VMS Help  —  EXTRACT  Qualifiers  /BLOCKS
  /BLOCKS[=(option,...)]

   Similar to DUMP/BLOCKS; extracts blocks from the input file(s) without
   interpreting their record structure.

   Up to two of the following options may be specified; if more than one
   is used, separate them with a comma and enclose the list in parentheses.

   START=m   starting block number; the first block in the file is 1.
             A negative value specifies a number of blocks relative
             to the end of the file:  -1 is the last block, -2 is the
             one before that, etc.

   END=n     ending block number; the last block of the file is
             considered to be block number -1.

   COUNT=k   number of blocks to extract.  If START is specified, END
             is derived by adding COUNT-1 to it; if END is specified,
             START is derived by subracting COUNT-1 from it; if neither
             is specified, START is 1 and END is set to COUNT.

   Incompatable with /RECORDS, /HEAD, and /TAIL.  Also incompatable
   with /COLUMNS, /EXPAND_TABS, /TRANSLATE, and /VFC_HEADER.
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