volid — Apollo

MAGTAPE/VOLID -- Automatic volume id generation for labeled tapes     82/03/26


  The RWMT (READ_WRITE_MAGTAPE) and WBAK (WRITE_BACKUP) commands provide
  three ways to generate the volume id for labeled tapes:

      1)  The id may be supplied explicitly with the -VID option.
      2)  It may be generated automatically, as described below.
      3)  If no id is supplied, and if automatic volume id generation
          has not been enabled, then the default volume id of spaces is used.

  To enable automatic volume id generation, create a directory called
  /SYS/TAPE.  In /SYS/TAPE, use the DM editing capabilities to create a
  file called NEXT_VOLUME_ID.  Place a 1-6 character alphanumeric text
  string in this file.  This is the string which will be used as the volume
  id the next time a tape is to be labeled.  When a labeling operation occurs,
  the string is automatically updated by adding 1 to the right-most non-space
  character of the string, and carrying to the left if the character was
  "9" or "Z".
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