diff --git a/instances/views.py b/instances/views.py
index c16aa31..70fb9bf 100644
--- a/instances/views.py
+++ b/instances/views.py
@@ -389,6 +389,7 @@ def instance(request, compute_id, vname):
         cache_modes = sorted(conn.get_cache_modes().items())
         default_cache = settings.INSTANCE_VOLUME_DEFAULT_CACHE
         default_format = settings.INSTANCE_VOLUME_DEFAULT_FORMAT
+        default_owner = settings.INSTANCE_VOLUME_DEFAULT_OWNER
         formats = conn.get_image_formats()
 
         busses = conn.get_busses()
@@ -546,14 +547,14 @@ def instance(request, compute_id, vname):
                                    compute.type)
                 storage = request.POST.get('storage', '')
                 name = request.POST.get('name', '')
-                format = request.POST.get('format', '')
+                format = request.POST.get('format', default_format)
                 size = request.POST.get('size', 0)
                 meta_prealloc = request.POST.get('meta_prealloc', False)
-                bus = request.POST.get('bus', '')
-                cache = request.POST.get('cache', '')
+                bus = request.POST.get('bus', default_bus)
+                cache = request.POST.get('cache', default_cache)
                 target = get_new_disk_dev(disks, bus)
                 
-                path = connCreate.create_volume(storage, name, size, format, meta_prealloc)
+                path = connCreate.create_volume(storage, name, size, format, meta_prealloc, default_owner)
                 conn.attach_disk(path, target, subdriver=format, cache=cache, targetbus=bus)
                 msg = _('Attach new disk')
                 addlogmsg(request.user.username, instance.name, msg)
diff --git a/vrtManager/instance.py b/vrtManager/instance.py
index 3cc99e4..d5bc1b9 100644
--- a/vrtManager/instance.py
+++ b/vrtManager/instance.py
@@ -713,13 +713,11 @@ class wvmInstance(wvmConnect):
                 source_file = elm.get('file')
                 if source_file:
                     clone_dev_path.append(source_file)
-                    clone_path = os.path.join(os.path.dirname(source_file),
-                                              target_file)
+                    clone_path = os.path.join(os.path.dirname(source_file), target_file)
                     elm.set('file', clone_path)
 
                     vol = self.get_volume_by_path(source_file)
-                    vol_format = util.get_xml_path(vol.XMLDesc(0),
-                                                   "/volume/target/format/@type")
+                    vol_format = util.get_xml_path(vol.XMLDesc(0), "/volume/target/format/@type")
 
                     if vol_format == 'qcow2' and meta_prealloc:
                         meta_prealloc = True
@@ -742,8 +740,7 @@ class wvmInstance(wvmConnect):
                     elm.set('name', clone_name)
 
                     vol = self.get_volume_by_path(source_name)
-                    vol_format = util.get_xml_path(vol.XMLDesc(0),
-                                                   "/volume/target/format/@type")
+                    vol_format = util.get_xml_path(vol.XMLDesc(0), "/volume/target/format/@type")
 
                     vol_clone_xml = """
                                     <volume type='network'>
diff --git a/vrtManager/storage.py b/vrtManager/storage.py
index 7dc7515..21a1a7a 100644
--- a/vrtManager/storage.py
+++ b/vrtManager/storage.py
@@ -1,5 +1,6 @@
 from vrtManager import util
 from vrtManager.connection import wvmConnect
+from webvirtcloud.settings import INSTANCE_VOLUME_DEFAULT_OWNER as owner
 
 
 class wvmStorages(wvmConnect):
@@ -205,7 +206,7 @@ class wvmStorage(wvmConnect):
             )
         return vol_list
 
-    def create_volume(self, name, size, vol_fmt='qcow2', metadata=False):
+    def create_volume(self, name, size, vol_fmt='qcow2', metadata=False, owner=owner):
         size = int(size) * 1073741824
         storage_type = self.get_type()
         alloc = size
@@ -222,8 +223,8 @@ class wvmStorage(wvmConnect):
                 <target>
                     <format type='%s'/>
                      <permissions>
-                        <owner>107</owner>
-                        <group>107</group>
+                        <owner>%s</owner>
+                        <group>%s</group>
                         <mode>0644</mode>
                         <label>virt_image_t</label>
                     </permissions>
@@ -232,10 +233,10 @@ class wvmStorage(wvmConnect):
                         <lazy_refcounts/>
                     </features>
                 </target>
-            </volume>""" % (name, size, alloc, vol_fmt)
+            </volume>""" % (name, size, alloc, vol_fmt, owner, owner)
         self._createXML(xml, metadata)
 
-    def clone_volume(self, name, target_file, vol_fmt=None, metadata=False):
+    def clone_volume(self, name, target_file, vol_fmt=None, metadata=False, owner=owner):
         storage_type = self.get_type()
         if storage_type == 'dir':
             target_file += '.img'
@@ -250,8 +251,8 @@ class wvmStorage(wvmConnect):
                 <target>
                     <format type='%s'/>
                     <permissions>
-                        <owner>107</owner>
-                        <group>107</group>
+                        <owner>%s</owner>
+                        <group>%s</group>
                         <mode>0644</mode>
                         <label>virt_image_t</label>
                     </permissions>
@@ -260,5 +261,5 @@ class wvmStorage(wvmConnect):
                         <lazy_refcounts/>
                     </features>
                 </target>
-            </volume>""" % (target_file, vol_fmt)
+            </volume>""" % (target_file, vol_fmt, owner,owner)
         self._createXMLFrom(xml, vol, metadata)
diff --git a/webvirtcloud/settings.py.template b/webvirtcloud/settings.py.template
index 72c5460..8f20dd8 100644
--- a/webvirtcloud/settings.py.template
+++ b/webvirtcloud/settings.py.template
@@ -152,3 +152,5 @@ VIEW_INSTANCES_LIST_STYLE = 'grouped'
 INSTANCE_VOLUME_DEFAULT_FORMAT = 'qcow2'
 INSTANCE_VOLUME_DEFAULT_BUS = 'virtio'
 INSTANCE_VOLUME_DEFAULT_CACHE = 'directsync'
+# up to os, 0=root, 107=qemu or libvirt-bin(for ubuntu)
+INSTANCE_VOLUME_DEFAULT_OWNER = 0
\ No newline at end of file