For servers: make a full back-up before, and create emergency repair disks after, each update

With full back-ups available, you can react calmly when faced with concerns about an update, and re-establish a functioning server as quickly and efficiently as possible.

Ensure roll-back capability during updates of shared resources such as servers (rollback scenario). Provide a tested and robust procedure for rolling back to a previous configuration in order to reduce the potential negative impact of an update.