mount the disk at os level if you created a new disk
use following commands
format and create a disk of type : /dev/xvdf
sudo mkfs -t ext4 /dev/xvdf
then
mount it, /u01 is the mount point
sudo mount /dev/xvdf /u01
open the following file as the root user
/etc/fstab
add the following line to the end of the file
/dev/xvdf /u01 ext4 defaults 0 0
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-using-volumes.html#using-ebs-volume-linux