blockDeviceMappings

The block device mappings.

When using the CreateImage action:

• You can't change the volume size using the VolumeSize parameter. If you want a different volume size, you must first change the volume size of the source instance.

• You can't modify the encryption status of existing volumes or snapshots. To create an AMI with volumes or snapshots that have a different encryption status (for example, where the source volume and snapshots are unencrypted, and you want to create an AMI with encrypted volumes or snapshots), copy the image instead.

• The only option that can be changed for existing mappings or snapshots is DeleteOnTermination.