Just a quick note, here's a workaround for jessie:
cat <<_eof > /etc/udev/rules.d/65-md-raid-blkid-HACK_FOR_JESSIE.rules
SUBSYSTEM!="block", GOTO="md_hack_end"
ACTION!="add|change", GOTO="md_hack_end"
KERNEL!="md*", GOTO="md_hack_end"
IMPORT{builtin}="blkid"
LABEL="md_hack_end"
_eof
udevadm control --reloadRemove it after upgrade to stretch, although it also won't hurt much if it stays around. -- .''`. martin f. krafft <[email protected]> @martinkrafft : :' : proud Debian developer `. `'` http://people.debian.org/~madduck `- Debian - when you have better things to do than fixing systems
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