-set -e
# create a raid5, fail and remove a drive during initial sync
# Add two more, fail and remove one
mdadm -CR $md0 -l5 -n4 $dev0 $dev1 $dev2 $dev3
check recovery
-mdadm $md0 --fail $dev3
+mdadm $md0 --fail $dev3
+sleep 1
check nosync
check state UUU_