Attaching a Boot Volume

If a boot volume has been detached from the associated instance, you can reattach it to the instance. If you want to restart an instance with a detached boot volume, you must reattach the boot volume using the steps described in this topic.

If a boot volume has been detached from the associated instance, or if the instance is stopped or terminated, you can attach the boot volume to another instance as a data volume. For steps, see Attaching a Volume.

Required IAM Policy

To use Oracle Cloud Infrastructure, you must be given the required type of access in a policy  written by an administrator, whether you're using the Console or the REST API with an SDK, CLI, or other tool. If you try to perform an action and get a message that you don’t have permission or are unauthorized, confirm with your administrator the type of access you've been granted and which compartment  you should work in.

For administrators: The policy in Let users launch Compute instances includes the ability to attach and detach existing block volumes. The policy in Let volume admins manage block volumes, backups, and volume groups lets the specified group do everything with block volumes and backups, but not launch instances.

If you're new to policies, see Getting Started with Policies and Common Policies. For reference material about writing policies for instances, cloud networks, or other Core Services API resources, see Details for the Core Services.

Using the Console

  1. Open the navigation menu. Under Core Infrastructure, go to Compute and click Instances.
  2. Click the instance that you want to reattach the boot volume to.
  3. Under Resources, click Boot Volume.
  4. Click the Actions icon (three dots), and then click Attach Boot Volume. Confirm when prompted.

    You can start the instance when the boot volume's status is Attached.