I have ten ESXI 4.1 Update 1 and 2 hosts I want to upgrade to ESXI 4.1 Update 3. I updated my vCenter server to 4.1.0 Update 3 (Build 799345) and VUM to 4.1.0 Update 3 (4.1.0.13360). I downloaded the upgrade file update-from-esxi4.1-4.1_update03.zip but when I try to import it from Import Upgrade Release, I get the error message:
File name: update-from-esxi4.1-4.1_update03.zip
Failed to import data
The uploaded upgrade package is not a valid upgrade package
Is it because it's an update file and not an upgrade file (e.g. upgrade-from-ESXi4.0-to-4.1.0-0.0.260247-release.zip)? If that's the case, does anyone know which file I would use; I can't find another one to upgrade from ESXi 4.1 U1/2 to ESXi 4.1 U3.