Reading Time: 3 minutes The upgrade path to vSphere 5.1 is quite similar to the upgrade path to vSphere 5.0 and is well described in the specific guide (vSphere Upgrade Guide). In some cases an in-place upgrade can be applied with the advantage to require less time and to keep all (or most) of the settings and configurations. For example, a vCenter Server 4.1 can be directly updated to the 5.1 version (the requirements of the two versions are quite the same) or an old ESXi can be updated to ESXi 5. But in most cases, also when the […]