Test DD for Linux (Mint)

gistfile1.txt

#!/bin/sh
COUNT=2048

echo "testing pseudo-IO performances - 1st Pass"
dd if=/dev/zero of=/dev/null bs=1M count=$COUNT

echo "testing IO write performances - 1st Pass"
dd if=/dev/zero of=PERFTEST bs=1M count=$COUNT

echo "testing IO read performances - 1st Pass"
dd if=PERFTEST of=/dev/null bs=1M count=$COUNT

echo "testing IO read performances - 2nd Pass"
dd if=PERFTEST of=/dev/null bs=1M count=$COUNT

echo "testing IO write performances - 2nd Pass"
dd if=/dev/zero of=PERFTEST bs=1M count=$COUNT