[HN Gopher] Kioxia Researchers Demo Hepta-Level Cell NAND Flash
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       Kioxia Researchers Demo Hepta-Level Cell NAND Flash
        
       Author : coobird
       Score  : 17 points
       Date   : 2023-04-03 23:20 UTC (23 hours ago)
        
 (HTM) web link (www.tomshardware.com)
 (TXT) w3m dump (www.tomshardware.com)
        
       | ksec wrote:
       | 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.
        
         | 7speter wrote:
         | 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?
        
           | sitkack wrote:
           | Use it like tape, write once and archive it in a freezer.
        
           | tenebrisalietum wrote:
           | I guess overprovisioning? Maybe your 16TB 7LC NAND will have
           | 48TB of actual space.
        
             | so-and-so wrote:
             | Back in the day there were programs that would store data
             | on VHS types with 200% overprovisioning.
        
         | kube-system wrote:
         | 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.
        
       | rektide wrote:
       | 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.
        
       | NKosmatos wrote:
       | Is it only me who doesn't like 7 bits per cell? I prefer
       | endurance and reliability (SLC, MLC, TLC...even QLC) over
       | capacity (PLC, HLC, 7LC).
        
         | phkahler wrote:
         | >> Is it only me who doesn't like 7 bits per cell? I prefer
         | endurance and reliability
         | 
         | No, it's not just you, and judging by how strongly I feel about
         | it, it's not just the two of us.
         | 
         | When I find a flash drive that's been sitting for a few years
         | and I can still read it I always feel a sense of relief. I feel
         | like everything we've got today is too advanced to maintain the
         | slightest glitch.
        
       | gaudat wrote:
       | The caveat is requiring liquid nitrogen.
        
         | so-and-so wrote:
         | And a Pro model with helium cooling :)
        
       | fmajid wrote:
       | I shudder to think of the P/E cycle endurance. QLC is already
       | abysmal at 100-1,000 or so so if the SLC-MLC-TLC-QLC trend holds,
       | it will be in the order of 10 or so in the first generation.
        
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       (page generated 2023-04-04 23:02 UTC)