Okay, so we need to grep dmesg looking for a message like that above about reshaping.So let's grep for "md/raid" and see what we get ...
root@nas:~# dmesg | grep md/raid [ 321.819562] md/raid:md0: not clean -- starting background reconstruction[ 321.819564] md/raid:md0: reshape_position too early for auto-recovery - aborting.
(again: thanks a lot for your help. I never expected that! :-) )
