That being said, the better question is: should you go with two large fabrics or many smaller SAN islands? The...
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answer may very well be a combination in which you use a SAN router like those from Brocade, Cisco and McData to physically connect the SAN islands yet logically isolate them as separate SAN segments and fabrics. Regardless, whether you choose to go with a large fabric or many small SAN islands implemented with redundancy, maintain some level of redundancy and isolation. Balance the perceived management benefit of having one large SAN versus the management challenge of coordinating changes in a single environment.
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