CARTRIDGE -- Cartridge Tape Usage Information                  84/10/26



  A  DOMAIN  network  may  read  and write data residing on cartridge tapes on a
  DN550. Cartridges may be either ANSI  labeled  or  unlabeled,  with  files  of
  ASCII,  EBCDIC,  or  raw  characters.    Cartridge tape supports only 512 byte
  blocks (although smaller may be specified)  and  fixed  length  record  format
  only.  System bootable cartridge tapes are also supported.

  The following general restrictions apply:

     o You  must  perform  the  tape  operations  on  the node to which the
       cartridge drive is attached.

     o Only one drive may be attached to any particular node.

  The following commands are supplied for use with cartridge tapes:

     o WBAK (WRITE_BACKUP) writes one or more object trees to  a  cartridge
       'backup  file'.    Cartridge  tapes written with this program may be
       used  for  backup,  or  to  interchange  files  with  other   DOMAIN
       installations.    Certain  WBAK options are valid only for cartridge
       tapes (-RETEN, -NO_EOT, -SYSBOOT).

     o RBAK (READ_BACKUP) indexes or restores to disk  the  contents  of  a
       backup file written with the WBAK command.

     o RWMT   (READ_WRITE_MAGTAPE)   transfers   files   between  disk  and
       cartridge.  Use  this  command  to  interchange  files  with  other,
       non-DOMAIN installations.

     o EDMTDESC   (EDIT_MAGTAPE_DESCRIPTOR_FILE)   creates   and   modifies
       cartridge descriptor files for use with streams.

     o CPBOOT (COPY_BOOT) may be used to create a bootable cartridge tape.

  Help is available for all of these commands.   Type  'HELP'  followed  by  the
  relevant command name for more information.


RELATED TOPICS

  More information is available.  Type:

  - HELP MAGTAPE VOLID
   for  information  about  RWMT  and  WBAK  support  for  automatic  volume  ID
    generation on labeled magnetic or cartridge tapes.