docs: def add_metadata_sectors(self, vtoc, sector_list, header):
          """Add track/sector list
          """
          tslist = BaseSectorList(header)
          for start in range(0, len(sector_list), header.ts_pairs):
              end = min(start + header.ts_pairs, len(sector_list))
              if _xd: log.debug("ts: %d-%d" % (start, end))
              s = Dos33TSSector(header, sector_list, start, end)
              s.ts_start, s.ts_end = start, end
              tslist.append(s)
          self.num_tslists = len(tslist)
          vtoc.assign_sector_numbers(self, tslist)
          sector_list.extend(tslist)
          self.track, self.sector = header.track_from_sector(tslist[0].sector_num)
          if _xd: log.debug("track/sector lists:\n%s" % str(tslist))