Should You Upgrade to ESXi 5.1?
If you are upgrading to ESXi 5.1, there are some important facts that you should consider first. Upgrading involves many stages and processes that must be performed in a specific order. Many of these processes are one-way and do not provide a “back button.” If you do not use care and consideration in your upgrade plan, you could possibly lose important data and configuration, and potentially even lose contact with your servers. Understanding how to upgrade properly will ensure that you endure as little downtime as possible on each of your vSphere components.
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