cird(7)                    DG/UX 4.30                     cird(7)



     NAME
          cird - AViiON family disk subsystem

     DESCRIPTION
          The cird disk subsystem family consists of the set of VME-
          based disk controllers which support the following units:

          Model #    Size
          ESDI 6442  327 Mbyte full-height non-removable disk
          ESDI 6661  327 Mbyte half-height non-removable disk
          ESDI 6555  648 Mbyte full-height non-removable disk
          SMD  6541  1066 Mbyte non-removable disk
          SMD  6542  1066 Mbyte non-removable disks (package of two)

          A physical disk unit may be accessed directly via the
          special file nodes in /dev/pdsk and /dev/rpdsk.  These nodes
          are named in the form:

          /dev/[r]pdsk/cird@<n>(<addr>,<m>)

          where <n> is the hexadecimal device code of the controller,
          <addr> is the control space starting address for the
          controller, and <m> is the unit on the controller.  The
          nodes in /dev/pdsk provide access as a block special device
          as described in dsk(7).  The nodes in /dev/rpdsk provide
          access as a character special device as described in
          rdsk(7).  When accessing a disk through a /dev/pdsk  or
          /dev/rpdsk node, the operating system performs no bad block
          remapping.

     FILES
          /dev/pdsk/*

          /dev/rpdsk/*

     SEE ALSO
          cird(7), dsk(7), rdsk(7).


















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