Upgrading the virtual machine hardware
Once VMware Tools has been upgraded, you can upgrade the virtual hardware for the virtual machines. The virtual hardware will determine the BIOS/EFI used, CPU and memory maximums for the virtual machine, and other features. Virtual hardware Version 10 was released with ESX 5.5. The new features of hardware Version 10 are covered in Chapter 10, Creating and Managing Virtual Machines.
In this recipe, I will discuss the steps required to upgrade the virtual machine hardware. Once you upgrade to the current virtual hardware version, you cannot downgrade it. If you have a multiversion ESX cluster, then make sure that the VM version (virtual hardware version) is at a level supported by all the participating hosts ...
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