Immediate hpHosts server downtime

Just a note folks, the hpHosts server is making some very strange noises (typical, get 2 servers re-built and another decides it wants to be a problem), and doesn't sound too well, so I'm going to take it offline with immediate effect, to take a look and see what the problem is.I'm not expecting the downtime to be more than 30-45 mins or so.