When an EC2 instance is launched from an AMI, the root device volume contains the image used to boot the instance—mainly the operating system, all the configured services, and applications. This volume can be backed by either EBS or Instance Store (both are explained in the following sections) and can be configured when the AMI is created.

The Vector AMI is backed by EBS. This means that when you launch an EC2 instance from the Vector AMI, you will have at least one EBS volume attached to the instance, which will be the root volume. It will contain the operating system, a configured and ready-to-use Vector installation, sample data, and the sample database.

You will see this root volume when you launch the instance. It will have a size of 150 GB.