'Adjust space size to next legal value because of redundancy.'

def _adjust_size_g(self, size_g):

    count = (len(self._make_server_list()) // 2)
    if (size_g % count):
        size_g = int((size_g + count))
        size_g -= (size_g % count)
    return int(math.ceil(size_g))
