do_facet $SINGLEMDS lctl pool_add $FSNAME.$POOL $FSNAME-OST0000_UUID
RC=$?; [[ $RC -eq 0 ]] || \
error "pool_add failed. $FSNAME $POOL $FSNAME-OST0000_UUID: $RC"
do_facet $SINGLEMDS lctl pool_remove $FSNAME.$POOL $FSNAME-OST0000_UUID
drain_pool $POOL
do_facet $SINGLEMDS lctl pool_add $FSNAME.$POOL $FSNAME-OST0000_UUID
RC=$?; [[ $RC -eq 0 ]] || \
error "pool_add failed. $FSNAME $POOL $FSNAME-OST0000_UUID: $RC"
do_facet $SINGLEMDS lctl pool_remove $FSNAME.$POOL $FSNAME-OST0000_UUID
drain_pool $POOL