linux equivalent of u-boot's "nand scrub" (erasing blocks even whenOOB says "bad")

[Jon Povey]

Mike Frysinger wrote:
> i dont have any devices that have dedicated software BBTs.  i'm
> concerned with just the forced erasing of blocks since the rest works
> for me already (forced reading and writing).  the ability to change
> the definition of the OOB is apparently "deprecated" now, so i cant
> fix things on the fly there.

Not quite sure what you mean by the last part. I have used raw writes with OOB, software-generated ECC and altered layout of flash pages, to good effect.

I'm don't know what's deprecated, although the kind of hackery I am doing I wouldn't expect to be encouraged by the API. I do, however, appreciate when such things are possible. Especially on embedded, I don't want a kernel API thinking it knows best about, f.ex., allowing me to erase and rewrite the BBT. Stopping me doing it by accident is fine. Making it impossible is a pain.

--
Jon Povey
jon.povey at racelogic.co.uk

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