# create and mount instance−store disks as raid0(c3.large) if [ ! -b /dev/md0 -a -b /dev/xvdb -a -b /dev/xvdc ] then umount /dev/xvd[bc] yes | mdadm --create /dev/md0 --level=0 -c256 --raid-devices=2 /dev/xvd[bc] echo DEVICE /dev/xvdb /dev/xvdc > /etc/mdadm.conf mdadm --detail --scan >> /etc/mdadm.conf sfdisk /dev/md0 <<EOT # partition table of /dev/md0 unit: sectors /dev/md0p1 : start= 1024, size