# Create an array, fail one device while array is active, stop array,
# then re-assemble listing the failed device first.

mdadm -CR $md1 -l5 -n4 $dev0 $dev1 $dev2 $dev3
check wait

echo 2000 > /sys/block/md1/md/safe_mode_delay
mkfs $md1
mdadm $md1 -f $dev0
mdadm -S $md1
mdadm -A $md1 $dev0 $dev1 $dev2 $dev3 || exit 1