Western Digital is introducing a brand new high-end enterprise NVMe SSD, the Ultrastar DC SN840, and a NVMe over Fabrics 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 affords extra options, efficiency and endurance to serve a better market phase than the extra mainstream SN640. The SN840 makes use of a 15mm thick U.2 kind 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 kind 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. Power consumption can attain 25W, however the SN840 offers a spread of configurable energy states to restrict it to as little as 11W.
| Western Digital Ultrastar DC Enterprise NVMe SSD Specifications |
|||||||
| Ultrastar DC SN840 | Ultrastar DC SN640 (U.2 variant) |
Ultrastar DC SN340 | |||||
| Form Factor | 2.5″ 15mm U.2 | 2.5″ 7mm U.2 | 2.5″ 7mm U.2 | ||||
| Interface | PCIe Three x4 or x2+x2 dual-port |
PCIe Three x4 | PCIe Three x4 | ||||
| NAND Flash | Western Digital 96L BiCS4 3D TLC | ||||||
| Capacities |
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 |
||
| Write Endurance | 1 DWPD | Three DWPD | 0.eight DWPD | 2 DWPD | 0.Three DWPD | ||
| Sequential Read | 3.Three GB/s | 3.1 GB/s | 3.1 GB/s | ||||
| Sequential Write | 3.1 GB/s | 3.2 GB/s | 2 GB/s | 1.four GB/s | |||
| Random Read IOPS | 780ok | 472ok | 473ok | 429ok | |||
| Random Write IOPS | 160ok | 257ok | 65ok | 116ok | 7k (32kB writes) | ||
| Random 70/30 Mixed IOPS | 401ok | 503ok | 194ok | 307ok | 139ok (32kB writes) | ||
| Active Power | 25 W | 12 W | 6.5 W | ||||
| Warranty | 5 years | ||||||
The SN840 helps dual-port PCIe operation for top availability, a normal function for SAS drives however often solely discovered on enterprise NVMe SSDs which can be high of the road or special-purpose fashions. Other enterprise-oriented options embody optionally available self-encrypting drive functionality and help for configuring as much as 128 NVMe namespaces.
The SN840 shall be obtainable in two endurance tiers, rated for 1 drive write per day (DWPD) and three DWPD—pretty commonplace, however a step up from the 0.eight DWPD and a couple of DWPD tiers provided 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 high. (The SN640 is because of get a 15.36 TB choice within the EDSFF kind 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 Knowledge24 NVMe Over Fabrics JBOF
Using the brand new Ultrastar DC SN840 drives, Western Digital can be introducing a brand new product to its OpenFlex household of NVMe over Fabrics merchandise. The OpenFlex Knowledge24 is a reasonably easy Ethernet-attached 2U JBOF enclosure supporting as much as 24 SSDs (368TB complete). These drives are linked by a PCIe swap material to as much as six ports of 100Gb Ethernet, supplied by RapidFlex NVMeoF controllers that had been developed by latest WDC acquisition Kazan Networks. The OpenFlex Knowledge24 is a way more standard-looking JBOF design than the prevailing 3U OpenFlex F3100 that packs its storage in 10 modules with a proprietary kind issue; the…
