Changing EC2 Instance Security Groups

After updating grub2 and rebooting, my server does not boot: Booting from Hard Disk 0...…

source: http://stackoverflow.com/questions/11535617/add-ebs-to-ubuntu-ec2-instance additional info: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-creating-volume.html Since this is a new volume, you need to format…