1) Here is the running version on VMware workstation.I will show how to update the current 4.1 to 5.0.2) Connect to Hypervisor server by v Sphere client and shutdown or pause the working virtual machines.3) Shutdown the ESXi 4.1 host and mount ESXi (v Sphere) 5 installation medium. Burn it on CD (if it’s a physical host) or use the same ISO (If it is running on virtualized environment, like mine)4) Now start the host from CD/DVD.This guide explains simple steps to update VMware ESXi 4.1 to 5.0 version.The update can be done in several ways depending on the running environment of Server virtualization software VMware ESXi.
The easy and recommended way is, in-place update buy booting the hypervisor server with ESXi 5 installation ISO or DVD.
I have a running ESXi 4.1 on VMware workstation for testing purpose which is on Windows 7 host.
Select first option as installing on new host.5) Wait for all scripts to be loaded and press to accept license term.
It will list out the detected disk partitions in next screen.
Select the partition which is having VMware ESXi 4.1 installation.
That will be shown with * mark.6) Next screen will inform about existing ESXi and VMFS datastore.