Intel maps out Optane’s future, says Penta Level Cell NAND is in the works

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Next-gen Barlow Pass persistent memory to be paired with Cooper Lake and Ice Lake CPUs

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26 September 2019 | 0

In a massive storage data dump, Intel laid out its Optane roadmap and claimed an edge in Penta Level Cell NAND technology. That is not even mentioning the company’s plans for fatter SSDs, and how long it will take to get persistent memory to consumer PCs.

The announcements were made Thursday morning at a storage event in Seoul, South Korea, where Intel showed off some new technology coming down the pike. Intel also announced that, after the very public and amicable divorce from Micron, it is moving its Optane development to Rancho Rio, New Mexico.

Optane Roadmap: Barlow Pass

If you have had a hint that Intel’s been closely aligning its storage efforts with its CPU efforts, that hint turned into a nudge on Thursday: Intel confirmed that its upcoming Cooper Lake and Ice Lake CPUs will have support for its 2nd-generation Optane DC Persistent Memory modules. Codenamed Barlow Pass, the Optane modules will be closely tied with the upcoming Xeon CPUs. A yet unnamed, but rumoured-to-be-called Crow Pass will be tied with its upcoming Sapphire Rapids Xeon CPUs. 

Intel’s Optane DC Persistent Memory are high-density, high-performance, non-volatile memory modules that go into DDR4 slots. Using proprietary methods, they allow servers to pack in terabytes of non-volatile storage closely coupled to the CPU. For software vendors who have optimised for Optane DC Persistent Memory along with Optane SSDs, both performance and cost savings can be very significant, Intel said. 

Intel confirmed that Barlow Pass will be tied to its Cooper Lake and Ice Lake Xeon products

2nd-gen Optane SSD: Alder Stream goes off the page

Intel’s next-generation Optane will expand beyond DC Persistent Modules to build Optane DC SSDs. Code-named Alder Stream, Intel said the performance goes off the page.

Intel’s current Optane-based P4800X demolishes traditional NAND-based SSDs in latency and IOPS

In the performance claim above, Intel shows the prowess of its first gen P4800X Optane DC SSD as it tears up an Intel DC P4610 NAND SSD. Optane’s low latency performance has long been proven. But if you look at the next performance claim, you can see how the next-gen Alder Stream rips in latency and IOP performance. While the 1st-gen P4800X runs out of steam above half a million IOPS, Alder Stream seems nearly unstoppable.

But the next-generation Alder Stream literally goes off the page.

Intel: PLC NAND has an edge

With half the world’s data being created in just the last two years alone, everyone will need more space, Intel officials said. That means our current QLC (Quad-Level Cell) SSDs will not cut it.

For that, Intel said it is moving ahead with plans for five-bits-per-cell NAND, or Penta-Level Cell (PLC). As the name implies, five bits means five possible values for each cell, compared to the original Single Level Cell’s single bit or Quad Level Cell’s four bits per cell.

Intel’s not alone: Toshiba aired its PLC plans last month. Intel, however, said its NAND, built around floating gates, should have an edge over the far more common Charge Trap technique used by most 3D NAND makers. Intel said the floating-gate cells offer larger and more reliable read windows between each cell. That, in turn, means it is easier to increase density with floating-gate cells as QLC density increases, Intel officials said.

Intel said one advantage with its floating-gate approach is an increase in the read window between the cells which gives it more reliability over time

Intel says floating-gate cells will also aid its PLC designs. It is hard to confirm that, but reports have suggested that Micron split from Intel because Micron wanting to dump floating gate for charge trap. While most companies use charge trap designs today, Toshiba is apparently looking at floating gate for its PLC designs. We will not have any hard answers for a year or two.

Intel believes its floating gate cell approach gives it a leg up over charge trapping designs used by just about everyone else today.

Technology details aside, drive capacities are likely to get much larger. Intel officials said the company will introduce 96-layer QLC drives this year and 144-layer QLC drives next year, initially for data centre drives.

Intel did not announce any formal pricing or models, but if you think about today’s 64-layer QLC drives such as the 1TB Intel 660P selling for $94 (€86) today on Amazon, you can imagine what a 96-layer or 144-layer drive might eventually sell for.

Intel plans to introduce 96 layer QLC and 144 layer QLC drives by next year.

Intel DC Persistent Memory DIMMS: not ready for consumers

The last bit of news concerns Intel’s plans to get those DIMM-based Optane modules into consumers’ hands. Today, it is limited solely to data centre applications, and it will soon arrive in workstations. 

Intel officials said the hardware is there, and there is already some support for DIMM-based Optane modules in Windows 10. However, the company believes it will take at least another year or two before applications and the OS can make full use of it.

IDG News Service

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