How to Take a Backup of an EBS Volume

Answer - C.

The AWS Documentation mentions the following:

You can back up the data on your Amazon EBS volumes to Amazon S3 by taking point-in-time snapshots.

For more information on EBS Snapshots, please visit the link:

To take a backup of an Amazon Elastic Block Store (EBS) volume, the recommended approach is to create an EBS snapshot. An EBS snapshot is a point-in-time copy of an EBS volume that is stored in Amazon S3. The snapshot contains all the data on the volume at the time the snapshot was created, and can be used to restore the volume or create a new volume with the same data as the original.

The steps to create an EBS snapshot are as follows:

1. Open the Amazon EC2 console.
2. In the navigation pane, choose "Volumes".
3. Select the EBS volume that you want to back up.
4. Choose "Actions", then choose "Create Snapshot".
5. In the "Create Snapshot" dialog box, enter a name and description for the snapshot.
6. Choose "Create Snapshot".

Note that creating a snapshot is an asynchronous process, and the snapshot may take several minutes or longer to complete. You can monitor the progress of the snapshot creation in the "Snapshots" section of the Amazon EC2 console.

Once the snapshot is complete, you can use it to create a new EBS volume with the same data as the original, or restore the original volume to a previous state by creating a new volume from the snapshot and attaching it to an Amazon EC2 instance.

Option A, storing the EBS volume in S3, is not a recommended approach for taking a backup of an EBS volume. While it is possible to create an S3 bucket and manually upload a copy of the EBS volume to the bucket, this approach does not provide the same level of data consistency and recovery options as creating an EBS snapshot.

Option B, storing the EBS volume in an RDS database, is not applicable as RDS is a managed relational database service offered by AWS, and does not support storing EBS volumes.

Option D, storing the EBS volume in DynamoDB, is also not applicable. DynamoDB is a managed NoSQL database service offered by AWS, and does not support storing EBS volumes.