By default, VMware vCenter allows only vMotions between compatible source and destination CPUs. So if you have been trying to move a VM from one host to another, and you got stuck with a error message telling you that the CPU of your destination host is incompatible with the CPU configuration of your Virtual Machine, then this usually means one of the following:
c) you did not have your cluster of ESX hosts configured for Enhanced VMotion Compatibility (EVC)
- To enable NX or XD in the BIOS:
- Restart your host.
- While booting, before Windows starts, press the key to go to BIOS.
- In the BIOS, go to the Security tab.
- Look for the NX or XD flag.Note: For Intel processors, you see the XD flag and for AMD processors, you see the NX flag. If that is not enabled, toggle the option and enable it.
- Save the settings and exit the BIOS settings.
- Restart your computer.
- To enable the “No-Execute Memory Protection”
- Reboot the server and access the BIOS
- Select “Advanced Options”
- Enable “No-Execute Memory Protection” (this is what is called on HP servers)
- Press “F10″ to save and the server will restart.
- To have ESX hosts configured for Enhanced VMotion Compatibility (EVC)
- Right click your cluster and choose Edit Setting
- Click on the VMware EVC in the left panel
- Select the option “Enable EVC for Intel Hosts” or “Enable EVC for AMD Hosts”.
- Now choose your VMWare EVC mode: you can raise the EVC mode to expose more CPU features, or lower the EVC mode in order to hide CPU features and increase compatibility with older hardware
- Click Ok
Further informations can be retrieved in this article.
Posted in: VMware vSphere