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How to increase the size of the root device for a running EBS-backed instance


  1. Get the ID of the Amazon EBS volume and the Availability Zone of a running instance for which you want to increase the root storage size.
  2. Stop the instance.
  3. Detach the original volume from the instance.
  4. Create a snapshot of the detached volume.
  5. Create a new volume from the snapshot by specifying a larger size.
  6. Attach the new volume to the stopped instance.
  7. Start the instance and get the new IP address/hostname.
  8. Connect to the instance using the new IP address/hostname.
  9. Resize the root file system to the extent of the new Amazon EBS volume.
  10. Check the size of the root device. The root device now shows the increased size.
  11. (Optional) Delete the old Amazon EBS volume, if you no longer need it.
The following are the tasks for creating a snapshot of the root device of an instance store-backed instance.

The snapshot is created using an Amazon EBS volume. We can use this snapshot to create a new EBS-backed AMI or to launch another instance.
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