We just added a 4th host into our cluster -- DELL R420. The other 3 older hosts are DELL 2950.
(3) DELL 2950 - 2 CPUs - Xeon E5420
(1) DELL R420 - 2 CPUs - Xeon E5-2450 (10.0.128.4 is the new host)
When trying to vMotion to this new host we are getting the error message below. vMotioning to older hosts is not a problem.