iozone -a -s 32g -i 0 -i 1 -i 2 -f /home/data -y 16M -Rb /root/32g-iozone.xls
iozone -a -s 64g -i 0 -i 1 -i 2 -f /home/data -y 16M -Rb /root/64g-iozone.xls
iozone -a -s 128g -i 0 -i 1 -i 2 -f /home/data -y 16M -Rb /root/128g-iozone.xls