We have a small cluster of ESX 3.5 u2 servers and VC 2.5 u2. Should we upgrade Virtual Center first, then the ESX servers? Or, ESX first.
I recommend upgrade vCenter first. VMware engineers finally fixed the problem with update manager plugin unloading in vCenter 2.5u4.
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I believe it is usually recommended to upgrade vCenter first and then the esx hosts.
www.phdvirtual.com, makers of esXpress