Adam_a

Seagate Demonstrates World’s Fastest SSD

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With new innovations such as maximizing PCIe lanes and the NVMe protocol, latency is vanishing and performance and speed are driving up even higher. Drive vendors have been padding out their traditional flash product lines including Seagate who's picking up the pace. Currently Seagate has the 1200.2 (via partnership with Micron) and its Nytro SSDs, the Nytro XF1440 2.5”, Nytro XM1440 M.2 NVMe SSD, and the Nytro XP6500 Flash Accelerator Card. In this case, instead of going after highly saturated markets, Seagate is offering a unique SSD that is more than 4GB/s faster than the previous fastest-industry SSD on the market. While clearly a niche product today, the new drive gives Seagate a chance to recast their brand as an innovator in flash-based storage.

Seagate Demonstrates World’s Fastest SSD

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It's OCP...there's a lot of "on the edge" going on there. We'll see if/how they can commercialize.

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> Are these numbers for real?

Here's some math to chew on:

x1 PCIe 3.0 lane oscillates at 8 GHz using a 128b/130b "jumbo frame"

That works out to be exactly 8.125 bits per byte (130 bits / 16 bytes).

So, with the x16 edge connector:

x16 lanes @ 8 GHz / 8.125 = 15.75 GB/second MAX HEADROOM

10.0 / 15.75 = 63.4% efficiency, or ~37% aggregate controller overhead

(e.g. probably due in part to an on-board PLX-type chip).

That 37% will probably come down, as they tune the firmware.

If you prefer rounding, then:

assume 1.0 GB/second per x1 PCIe 3.0 lane

-and-

assume 2.0 GB/second per x1 PCIe 4.0 lane.

PCIe 4.0 will oscillate at 16 GHz, doubling MAX HEADROOM to 31.5 GB/second (15.75 x 2).

Hope this helps.

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Great math lesson MRFS! The other thing that's important to remember is this is a demo of one card running synthetic workloads. There's a lot of promise here, but this display is as much about Seagate reminding us that they can do flash too as developing a salable product. Nothing wrong with that of course, but from a branding perspective, Seagate has a more uphill battle than the entrenched players, or even WD who has made a much more substantial investment in flash via HGST (and those sub-acquisitions) and soon to be SanDisk.

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From my understand these cards would show up as 4 independent storage devices and you cannot boot from them.

Sent from my iPhone using Tapatalk

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Booting is not a requirement for this type of storage. As to showing up as multiples, this too has happened with PCIe products in the past, RAIDing them together isn't really a problem. We'll see though how Seagate addresses in the final product. I hope this is more than just a concept and actually makes it to production.

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> these cards would show up as 4 independent storage devices and you cannot boot from them

The other problem with Intel's current PCIe 3.0 chipsets is the

ceiling on upstream bandwidth imposed by the DMI 3.0 link.

Presently, Intel's RST drivers only function downstream

of that DMI link, imposing a limit of x4 lanes @ 8G / 8.125

(call it 4 GB/s w/ rounding).

Lots of reviews are confirming that a single NVMe M.2 SSD

has the same upstream bandwidth as the DMI 3.0 link.

What we're waiting for is a real h/w RAID controller

that supports at least four U.2 ports and is also bootable

e.g. see this WANT AD:

http://supremelaw.org/systems/nvme/want.ad.htm

Here's a similar wiring topology:

4-port.fan-out.cabling.topology.JPG

-OR-

workstation-class motherboards with at least

four integrated U.2 ports and NO (DOA :) SATA-Express ports,

like this:

4xU.2.and.SATA-E.jpg

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