wmt(7)                           DG/UX R4.11                          wmt(7)


NAME
       wmt - pseudo WORM (Write Once Read Multiple optical device) as
       magtape interface

DESCRIPTION
       This character special device provides indirect access to files on a
       WORM.  The interface conforms to the semantics followed by character
       special tape (rmt).  Use the open(2) system call to open any of the
       /dev/wmt/* special files and perform I/O on them as if they were
       magnetic tape devices.

       The wmt server (daemon) wmtd(1M) provides the mapping between pseudo
       tape device and the physical WORM device.  Arguments passed to the
       wmt server on startup define the mapping.

       To create the wmt special files, the device driver entry wmt() must
       be listed in the system(4) file before configuring the system.
       Configuration variables exist in the master(4) file dgux and in the
       system(4) file to control the number of wmt special files created.

       The wmtd(1M) server must be running for any of the wmt special files
       to be successfully opened.

FILES
       /dev/wmt/*        Tape device names for character special access.
       /etc/master.d/dgux   Main DG/UX master file.

SEE ALSO
       config(1M), wmtd(1M), ioctl(2), open(2), master(4), system(4),
       rmt(7).


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