18.6. Backup vs. Fault Tolerance
Data backup frameworks don't need to stop at redundant copies of data. Backup and downtime discussions go hand in hand. How long would it take to get a system back online if a primary server with important data went down? How crucial would this be to the organization's operation?
Fault tolerance goes a step beyond the conversation of backing up your data and into the conversation of what you would do if any component of the whole network environment failed. For example, if you are running a mail server and your primary Internet connection goes down, then what is the contingency plan? What if you were to lose the hard drive on the server because of hardware failure? What if the logic board on the server dies? ...
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