A virtual server set up with no back up virtual server to switch over to almost instantly sort of takes away a lot of the benefits of the system. You will still get more effiecient usage of the server - however you won't get any of the back up improvements that are a major part of selling this stuff.
I think - if my memory serves me correctly.
Yes thats pretty much correct, however if all your virtual servers are hosted on one server, or more likely all the file systems for VS images are, then a hardware or in this case a software problem will take down everything.
Most "cloud" solutions will ensure th e network file storage is fully redundant.
I once worked for a web host who were taken over by another web host, who bragged about how good their £70k investment (I think) in an (unredundant) EMC storage solution was. Until it started locking up of course, and took the entire business down, including helpdesk.
This post has been edited by John Steed: 31 October 2011 - 11:57 AM