Just to add to my comment above in #4, I have checked partition UUIDs using 'blkid', 'mdadm --detail', and 'tune2fs' and everything is consistent and as it should be, except for what 'update-grub' generates.
Just to add to my comment above in #4, I have checked partition UUIDs using 'blkid', 'mdadm --detail', and 'tune2fs' and everything is consistent and as it should be, except for what 'update-grub' generates.