migrating to new EC2 instance with same volume

1. Launch a new EC2 instance.
2. Stop that EC2 instance.
3. Detach the root volume from the new instance. Make note of the device name that it was attached as (such as /dev/sda1).
4. Detach the root volume from the original instance.
5. Attach the root volume from the original instance to the new instance, using the same device name (such as /dev/sda1).
6. Start your new instance.