EVS Snapshots

You can create snapshots to save the disk data at specified time points. These snapshots can be used for data disaster recovery.

If data is lost, you can roll back the disk data to the state when a snapshot was created.
You can use snapshots to create new disks so that the new disks will contain the snapshot data once being created.

What are the differences between snapshots and backups?

Item	Storage	Data Synchronization	DR Range	Service Recovery
Backup	Backups are stored in OBS, instead of disks. This ensures data restoration upon disk damage or corruption.	A backup is a copy of a disk taken at a given time and is stored in a different location. Automatic backup can be performed based on backup policies. Deleting a disk will not delete its backups.	A backup and its source disk reside in different AZs. Cloud server backups support cross-region replication.	You can restore backups to their original disks or create new disks from the backups.
Snapshot	Snapshots are stored on the same disk as the original data.	A snapshot is the state of a disk at a specific point in time, and automatic snapshots are not supported. If the disk is deleted, all its snapshots will also be deleted.	A snapshot and its source disk reside in the same AZ.	You can restore snapshots to their original disks or create new disks from the snapshots.