cimd(7)                          DG/UX 5.4.2                         cimd(7)


NAME
       cimd - AViiON family disk subsystem

DESCRIPTION
       A cimd disk subsystem consists of a VME-based disk controller with up
       to 4 physical SMD (Storage Module Device) units on that controller.
       The units supported are as follows:

       Model #  Size
       6541     1066 Mbyte non-removable disk
       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/cimd@device-code(addr,m)

       where device-code 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 cimd subsystem has 4 built-in defaults for the device code and
       control space starting address of the cimd device specification.
       When using the defaults, a short form of the cimd device
       specification can be used:

           cimd(controller number)

       where controller number is the hexadecimal number of the controller
       in the system.  For example, the first cimd controller is cimd(0),
       the second is cimd(1), etc.

           Controller #    Device Code/VME Address

           cimd(0)         0x18/0xFFFFEF00
           cimd(1)         0x19/0xFFFFF100
           cimd(2)         0x1A/0xFFFFFB00
           cimd(3)         0x1B/0xFFFFFD00

       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), cied(7), dsk(7), rdsk(7).




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