rtc(7)                              CLIX                              rtc(7)



  NAME

    rtc - Describes remote tape control STREAMS driver

  DESCRIPTION

    rtc allows access to a tape drive on another machine as if it resided
    locally.  Functionally, it looks the same as a local tape device.

    There are three special files for every rtc tape unit: a rewind device, a
    no-rewind device, and a control device.  The rewind device and the no-
    rewind device behave exactly like a normal tape device.  The control
    device is used to set up or close the connection to the remote machine.

    Because allocating a tape drive on another machine may prevent its use by
    another process, a timeout is set at the end of each access.  If the
    timeout expires, a warning is displayed on the console.  If the tape
    device is accessed within the next two minutes, the timeout is restarted.
    Otherwise, the connection is closed.

  FILES

    /dev/rmt/rt?
           Rewind tape device

    /dev/rmt/rt?n
           No-rewind tape device

    /dev/rmt/rt?.ctl
           Control device

  CAUTIONS

    Some older rtc_s servers support only 10K bytes (20 blocks) of data in a
    single read or write operation.  The rtc control device needs to remain
    open while the tape drive is allocated.  If the control device is closed,
    the connection to the machine with the tape drive will be automatically
    closed.

  RELATED INFORMATION

    Commands: rtc(1), rtc_s(8)

    Functions:rtc_allocate(3)

    Files:tc(7)








  2/94 - Intergraph Corporation                                              1