diff --git a/agent.sh b/agent.sh
index 3b70da3..8da5de7 100644
--- a/agent.sh
+++ b/agent.sh
@@ -24,6 +24,7 @@ function start_vm {
     DEFINE_string  'subnet_name' '-'    'SUBNET NAME'           's'
     DEFINE_string  'vm_name'     '-'    'VM NAME'               'm'
     DEFINE_string  'vm_ip'       '-'    'VM CIDR'               'p'
+    DEFINE_string  'volume_id'   '-'    'Volume backend file'   'o'
     DEFINE_boolean 'dryrun'      false  'Enable dry-run mode'   'd'
   
     FLAGS "$@" || exit $?
@@ -49,6 +50,7 @@ function start_vm {
     print_in_color "${COLOR_SYAN}"  "vm:"
     print_in_color "${COLOR_SYAN}"  "  name: ${FLAGS_vm_name}"
     print_in_color "${COLOR_SYAN}"  "  ip: ${vm_ip}"
+    print_in_color "${COLOR_SYAN}"  "  volume backing file: ${FLAGS_volume_id}"
     print_in_color "${COLOR_SYAN}"  "  tap: to generate"
     print_in_color "${COLOR_SYAN}"  "#############################################"
     echo