Enhanced data density and speed upgrades, though challenges in endurance remain
Micron is now mass producing 232-layer QLC NAND, claiming it's the first memory manufacturer to break the 200-layer mark in QLC chips.
More layers improves density so Micron naturally claims its 232-layer QLC flash is the densest in the world, beating its closest rivals by up to 28 percent, according to the memory maker. However, Micron's new QLC isn't quite dense enough to make NAND chips with 2 TB of memory, and for now the biggest chips only go up to 1 TB.
As is typical with QLC, though, sustained write performance is not great. At least on Micron's 2500 SSD, which is based on the company's 232-layer QLC, write performance drops off significantly after writing roughly 10 percent of a drive's capacity, which represents the fast pseudo-SLC cache. Once that cache is exhausted, write speeds can plummet down to just a few hundred megabytes per second.
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