Hi,
I ran into this or something similar. My system would boot fine on
an older kernel but fail on a new oue. Can't remember which one worked
and which didn't. The solution I found was remove the bitmap, re-boot on
the newer kernel, and add the bitmap back.
# remove
mdadm --grow --bitmap=none /dev/md127
# create - but not while resyncing
mdadm --grow --bitmap=internal /dev/md127
How did you ever discover this was the cause, and know what to do to fix it?
Thanks,
Alex