tposn(1)                         DG/UX R4.11                        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.

       -r     "Read." Position for subsequent read.

       -w     "Write." Position for subsequent write.

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


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