def record(self):
        # type: () -> bytes
        '''
        A method to generate the string representing this UDF Anchor Volume
        Structure.

        Parameters:
         None.
        Returns:
         A string representing this UDF Anchor Volume Structure.
        '''
        if not self._initialized:
            raise pycdlibexception.PyCdlibInternalError('UDF Anchor Volume Descriptor not initialized')

        rec = struct.pack(self.FMT, b'\x00' * 16, self.main_vd_length,
                          self.main_vd_extent, self.reserve_vd_length,
                          self.reserve_vd_extent)[16:] + b'\x00' * 480

        return self.desc_tag.record(rec) + rec
A method to generate the string representing this UDF Anchor Volume
        Structure.

        Parameters:
         None.
        Returns:
         A string representing this UDF Anchor Volume Structure.