Performance Tested Against Shrinking SSD Die Size

Written by John Ponio    Friday, 17 February 2012 18:19

Intel Micron 20nm NAND Flash

The die size of today's newest NAND flash memory that used in solid state hard drives is 25nm, but it wasn't always like that and won't stay like that for long. Just for fun, a few researchers decided to test NAND memory and compare the results between the different die sizes, all of the way from 72nm to 25nm, and what they found isn't very good. They found that as NAND memory ages, a smaller die size means substantially more error rates. According to their study, anything smaller than 6.5nm, which is expected to come out in 2024, will be just about useless because of the high error rates. They also compared single-layer-cell, multi-layer-cell, and triple-layer cell, and found that the errors rates of the aged NAND went from better to worst, respectively, but all had worse error rates as their die size shrunk. Larua Grupp, a leader of the research team, said at a recent conference, "This makes the future of SSDs cloudy: While the growing capacity of SSDs and high IOP rates will make them attractive for many applications, the reduction in performance that is necessary to increase capacity while keeping costs in check may make it difficult for SSDs to scale as a viable technology for some applications." You can read more about it here