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It also might be more likely to use a FibreChannel-based SAN where this sort of thing is expected. And there are SCSI-to-SAN adapters out there if you had some existing SCSI storage you wanted to use. This is a much more expensive option, but less hacky.


And much, much easier to scale past two machines. Direct Attached SCSI clustering is almost always just two nodes, though there are a =few= disk arrays that can support more SCSI connections.

FibreChannel is actually much more like a network protocol than a peripheral bus. And so it's much easier to do >2 node clusters with it, you have devices that are exactly like ethernet switches and hubs for FC connections. Once again though, you want hardware redundancy on these devices also. (hence the multiple GAB/LLT interfaces in a VCS configuration, each would connect to a seperate switch.)