FreeBSD/Linux Kernel Cross Reference
sys/Documentation/mkdev.ida

     #!/bin/sh
     # Script to create device nodes for SMART array controllers
     # Usage:
     #       mkdev.ida [num controllers] [num log volumes] [num partitions]
     #
     # With no arguments, the script assumes 1 controller, 16 logical volumes,
     # and 16 partitions/volume, which is adequate for most configurations.
     #
     # If you had 5 controllers and were planning on no more than 4 logical volumes
    # each, using a maximum of 8 partitions per volume, you could say:
    #
    # mkdev.ida 5 4 8
    #
    # Of course, this has no real benefit over "mkdev.ida 5" except that it
    # doesn't create so many device nodes in /dev/ida.
    
    NR_CTLR=${1-1}
    NR_VOL=${2-16}
    NR_PART=${3-16}
    
    if [ ! -d /dev/ida ]; then
            mkdir -p /dev/ida
    fi
    
    C=0; while [ $C -lt $NR_CTLR ]; do
            MAJ=`expr $C + 72`
            D=0; while [ $D -lt $NR_VOL ]; do
                    P=0; while [ $P -lt $NR_PART ]; do
                            MIN=`expr $D \* 16 + $P`
                            if [ $P -eq 0 ]; then
                                    mknod /dev/ida/c${C}d${D} b $MAJ $MIN
                            else
                                    mknod /dev/ida/c${C}d${D}p${P} b $MAJ $MIN
                            fi
                            P=`expr $P + 1`
                    done
                    D=`expr $D + 1`
            done
            C=`expr $C + 1`
    done

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