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I couldn't find info on SSD yields, do you know where to find it? I found that HDD factories generally target 97+% yield. So, if SSD yields are much lower, yo
by jaawn 11y ago
I couldn't find info on SSD yields, do you know where to find it? I found that HDD factories generally target 97+% yield. So, if SSD yields are much lower, you bring up a good point.
- ars 11y agoSSDs probably have very very good yield because unlike a CPU if any parts are damaged they can just work around them. They can even sell them as lower capacity drives. I'd be surprised is the yield was not 100%.
- oasisbob 11y agoI was referring more to the NAND fabrication yield, eg: http://semimd.com/blog/2014/01/29/3d-nand-to-10-nm-and-beyond/ http://semimd.com/blog/2014/01/29/3d-nand-to-10-nm-and-beyon... http://www.theregister.co.uk/2015/04/09/3d_nand_gigantically_expensive_to_make/ http://www.theregister.co.uk/2015/04/09/3d_nand_gigantically... I'm making the assumption that NAND flash is binned and derated based on defects. ie, to make this drive, Samsung needs to fab 256Gbit dies. As this is on the leading-edge of their production capabilities, I'm guessing that the defect rate is not negligible, and that they accidentally make lower-capacity chips a significant portion of the time.