set -e
# Make a raid1,  add a device, then remove it again.

$mdadm -CR $md0 -l1 -n2 -x1 $dev0 $dev1 $dev2  
$check resync
$check wait
$check state UU

$mdadm --grow $md0 -n 3
$check recovery
$check wait
$check state UUU

$mdadm $md0 --fail $dev0 
$check state _UU

$mdadm --grow $md0 -n 2
$check state UU

$mdadm -S $md0
# same again for version-1


$mdadm -CR $md0 -l1 -n2 -e1.2 -x1 $dev0 $dev1 $dev2  
$check resync
$check wait
$check state UU

$mdadm --grow $md0 -n 3
$check recovery
$check wait
$check state UUU

$mdadm $md0 --fail $dev0 
$check state _UU

$mdadm --grow $md0 -n 2
$check state UU

$mdadm -S $md0