docs: def _get_storage_resource(self):
          """Gets the SmartStorage resource if exists.
  
          :raises: IloCommandNotSupportedError if the resource SmartStorage
              doesn't exist.
          :returns the tuple of SmartStorage URI, Headers and settings.
          """
          system = self._get_host_details()
          if ('links' in system['Oem']['Hp'] and
                  'SmartStorage' in system['Oem']['Hp']['links']):
              # Get the SmartStorage URI and Settings
              storage_uri = system['Oem']['Hp']['links']['SmartStorage']['href']
              status, headers, storage_settings = self._rest_get(storage_uri)
  
              if status >= 300:
                  msg = self._get_extended_error(storage_settings)
                  raise exception.IloError(msg)
  
              return headers, storage_uri, storage_settings
          else:
              msg = ('"links/SmartStorage" section in ComputerSystem/Oem/Hp'
                     ' does not exist')
              raise exception.IloCommandNotSupportedError(msg)