https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-creating-snapshot.html
Considerations
The following considerations apply to creating snapshots:
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When you create a snapshot for an EBS volume that serves as a root device, you should stop the instance before taking the snapshot.
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You cannot create snapshots from instances for which hibernation is enabled.
- hibernation 옵션이 적용된 EC2는 Memory 상태를 root EBS 볼륨에 저장해주어 다시 Instacne가 start될 때 Memory 상태를 동일하게 올려준다.
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You cannot create snapshots from hibernated instances.
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Although you can take a snapshot of a volume while a previous snapshot of that volume is in the pending status, having multiple pending snapshots of a volume can result in reduced volume performance until the snapshots complete.
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There is a limit of five pending snapshots for a single gp2, io1, or Magnetic volume, and one pending snapshot for a single st1 or sc1 volume. If you receive a ConcurrentSnapshotLimitExceeded error while trying to create multiple concurrent snapshots of the same volume, wait for one or more of the pending snapshots to complete before creating another snapshot of that volume.
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When a snapshot is created from a volume with an AWS Marketplace product code, the product code is propagated to the snapshot.
※ 참고 -Hibernate Your EC2 Instances
https://aws.amazon.com/ko/blogs/aws/new-hibernate-your-ec2-instances/
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