check_iostat

#!/bin/sh
basename=`basename $0`
print_help(){
    printf "$basename -d device\n \n"

    printf " -d\t Device to check (e.g. /dev/sda) \n"
    printf "\n"
exit 0
}

args=`getopt --long -o "i:d:h" "$@"`
eval set -- "$args"
while true; do
    case "$1" in
        -d)
            DEVICE=$2
            shift 2
            ;;
	-h)
	    print_help
	    ;;
        *)
            break
            ;;
    esac
done


if [ -z "$DEVICE" ]; then
    echo "You need to specify at least the device"
    exit 3
fi

OUTPUT=`iostat -x -d $DEVICE | tail -n2 | head -n1`

RS=`echo $OUTPUT | awk '{print $4}'`
WS=`echo $OUTPUT | awk '{print $5}'`
IOREAD=`echo $OUTPUT | awk '{print $6}'`
IOWRITE=`echo $OUTPUT | awk '{print $7}'`
IOWAIT=`echo $OUTPUT | awk '{print $10}'`
UTILISATION=`echo $OUTPUT | awk '{print $14}'`

if [ -z "$IOWRITE" ] || [ -z "$IOREAD" ]; then
    echo "Failed to get a value for $DEVICE"
    exit 3
fi

echo "IO for $DEVICE -- Read: $IOREAD kB/s // Write: $IOWRITE kB/s // Wait: $IOWAIT ms // Reads/s $RS // Writes/s $WS // Utilisation $UTILISATION % | \
kbs_read=${IOREAD}KB \
kbs_write=${IOWRITE} \
ms_wait=${IOWAIT}ms  \
utilisation=${UTILISATION}% \
rs=${RS} \
ws=${WS}"
exit 0