On Thu, Mar 17, 2022 at 10:44:01AM +0100, Ulf Hansson wrote: > Stating that it can't work is probably not a correct statement. > Certainly it can, but it depends on how "secure" (or clever) the > implementation of the FTL is in the flash media. I mean, nothing > prevents the FTL from doing a real erase on erase block level and > simply let the "secure erase" request wait on that operation to be > completed. Well, that assumes it can find all the previous copied of the data. Having worked with various higher end SSDs FTLs I know they can't, so if an eMMC device could that would very much surpise me given the overhead.
