultrastar DC SN840 SSD Announced

by Adam Armstrong
Western Digital Ultrastar DC SN840

Today Western Digital announced a new storage platform, the Western Digital OpenFlex Data24. Along with the new platform, they also announced new NVMe Data Center SSDs in the Western Digital Ultrastar DC SN840. While the SN840 drives come with the OpenFlex Data24, and is designed to work well with it, the drive is also ideal primary storage for HPC or storage arrays looking for high performance, though the drives would be a good fit for AI/ML, OLTP, analytics, and virtualization as well.

Today Western Digital announced a new storage platform, the Western Digital OpenFlex Data24. Along with the new platform, they also announced new NVMe Data Center SSDs in the Western Digital Ultrastar DC SN840. While the SN840 drives come with the OpenFlex Data24, and is designed to work well with it, the drive is also ideal primary storage for HPC or storage arrays looking for high performance, though the drives would be a good fit for AI/ML, OLTP, analytics, and virtualization as well.

Western Digital Ultrastar DC SN840

As we stated in our other article, the Western Digital Ultrastar DC SN840 SSDs will come with the company’s in-house NVMe controller and firmware. The SN840 will use WD’s 96-Layer TLC NAND and come in capacities of 1.6TB, 3.2TB, 6.4TB, 1.92TB, 3.84TB, 7.68TB, 15.36TB in a U.2 form factor. The drive is dual ported for higher availability. Western Digital quotes the SN840 performance at 3,311/3,184 MiB/s Sequential Read/Write and up to 503K IOPS mixed random 70/30 read/write. The drive also offers two different endurance classes depending on workloads: 1DWPD for read intensive and 3DWPD for mixed.

Western Digital Ultrastar DC SN840 SSD Specifications

Endurance1 DW/D1 DW/D1 DW/D1 DW/D3 DW/D3 DW/D3 DW/D
Capacity1,920GB3,840GB7,680GB15,360GB1,600GB3,200GB6,400GB
Maximum Petabytes Written3.5047.00814.01628.0328.7617.5235.04
InterfaceWestern Digital NVMe 1.3c Controller, Dual Port PCIe 3.1 1×4 or 2×2
Form FactorU.2 2.5-inch, 15mm
Flash Memory TechnologyWestern Digital 96-Layer 3D TLC NAND
Performance
Read Throughput (max MiB/s, Seq 128KiB)3311331133113311331133113311
Write Throughput (max MiB/s, Seq 64KiB)2181310030573046219831843059
Read IOPS (max, Rnd 4KiB)736K780K780K780K736K780K780K
Write IOPS (max, Rnd 4KiB)108K159K160K149K224K257K253K
Mixed IOPS (max, 70/30 R/W, 4KiB)231K389K373K401K341K503K472K
Read Latency (μs)139141157159139141155
Reliability
Uncorrectable Bit Error Rate1 in 10^17
MTBF (M hours, projected)2.5M hours
Annualized Failure Rate5 (AFR, projected)0.35%
Availability24 hours x 7 days/week
Limited Warranty (years)5
Data Retention40C/90-day equivalent
Power
Requirement (DC +/- 5%)2V +/-15% 3.3V +/- 15%
Operating (W, max average)18
Idle (W)6
Physical Size
z-height (mm)15
Dimensions (w x l, mm)69.85 x 100.45
Environmental
Operating Temperature0° to 70°C (Case)
Non-Operating Temperature-40° to 85°C

Western Digital Ultrastar DC SN840 Availability

Ultrastar DC SN840 NVMe SSD is targeted for next month, July 2020

Western Digital Ultrastar NVMe Drives

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