+btrbk_test="systemctl is-active btrbk.service"
+while [[ $($new_shell $btrbk_test) != inactive ]] || [[ $($old_shell $btrbk_test) != inactive ]]; do
+ echo "$0: btrbk is running on new or old host. sleeping for 8 seconds"
+ sleep 6
+ echo "$0: testing for btrbk activity in 2 seconds"
+ sleep 2
+done
+