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Getting Started with Compute: Understand Amazon EC2 Instance Store Volumes

By: Author Alex Lim

Posted on

Categories Cloud Computing

Learn the key characteristics of Amazon EC2 instance store volumes, including data retention, encryption, and usage as root volumes. Prepare for AWS certification exams.

Table of Contents

Question

Which of the following statements are true about Amazon EC2 instance store volumes? (Select TWO.)

A. The volumes can act as a root volume.
B. The volumes can be encrypted.
C. The volumes can be rebooted and still retain data on the volume.
D. The volumes can be stopped and still retain data on the volume.
E. The volumes can be retained ater the instance is terminated.

Answer

A. The volumes can act as a root volume.
C. The volumes can be rebooted and still retain data on the volume.

Explanation

Instance store volumes cannot be encrypted. If they are stopped or terminated, then the user will lose all of their data. The user can use an instance store volume as a root volume, and it can be rebooted without losing data.

Amazon EC2 instance store volumes have the following characteristics:

  1. They can be used as root volumes for an EC2 instance. This means the operating system can be installed on an instance store volume.
  2. Instance store volumes cannot be encrypted. If data encryption is required, you should use EBS volumes instead which support encryption.
  3. The data on instance store volumes persists when the EC2 instance is rebooted. As long as the instance is not stopped or terminated, the data remains on the volume.
  4. However, if the instance is stopped (without using Stop-Hibernate) or terminated, any data on the instance store volume is lost. The data does not persist beyond the lifetime of the instance.
  5. When an EC2 instance using instance store volumes is terminated, the volumes are also deleted. There is no way to retain the instance store volumes after instance termination.

In summary, instance store volumes can be used as root devices and maintain data when rebooted, but any data is lost if the instance is stopped or terminated, the volumes cannot be encrypted, and the volumes are deleted when the instance is terminated.

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