docs: def get_sector_slice(self, start, end=None):
          """ Get contiguous sectors
          
          :param start: first sector number to read (note: numbering starts from 1)
          :param end: last sector number to read
          :returns: bytes
          """
          pos, size = self.header.get_pos(start)
          if end is None:
              end = start
          while start < end:
              start += 1
              _, more = self.header.get_pos(start)
              size += more
          return slice(pos, pos + size)