Hi, mdadm wrote:

ATM I am still not sure about what caused the crash, maybe you are right
and there is a hw problem. I assume it is the  memory.

Personally I would, if I saw such an error, immediately stop the system,
run memtest86+ on it, and either replace the faulty RAM or, if no problem
is found, do the reconstruction on a different mainboard.

Bit errors scare me. The idea that the problem will propagate to some
unknown area of a presumed-good array scares me even more. (I speak from
painful experience here.)

-- 
Matthias Urlichs   |   {M:U} IT Design @ m-u-it.de   |  smurf@smurf.noris.de
Disclaimer: The quote was selected randomly. Really. | http://smurf.noris.de
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The price of seeking to force our beliefs on others is that someday
they might force their beliefs on us.
		-- Mario Cuomo