How to maximize file server redundancy?

How to maximize file server redundancy?
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answer:Not to be a stick in the mud, but that's what IT consulting companies do... Questions to ask yourself: What level of uptime are they looking for? 99.9% is easy, 99.99% is a lot harder. How much money are they willing to invest in their uptime... conversly, how much will they lose by not being up? How redundant are their end nodes? E.g., does each employee carry two blackberries in case one breaks? Multiple internet connections for the corp. office?
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