On Tue, 10 Jul 2012 18:51:22 +0200 Sebastian Hegler <sebastian.hegler@xxxxxxxxxxxxx> wrote: > Hi! > Hi, thanks for all the extra details. I should have asked which kernel you were running. I'm guessing that it is earlier than 2.6.25, and so is missing upstream commit 25156198235325805cd7295ed694509fd6e3a29e that fixes a bug which causes reshape not to restart if array was assembled auto-read-only. http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=25156198235325805cd7295ed694509fd6e3a29e The mdadm bug is because we never tested the code with anything but IMSM arrays because those are the only ones that need to use it. Adding a test for 'mdstat' being NULL and not trying to call verify_reshape_position in that case is the simplest fixed I expect, though I haven't tested yet. Possibly something more thorough is needed. NeilBrown
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