Bug#813335: mdadm: Upgrade from jessie to testing breaks boot with raid on lvm2

[Lennart Weller]

Control: found 3.3.2-5+deb8u1

It's probably the patch which was released a few months ago in testing and a few
days ago also in stable as 3.3.2-5+deb8u1 is also affected. As can be seen here:
http://unix.stackexchange.com/questions/258790/

Try reversing the patch locally and see if it fixes your problem:
--- a/lib/udev/rules.d/64-md-raid-assembly.rules
+++ b/lib/udev/rules.d/64-md-raid-assembly.rules
@@ -25,6 +25,9 @@ GOTO="md_inc_end"

 LABEL="md_inc"

+# Disable incremental assembly to fix Debian bug #784070
+GOTO="md_inc_end"
+
 # remember you can limit what gets auto/incrementally assembled by
 # mdadm.conf(5)'s 'AUTO' and selectively whitelist using 'ARRAY'
 ACTION=="add|change", IMPORT{program}="BINDIR/mdadm --incremental --export $tempnode --offroot ${DEVLINKS}"