Create Soft Raid On RedHat Linux

 

#!/bin/sh
#
#Author:jacky.lee
#date:2010/4/17
#This scripts create soft raid 0,1,5,6,10
#The test platform on redhat linux.
#define main function
main () {
    clear
    echo '          ------------------------------------------------------          '
    echo '          1.Create a software raid array          '
    echo '          2.View raid array sync status           '
    echo '          3.View raid array detail            '
    echo '          4.Create mdadm.conf file            '
    echo '          5.Add hotspare device on raid array     '
    echo '          6.Replace a fault device on raid array      '
    echo '          7.Delete a software raid array          '
    echo '          8.Renaming a raid array             '
    echo '          9.Resync raid array             '
    echo '          q,exit                      '
    echo '          ------------------------------------------------------          '
    while true
        do
        echo -n "   Please choice [1-q]:"
        read choice
        case $choice in
            1)
            create_raid
            sleep 10
            clear
            main
            ;;
            2)
            view_sync
            clear
            main
            ;;
            3)
            view_detail
            sleep 10
            clear
            main
            ;;
            4)
            create_configure_file
            sleep 3
            clear
            main
            ;;
            5)
            add_hot
            sleep 10
            clear
            main
            ;;
            6)
            view_detail
            sleep 5
            rep_dev
            clear
            main
            ;;
            7)
            del_rd
            clear
            main
            ;;
            8)
            ren_rd
            view_detail
            sleep 5
            clear
            main
            ;;
            9)
            res_rd
            clear
            view_sync
            clear
            main
            ;;
            q)
            exit
            ;;
        esac
        done
}

#create raid
create_raid (){
    if [ -e /sbin/mdadm ]&&[ -x /sbin/mdadm ];then
        echo
        echo "Please input the name:[like:md0,md1....]"
        read name
        echo
        echo "which level do you want to create it?[0,1,5,6]"
        echo "The level 0 and 1 at least 2 device,The level 5 at least 3 device,level 6 at least 4."
        read level
        echo
        echo "How many device for use?"
        read num
        echo "The device name like:/dev/sda,/dev/sda1,/dev/sd[abcd],/dev/sd[abcd]1"
        echo "Please input the device name:"
        read input
        mdadm -C /dev/$name -l$level -n$num $input
    fi
    }

#view sync status
view_sync () {
    if [ -e /proc/mdstat ]&&[ -r /proc/mdstat ];then
        watch -n .2  'cat /proc/mdstat'
    fi
    }

#view detail of md information
view_detail () {
    if [ -e /sbin/mdadm ]&&[ -x /sbin/mdadm ];then
        echo "which md device you want to view detail:"
        read input
        if [ $input=`grep $input /proc/mdstat |awk '{print $1}'` ];then
            mdadm --detail /dev/$input
        else
            sleep 5
        fi
    fi
    }

#create mdadm configure file
create_configure_file () {
    if [ -e /sbin/mdadm ]&&[ -x /sbin/mdadm ];then
        echo "The mdadm.conf file default location is /etc."
        mdadm --examine --scan >/etc/mdadm.conf
        echo "The mdadm.conf file content by follow:"
            cat /etc/mdadm.conf
    fi
    }

#add hotspare device
add_hot () {
    if [ -e /sbin/mdadm ]&&[ -x /sbin/mdadm ];then
        echo "which md do you for add a hotspare device?"
        read name
        echo "which device you want set a hotspare?"
        read device
        mdadm /dev/$name -a $device
        mdadm --detail /dev/$name
    fi
    }

#remove a fault device
rep_dev () {
    if [ -e /sbin/mdadm ]&&[ -x /sbin/mdadm ];then
        echo "Which device you want to remove?"
        read device1
        echo "Which device you want to add?"
        read device2
        mdadm -r $device1 -a $device2
    fi
    }


#delete a raid
del_rd () {
    echo "First,stop all I/O access on md devices."
    if [ -e /sbin/mdadm ]&&[ -x /sbin/mdadm ];then
        echo "Which md do you want to delete?"
        read md
        mdadm -S /dev/$md
        echo "Please input the device name:"
        read name
        mdadm --misc --zero-superblock $name
    fi
    }
#renaming a raid array
ren_rd () {
    echo "First,you must stop the raid array!"
    if [ -e /sbin/mdadm ]&&[ -x /sbin/mdadm ];then
        echo "Which md do you want stop?"
        read md
        mdadm -S /dev/$md
        echo "What's the new md name?"
        read name
        echo "What's the device name on the old md?"
        read device
        mdadm --assemble /dev/$name  --super-minor=0 --update=super-minor $device
    fi
    }

#resync a raid array
res_rd  () {
    echo "Which raid array need resync?"
    read input
    if [ -e /sys/block/$input/md/sync_action ]&&[ -f /sys/block/$input/md/sync_action ];then
    echo check >/sys/block/$input/md/sync_action
    fi
    }
#Calling main function
main