Fix detect LVM

install/variables/disk.py

@@ -708,7 +708,10 @@ class VariableOsLocationSource(LocationHelper,DeviceHelper,Variable):
         # check wrong dev
         ###########################
         disks = filter(lambda x:x.startswith('/dev/'),value)
-        wrongDevices = list(set(disks) - \
+        # get original /dev names
+        cnDisks = map(lambda x:getUdevDeviceInfo(name=x).get('DEVNAME',x),
+                  disks)
+        wrongDevices = list(set(cnDisks) - \
                     set(self.fixOsDiskDev()))
         if wrongDevices:
             raise VariableError(_("Wrong device '%s'")%wrongDevices[0])