On 3/12/19 12:55 PM, Wols Lists wrote: > My only guess is that the upgrade is then causing an unclean shutdown, > which is making the system think the two drives aren't properly mirrored > at boot. fwiw, here it's opensuse. initrd's managed by dracut. there's this in-place, /usr/lib/dracut/modules.d/90mdraid/md-shutdown.sh #!/bin/sh _do_md_shutdown() { local ret local final=$1 local _offroot=$(strstr "$(mdadm --help-options 2>&1)" offroot && echo --offroot) info "Waiting for mdraid devices to be clean." mdadm $_offroot -vv --wait-clean --scan| vinfo ret=$? info "Disassembling mdraid devices." mdadm $_offroot -vv --stop --scan | vinfo ret=$(($ret+$?)) if [ "x$final" != "x" ]; then info "/proc/mdstat:" vinfo < /proc/mdstat fi return $ret } if command -v mdadm >/dev/null; then _do_md_shutdown $1 else : fi doesn't seem to me that there's anything problematic in there ... I'd have thought to see _some_ related error in dmesg/journal afterwards. so far, as mentioned, haven't _noticed_ anything. yet.