DD를 이용한 disk 성능 테스트

### dd_test.sh ###

#!/usr/bin/ksh

if [[ $# -ne 2 ]]

then

echo "Usage: dd_test.sh [num_of_iteration] [block_size]"

              echo "         ex. dd_test.sh 10000 512K                "

   exit

fi

i=1

while [ $i -le $1 ]

do

dd if=/dev/rhdisk19 of=/dev/null bs=$2 &

dd if=/dev/rhdisk20 of=/dev/null bs=$2 &

dd if=/dev/rhdisk21 of=/dev/null bs=$2 &

dd if=/dev/rhdisk22 of=/dev/null bs=$2 &

dd if=/dev/rhdisk23 of=/dev/null bs=$2 &

dd if=/dev/rhdisk24 of=/dev/null bs=$2 &

dd if=/dev/rhdisk25 of=/dev/null bs=$2 &

dd if=/dev/rhdisk26 of=/dev/null bs=$2 &

dd if=/dev/rhdisk27 of=/dev/null bs=$2 &

dd if=/dev/rhdisk28 of=/dev/null bs=$2 &

    ((i=i+1))

done