CPUID – VMotion CPU Compatibility

We have problems doing a vmotion (ESX 4) from virtual machines from a Dell R710 to a Dell PowerEdge 2950. It gives a SSE4.2 error before we can vmotion it.

A quick solution is to set CPU Masks. To do this, do the following:

  1. Shut down the server
  2. Edit settings
  3. Go to Options
  4. Choose CPUID Mask
  5. Select the Expose Options
  6. Click Advanced
  7. Set the following options:
    Feature Level Row Mask
    SSE4.2 1 ecx —- —- 0–0 —- —- —- —- —-
    80000001 edx —- 0— —- —- —- —- —- —-
  8. Press OK twice

Now you can do a vmotion.

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