Sorry Paul, I had to do this....

I'm talking about geoclustering: building clusters of servers that are in physically separate locations. For example, a company in a metropolitan area such as Detroit could run Exchange Server on a cluster, placing one cluster server at headquarters in Dearborn and another at a factory in Melvindale. The company could connect both servers to a storage unit at a facility somewhere else in the area.
The article goes on to describe the technologies required in order to implement such a physically disconnected clustering model for Windows 2003 and Exchange.  Summary: It ain't pretty, folks.
The bottom line is optic fiber.
OK, so let me get this straight.  In order to have a true shared-nothing, "hot site" disaster recovery architecture for Exchange, we're talking about running fiber?  I'll bet it would be a whole lot cheaper to just migrate that Exchange environment to Domino Enterprise servers, use the software-layer clustering, that can even run on different versions of the product and operating platforms, and call it a day.  One customer I've worked with in New England measures their Domino availability at 99.9999% (I am sure there are more such stories).  There's no fiber involved, just solid software architecture.
Link: Exchange & Outlook update: Geoclustering Exchange >

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