On Thu, 2018-03-08 at 15:43 +0100, Richard Weinberger wrote: > As stated by David Woodhouse, it was a huge mistake by UBI to not > reject MLC > NAND from the very beginning. Correction: when we were developing UBI/UBIFS and upstreamed them, MLC was widely used yet we did not really know about it. So there was nothing to reject yet. The mistake is that we did not add the reject timely. When people started reporting MLC issues we were answering that UBI/UBIFS stack needs more work to make MLC safe to use, and we hoped someone would do the work. Artem.