taccess(1)                 DG/UX 4.30                  taccess(1)



     NAME
          taccess - initiate access to labeled tape

     SYNOPSIS
          taccess [ -a ADN ] [ -d density ] [ -f length ] [ -l
          IBM|ANSI|UN ] [ -p pseudo ] -v vsnlist

     DESCRIPTION
          Taccess must be used before any other REELexchange commands
          can be used.  It initializes access to the specific tapeset
          and tape drive.  Through it, the user identifies the tapeset
          and its characteristics: density, length, tape format.
          Also, the user specifies the Volume Serial Number(s) (VSNs)
          for the tape volume(s) in the tapeset.  If a multi-volume
          tapeset is being processed, then the full list of VSNs must
          be named.

          The taccess command also implicitly performs the equivalent
          of tposn -r -n1 (i.e. It positions the tape to read the
          first file).

     OPTIONS
          -a ADN
               "Tape Drive." Specifies which tape drive to use.  The
               name specified should be one of the ADN files from the
               /var/reelexchange/adn directory.  If this option is not
               specified, the tape drive named in the file
               /var/reelexchange/default.adn will be used.

          -d density
               "Density." The density in bpi of the tape.  Common
               values are 1600, 3200, and 6250.  The density specified
               here should match the density field in the ADN file of
               the tape drive that is being accessed.  Default density
               is 1600.

          -f length
               "Length." The length of the tape in feet less 100 feet
               error margin.  Common values are 700, 1100 and 2300.
               Default length is 1400.

          -l   "Format." Specifies the format of the tape - either
               IBM, ANSI, or UN for unlabeled tapes.  Default format
               is ANSI.

          -p pseudo
               "Tapesetname." Defines an arbitrary alphanumeric name
               by which the tapeset is referenced during the current
               session.  By default, REELexchange calls each tape
               default.

          -v vsnlist



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     taccess(1)                 DG/UX 4.30                  taccess(1)



               "Tapeset." vsnlist is a comma separated list of VSNs.
               This list should be the order of tapes in the tapeset
               if the current tape being introduced by taccess is part
               of a multivolume tapeset.

     FILES
          /var/reelexchange/default.adn File containing name of
                                        default tape drive.
          /var/reelexchange/tapecap     File containing descriptive
                                        entries for all tape drives
                                        supported by REELexchange.
          /var/reelexchange/Adn/*       Each file in this directory
                                        describes a tape drive on the
                                        system.  The name of one of
                                        these files is given with the
                                        -a option to specify a
                                        particular tape drive for I/O.
          /var/reelexchange/d_ibm       IBM label defaults.
          /var/reelexchange/d_ansi      ANSI label defaults.

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
































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