Medieval Realms is not an official Rising Worlds server and as such we can’t guarantee up-time (MR is a community donated sever). That said, our server aims to be open to the community 24/7. Operating System updates do come along and they will be installed as and when they are needed – they usually require a server restart! We normally find this a good time to restart our routers too. So downtime can be as long as half an hour.
We understand that your (and ours!) in-game creations are important, knowing that we do our utmost to protect them. Rest assured Medieval Realms is backed up on a regular basis!