diff --git a/instances/templates/instance.html b/instances/templates/instance.html
index c3baecc..fb2075c 100644
--- a/instances/templates/instance.html
+++ b/instances/templates/instance.html
@@ -355,6 +355,15 @@
                                                                 <small><input type="checkbox" class="js-custom__checkbox" /> {% trans "Custom value" %}</small>
                                                             </div>
                                                         </div>
+                                                        <p style="font-weight:bold;">{% trans "Disk allocation (B):" %}</p>
+                                                        {% for disk in disks %}
+                                                        <div class="form-group">
+                                                            <label class="col-sm-4 control-label" style="font-weight:normal;">{% trans "Current allocation" %} ({{ disk.dev }})</label>
+                                                            <div class="col-sm-4 js-custom__container">
+                                                                <input type="text" name="disk_size_{{ disk.dev }}" class="form-control" value="{{ disk.size|filesizeformat }}" />
+                                                            </div>
+                                                        </div>
+                                                        {% endfor %}
                                                         {% ifequal status 5 %}
                                                             <button type="submit" class="btn btn-lg btn-success pull-right" name="resize">{% trans "Resize" %}</button>
                                                         {% else %}
diff --git a/instances/views.py b/instances/views.py
index 29a1a1b..a68f52c 100644
--- a/instances/views.py
+++ b/instances/views.py
@@ -186,6 +186,23 @@ def instance(request, compute_id, vname):
                 {'dev': disk['dev'], 'storage': disk['storage'],
                  'image': image, 'format': disk['format']})
         return clone_disk
+    
+    def filesizefstr(size_str):
+        if size_str == '':
+            return 0
+        size_str = size_str.encode('ascii', 'ignore').upper().translate(None, " B")
+        if 'K' == size_str[-1]:
+            return long(float(size_str[:-1]))<<10
+        elif 'M' == size_str[-1]:
+            return long(float(size_str[:-1]))<<20
+        elif 'G' == size_str[-1]:
+            return long(float(size_str[:-1]))<<30
+        elif 'T' == size_str[-1]:
+            return long(float(size_str[:-1]))<<40
+        elif 'P' == size_str[-1]:
+            return long(float(size_str[:-1]))<<50
+        else:
+            return long(float(size_str))
 
     try:
         conn = wvmInstance(compute.hostname,
@@ -340,7 +357,13 @@ def instance(request, compute_id, vname):
                 cur_memory_custom = request.POST.get('cur_memory_custom', '')
                 if cur_memory_custom:
                     cur_memory = cur_memory_custom
-                conn.resize(cur_memory, memory, cur_vcpu, vcpu)
+                disks_new = []
+                for disk in disks:
+                    input_disk_size = filesizefstr(request.POST.get('disk_size_' + disk['dev'], ''))
+                    if input_disk_size > disk['size']+(64<<20):
+                        disk['size_new'] = input_disk_size
+                        disks_new.append(disk) 
+                conn.resize(cur_memory, memory, cur_vcpu, vcpu, disks_new)
                 msg = _("Resize")
                 addlogmsg(request.user.username, instance.name, msg)
                 return HttpResponseRedirect(request.get_full_path() + '#resize')
diff --git a/vrtManager/instance.py b/vrtManager/instance.py
index ceec977..fe003b1 100644
--- a/vrtManager/instance.py
+++ b/vrtManager/instance.py
@@ -524,7 +524,7 @@ class wvmInstance(wvmConnect):
         return util.get_xml_path(self._XMLDesc(VIR_DOMAIN_XML_SECURE),
                                  "/domain/devices/graphics/@keymap") or ''
 
-    def resize(self, cur_memory, memory, cur_vcpu, vcpu):
+    def resize(self, cur_memory, memory, cur_vcpu, vcpu, disks=[]):
         """
         Function change ram and cpu on vds.
         """
@@ -542,6 +542,11 @@ class wvmInstance(wvmConnect):
         set_vcpu.text = vcpu
         set_vcpu.set('current', cur_vcpu)
 
+        for disk in disks:
+            source_dev = disk['path']
+            vol = self.get_volume_by_path(source_dev)
+            vol.resize(disk['size_new'])
+        
         new_xml = ElementTree.tostring(tree)
         self._defineXML(new_xml)