/sys$common/syshlp/helplib.hlb MERGE, Output File Qualifiers, /ALLOCATION, Example  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  $ SORT/KEY=(POS:1,SIZ:80) STATS.DAT -
  _$ SUMMARY.LIS/ALLOCATION=1000/CONTIGUOUS

      This SORT command allocates 1000 contiguous blocks for the
      output file SUMMARY.LIS.