diff --git a/RO-VIM-openstack/osm_rovim_openstack/vimconn_openstack.py b/RO-VIM-openstack/osm_rovim_openstack/vimconn_openstack.py
index a15a53c..8f96f6b 100644
--- a/RO-VIM-openstack/osm_rovim_openstack/vimconn_openstack.py
+++ b/RO-VIM-openstack/osm_rovim_openstack/vimconn_openstack.py
@@ -1867,6 +1867,7 @@
 
             # Create additional volumes in case these are present in disk_list
             base_disk_index = ord("b")
+            boot_volume_id = None
             if disk_list:
                 block_device_mapping = {}
                 for disk in disk_list:
@@ -1876,11 +1877,13 @@
                         ]
                     else:
                         if "image_id" in disk:
+                            base_disk_index = ord("a")
                             volume = self.cinder.volumes.create(
                                 size=disk["size"],
                                 name=name + "_vd" + chr(base_disk_index),
                                 imageRef=disk["image_id"],
                             )
+                            boot_volume_id = volume.id
                         else:
                             volume = self.cinder.volumes.create(
                                 size=disk["size"],
@@ -1912,6 +1915,8 @@
                         "Timeout creating volumes for instance " + name,
                         http_code=vimconn.HTTP_Request_Timeout,
                     )
+                if boot_volume_id:
+                    self.cinder.volumes.set_bootable(boot_volume_id, True)
 
             # get availability Zone
             vm_av_zone = self._get_vm_availability_zone(