Sysstat

add alias sar='LANG=C sar' to bashrc for better sorting of date
#yum install sysstat -y

add disk stats to collecter

#vim /usr/lib/sa/sa1

        exec ${ENDIR}/sadc -d -F -L 1 1 -
else
        exec ${ENDIR}/sadc -d -F -L $* -

run 3 times to get results

#/usr/lib/sa/sa1
#/usr/lib/sa/sa1
#/usr/lib/sa/sa1

shows device names with p option
#sar -dp