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Kioxia Researchers Demo Hepta-Level Cell NAND Flash

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Re: Kioxia Researchers Demo Hepta-Level Cell NAND Flash

#4

Post by 7speter »

ksec wrote: post #3

Doesn't really change anything. Current 4TB SSD is about $200. And that is close to selling at cost or lost. Even if they achieve it the price per TB will likely be the same just offering them better margins.

I imagine because this NAND has more layers, its going to be have even less endurance than and write speeds than QLC? It may eventually be cheap but, whew boy whats the use case if the loss in performance as layers increase scales linearly?

Re: Kioxia Researchers Demo Hepta-Level Cell NAND Flash

#5

Post by tenebrisalietum »

7speter wrote: post #4
ksec wrote: post #3

Doesn't really change anything. Current 4TB SSD is about $200. And that is close to selling at cost or lost. Even if they achieve it the price per TB will likely be the same just offering them better margins.

I imagine because this NAND has more layers, its going to be have even less endurance than and write speeds than QLC? It may eventually be cheap but, whew boy whats the use case if the loss in performance as layers increase scales linearly?

I guess overprovisioning? Maybe your 16TB 7LC NAND will have 48TB of actual space.

Re: Kioxia Researchers Demo Hepta-Level Cell NAND Flash

#6

Post by kube-system »

ksec wrote: post #3

Doesn't really change anything. Current 4TB SSD is about $200. And that is close to selling at cost or lost. Even if they achieve it the price per TB will likely be the same just offering them better margins.

Why would price per TB be the same? The whole point of cramming more levels into the same cells is that you can store more data in the same number of flash cells.

Re: Kioxia Researchers Demo Hepta-Level Cell NAND Flash

#7

Post by so-and-so »

tenebrisalietum wrote: post #5
7speter wrote: post #4

Earlier quoted context omitted.

I imagine because this NAND has more layers, its going to be have even less endurance than and write speeds than QLC? It may eventually be cheap but, whew boy whats the use case if the loss in performance as layers increase scales linearly?

I guess overprovisioning? Maybe your 16TB 7LC NAND will have 48TB of actual space.

Back in the day there were programs that would store data on VHS types with 200% overprovisioning.

Re: Kioxia Researchers Demo Hepta-Level Cell NAND Flash

#9

Post by rektide »

So each cell is now a x86 cache line wide, that's wild.

I have a hard time imagining this is useful or good for many apications, as I just expect endurance to be awful. But given how much data warehousing we do, there is definitely some potential for this, as a post-nearline storage.

This also seems like something zones storage would be so good for, to help reduce write-amplification concerns. Alas there are still zero drives one can go slap down a credit card & purchase.

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