The server must be stopped in order to back up or restore its system volume, so a separate server is required for backup operations.
That is, at least two servers are required for this operation.
A configuration example for backup and restoration of a system volume is shown below.
Point
If the backup source server and the server used for backup operations have different operating systems, refer to "13.1.1.19 Notes on executing copy between different operating systems" in "13.1.1 General notes".