workaround sequence:
mdadm --remove <incomplete-md-device> <arbitrary-member-device-of-incomplete-array>
mdadm --incremental --run <arbitrary-member-device-of-incomplete-array>
workaround sequence:
mdadm --remove <incomplete- md-device> <arbitrary- member- device- of-incomplete- array>
mdadm --incremental --run <arbitrary- member- device- of-incomplete- array>