In the next six posts I will describe the process I'm using to upgrade my Virtual Infrastructure 3.5 production cluster to vSphere 4.0. BTW, am I the only one that still dislike the "vSphere" moniker? What was wrong with "Virtual Infrastructure"? At least that is more descriptive! What does a vSphere describe? Okay, I understand the "v" in front is short for virtual (maybe?). So is this a virtual sphere? The marketing folk need to rethink their branding practices. Now if they come out with some coherent brand strategy that ties the whole "sphere" thing together with their products, I'll have to take everything back, but as it stands it's worthless. But I digress...

I will publish everything in six parts:
Part 1: Planning
Part 2: Testing
Part 3: Upgrade to vCenter 4.0 and SRM 4.0
Part 4: Upgrade ESX Hosts
Part 5: Upgrade Virtual Machines
Part 6: Conclusion