it was your last chance as you can see /dev/md2 is out....
But there is something i don't understand, you have 4 disk for an array of raid1, what is the goal because we have generally up to 3 disk for a raid1, but never four.
have you played with your raid configuration ?
what is the return of that
mdadm --detail /dev/md2
mdadm --detail /dev/md1