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Subject: Re: ubifs error at boot "bad node type"
From: Artem Bityutskiy <dedekind1@gmail.com>
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To: Richard Genoud <richard.genoud@gmail.com>
Date: Wed, 16 Jul 2014 11:29:07 +0300
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Cc: linux-mtd@lists.infradead.org, Adrian Hunter <adrian.hunter@intel.com>
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On Tue, 2014-07-08 at 12:10 +0200, Richard Genoud wrote:
> ubiattach is ok:
> # ubiattach -m 3
> [   50.164062] UBI: default fastmap pool size: 95
> [   50.164062] UBI: default fastmap WL pool size: 25

I do not know why this happened, I never saw reports like this before.
Most probably this is because of fastmap. I did not hear any report that
it was extensively verified WRT power cuts, and my theory is that there
is a bug in fastmap which causes this, and this may be related to power
cuts. I do not have proves, but suggest you to dig in this direction.
E.g., setup power-cut testing.

-- 
Best Regards,
Artem Bityutskiy