On Sun, Dec 17, 2017 at 12:53:36PM -0300, Ezequiel Garcia wrote: > If not too much to ask, this is the test that I believe is needed. > You seem to have a setup ready, hence why I'm asking you, if > possible, to give it a shot. > > (1) Scrub the BBT from the NAND. Or scrub the whole NAND. > You cannot do this from the kernel, it needs to be done from the bootloader. > > (2) Mark a couple blocks as bad using the OOB -- AFAICR, there > was a command to do this in the bootloader. > > (3) Boot, let Linux create the BBT and see if it catches the bad blocks.
Are the current boot loaders safe regarding the scrub operation ? I'm asking because that's how I bricked my mirabox a few years ago when trying to mark a bad block from u-boot :-/ If someone has a good knowledge of these commands to limit the risk and helps me only playing with a small part at the end of the flash (or in the unused area) I'd prefer it :-) > This would guarantee that devices with factory bad blocks, > (and no BBT), would be OK with this patch. I see. I'm fine with trying provided I have reasonably good assurance that I won't have to go through the kwboot pain again :-/ Cheers, Willy
