You can determine if a particular EBS volume is encrypted or not from either AWS Management console or AWS CLI.
To check the encryption property of an EBS volume from Console, Logon to the AWS Management Console and navigate to EC2 dashboard. Choose Volumes under the ‘Elastic Block Store’ and select the volume. Scroll right to find the ‘Encryption’ field. It says ‘Encrypted’ for a volume that is encrypted and ‘Not Encrypted’ for a volume that is not encrypted.
To determine if a volume is encrypted or not from AWS CLI, use the below command. The command will return ‘True’ if a volume is encrypted and ‘False’ if a volume is not encrypted.
aws ec2 describe-volumes --volume-id volumeid --filters encrypted
