What Is a System Snapshot
A virtual server with the HDD+SSD disk system enables you to take a so-called snapshot of the server before making radical changes. Later, in case of a failure, you will be able to roll back all the changes to the status of the server for the moment when you took the snapshot. You can store 2 snapshots for one server at the same time.
You can take snapshots with the VMmanager control panel. Note that storing several snapshots on one virtual server can significantly affect its performance.