tposn(1)                   DG/UX 4.30                    tposn(1)



     NAME
          tposn - position tape to specified file

     SYNOPSIS
          tposn [-n num ] [-p pseudo ] {-r | -w }

     DESCRIPTION
          tposn moves the tape to be correctly positioned for either a
          subsequent read ( tread ) or write ( twrite ).  Read and
          write start at different positions for a file, so the
          position must be made specifically for the planned
          operation.  With the -r option, tposn positions for a read.
          The -w option positions for a subsequent write.

          tposn resets file labels.  If positioning for a write, tposn
          resets the current file labels to default values.

          Tape mount and unmount prompts are generated as needed to
          traverse the volumes that make up the tapeset.

     OPTIONS
          -n num
               "File Number." Specifies a file by its absolute order
               position from the beginning of the tapeset.  num is a
               positive integer.

          -p pseudo
               "Tapesetname." Tapeset pseudo name as specified by the
               preceding taccess command which initiated access to the
               tapeset. By default, REELexchange calls each tape
               default.PP .

          -r   "Read." Position for subsequent read.

          -w   "Write." Position for subsequent write.

     SEE ALSO
          reelexchange_intro(1), taccess(1), tdisplay(1), tkey(1),
          tlabel(1), tread(1), trelease(1), tsniff(1), twrite(1).
















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