We have a 3 node DAG, 2 at a main site and 1 at a DR, and we are going to do power maintenance on our SANs at HQ and I am wondering if there are any caveats I should be aware of. The SANs host ALL our databases for Exchange. I am aware of DAG maintenence mode, but I want to know about bringing the HQ site back once the work is complete. Our backups are at SAN level and not exchange aware, so we use circular logging. Should we disable this as a contingency if we cannot get the main site back up again? Are there any other things I should watch out for, or should this be quite straightforward?
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