"Disk Encryption" is not documented as a required step, for deploying MC on AWS.
Deploying MC on AWS with the AWS disk encryption mechanism is not required.
Note that "Disk Encryption" is not documented as a required step, for deploying MC on AWS. See the recommended steps below, and there isn't any part for "Disk Encrypted".
Complete the following tasks to install and perform the initial Management Center configuration:
The disk setup is done differently, and as shown in the second Tech. Doc., above.
"Disk Encryption" is a possible step, for deploying MC on Microsoft Azure. See step 2, below.
So, deploying MC on AWS without the AWS disk encryption mechanism is correct.