[HN Gopher] Micron's 232-layer NAND enables 2TB flash chips that... ___________________________________________________________________ Micron's 232-layer NAND enables 2TB flash chips that deliver data 50% faster Author : samizdis Score : 54 points Date : 2022-07-26 20:54 UTC (2 hours ago) (HTM) web link (spectrum.ieee.org) (TXT) w3m dump (spectrum.ieee.org) | Robotbeat wrote: | At what point will the wear resistance be so low from increasing | the layers (and bits) per cell that flash becomes effectively | write-once, read many (WORM)? | hinkley wrote: | Levels per cell and wear I understand. What's the link between | circuit layer depth and wear? | lazide wrote: | Keep in mind, these are layers of cells, not multi-level cells. | Each of the layers has an individual multi-level cell. | | That said, Samsung quad-level cells only have 1k write | lifetime, so likely not far off. | hinkley wrote: | I love how someone said there's a septuple-level cell out | there... but you have to immerse it in liquid nitrogen for it | to work. | __alexs wrote: | PLC NAND is already on the way to commercial hardware. | mritun wrote: | Remember, even 1000 writes means roughly 3Y of full drive | writes per day with the naive wear leveling and the most | brutal write load. For most write loads the drives made of | this kind of NAND can be easily warranted for 3Y. | lazide wrote: | Yeah, 1K is still in the range of reasonable (if the wear | leveling isn't terrible), another order of magnitude | decrease though and we're getting on the edge of not. | Dylan16807 wrote: | Increasing layers should cause roughly zero problems. | | As far as bits per cell, 4 already gives you very slow writes | and not a lot of them. Let's say that maxes out at 5 or 6. | [deleted] | dale_glass wrote: | There was a paper a while back that promised a healing process | for flash: | | https://www.zdnet.com/article/self-healing-flash-for-infinit... | | I have no idea what happened to that though, because it sounded | extremely promising. ___________________________________________________________________ (page generated 2022-07-26 23:00 UTC)