Western Digital Broadcasts Ultrastar DC SN840 Twin-Port NVMe SSD


Western Digital is introducing a brand new high-end enterprise NVMe SSD, the Ultrastar DC SN840, and a NVMe over Materials 2U JBOF utilizing as much as 24 of those SSDs.

The Ultrastar DC SN840 makes use of the identical 96L TLC and in-house SSD controller because the SN640, however the SN840 presents extra options, efficiency and endurance to serve a better market section than the extra mainstream SN640. The SN840 makes use of a 15mm thick U.2 type issue in comparison with 7mm U.2 (and M.2 and EDSFF choices) for the SN640, which permits the SN840 to deal with a lot greater energy ranges and to accommodate greater drive capacities within the U.2 type issue. The controller remains to be a PCIe Three design so peak sequential learn efficiency is barely sooner than the SN640, however the remainder of the efficiency metrics are a lot sooner than the SN640: random reads now saturate the PCIe Three x4 hyperlink and write efficiency is way greater throughout the board. Energy consumption can attain 25W, however the SN840 supplies a variety of configurable energy states to restrict it to as little as 11W.

Western Digital Ultrastar DC

Enterprise NVMe SSD Specs
 Ultrastar DC SN840 Ultrastar DC SN640

(U.2 variant)
Ultrastar DC SN340
Type Issue2.5″ 15mm U.22.5″ 7mm U.22.5″ 7mm U.2
InterfacePCIe Three x4

or x2+x2 dual-port
PCIe Three x4PCIe Three x4
NAND FlashWestern Digital 96L BiCS4 3D TLC
1.92 TB

3.84 TB

7.68 TB

15.36 TB

1.6 TB

3.2 TB

6.four TB
960 GB

1.92 TB

3.84 TB

7.68 TB
800 GB

1.6 TB

3.2 TB

6.four TB

3.84 TB

7.68 TB

Write Endurance1 DWPDThree DWPD0.eight DWPD2 DWPD0.Three DWPD
Sequential Learn3.Three GB/s3.1 GB/s3.1 GB/s
Sequential Write3.1 GB/s3.2 GB/s2 GB/s1.four GB/s
Random Learn IOPS780ok472ok473ok429ok
Random Write IOPS160ok257ok65ok116ok7k (32kB writes)
Random 70/30 Combined IOPS401ok503ok194ok307ok139ok (32kB writes)
Energetic Energy25 W12 W6.5 W
Guarantee5 years

The SN840 helps dual-port PCIe operation for top availability, a normal characteristic for SAS drives however often solely discovered on enterprise NVMe SSDs which might be prime of the road or special-purpose fashions. Different enterprise-oriented options embrace non-obligatory self-encrypting drive functionality and help for configuring as much as 128 NVMe namespaces.

The SN840 shall be out there in two endurance tiers, rated for 1 drive write per day (DWPD) and three DWPD—pretty normal, however a step up from the 0.eight DWPD and a couple of DWPD tiers supplied by the SN640. The high-endurance tier will provide capacities from 1.6 TB to six.four TB, whereas the lower-endurance tier has barely greater usable capacities at every stage, and provides a 15.36 TB capability on the prime. (The SN640 is because of get a 15.36 TB choice within the EDSFF type issue solely.)

Between the SN840, SN640 and SN340, Western Digital’s enterprise NVMe SSDs now cowl a variety of use instances, all with their newest 96L 3D TLC NAND and in-house controller designs. Shipments of the SN840 start in July.

OpenFlex Information24 NVMe Over Materials JBOF

Utilizing the brand new Ultrastar DC SN840 drives, Western Digital can be introducing a brand new product to its OpenFlex household of NVMe over Materials merchandise. The OpenFlex Information24 is a reasonably easy Ethernet-attached 2U JBOF enclosure supporting as much as 24 SSDs (368TB whole). These drives are linked via a PCIe swap material to as much as six ports of 100Gb Ethernet, offered by RapidFlex NVMeoF controllers that have been developed by current WDC acquisition Kazan Networks. The OpenFlex Information24 is a way more standard-looking JBOF design than the present 3U OpenFlex F3100 that packs its storage in 10 modules with a proprietary type issue; the Information24 additionally has a shorter depth to suit into extra frequent rack sizes. The OpenFlex Information24 can even be barely cheaper and far sooner than their Ultrastar 2U24 SAS JBOF answer.

The OpenFlex Information24 will launch this fall.

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