There are a few other things to consider as well such as making sure you've tested both failover and failback (in...
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both directions). Many people assume that as long as the failover works then that's all that needs to be done. This is a big oversight. Be sure to test (and document) your procedures for getting things back up and running at your main site.
Also, if bandwidth is a concern for you, then look into wide-area network (WAN) acceleration technologies, or at least ensure your data is being compressed and you have a full and differential/incremental schedule setup so that the disaster recovery site is up to date and within your business tolerance.
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