Hi Chaps, This is certainly a very interesting discussion. I've managed to convince management that Guaranteed 100% uptime really isn't a possibility, and I've explained that the considerable costs associated with any clustering/cloning solution would make the marginal increase in reliability not worth the investment. I am instead going to ensure that spare hardware is on-site in case of an incident such as last week's. So they're happy, for the moment anyway.... But the discussion has piqued my interest. Regarding the duplication software: The marketing blurb sounds very impressive, but I would like to hear if anyone that has actually used any of these on a system that did actually fail. How did it perform compared to a similar scenario involving a cluster? Personally, if I was to implement anything like this in the future, I would prefer to use a native MS (clustering) - rather than third party solution (duplication). It would be interesting to hear first hand accounts. Cheers, Jason