I want to mirror our PowerEdge 1800 Windows Small Business Server 2003.  Can someone tell me if I need to purchase an operating system or other software for the "mirror", or will the original server "build" everything to the new redundant server?  Is there existing software on my current server to do this automatically, or how do I set up the source server to mirror itself to the new server.  Do the two servers need to be located close to one another, or physically connected to one another, or is a network connection all that is needed?  Thanks for any help you can give.