1.EXCHANGE> MOUNT MT:
      %EXCHANGE-I-MOUNTED, MATH06 mounted on _MTA0:

      The command in this example requests that the magnetic tape
      loaded on the device MTA0 be mounted as a foreign volume. The
      tape label is displayed, since the tape has been previously
      initialized as an ANSI-labeled tape with the label MATH06.
      This tape cannot be accessed as a Files-11 tape; it should
      be reinitialized as a DOS-11 tape during the current EXCHANGE
      session.

    2.EXCHANGE> MOUNT DMA1:
      %EXCHANGE-I-WRITELOCK, volume is write-locked
      %EXCHANGE-S-MOUNTED, volume DMA1: mounted

      The command in this example mounts the foreign volume that is
      loaded in the RK07 device DMA1, making the volume available
      for subsequent EXCHANGE commands. EXCHANGE recognizes that the
      volume itself is write-locked, and displays a message.