mtd-utils io_paral test fails on NAND

Richard Weinberger richard.weinberger at
Fri Nov 22 01:53:00 PST 2019

On Thu, Nov 21, 2019 at 8:54 PM Otto Blom <oblom586 at> wrote:
> Hello All !
> A couple of updates on this problem. Turns out io_read also fails in
> the same way as io_paral - A page of data comes back as all zeros.
> Interestingly I added a retry option to see if it is a read or write
> problem and turns out every single time so far the data is correct
> when I read it a second time.
> In summary when I run it passes about 70% of the time,
> io_paral fails 25% and io_read the remaining 5%
> Any recommendations on what to try next ?

Test one layer deeper. e.g. flash_readtest.


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