Hello Togehter..
Got a small problem here at the field 
Hm we have 3 ESX Server.
ESX4.1 4.1.0, 260247
ESX4.1 4.1.0, 260247
Used HW:
and new
ESX4.1i 4.1.0, 502767
Used HW:
I i try now to move a VM from an old to a new or a new to an old i get this error:
EVC is disabled on the Cluster and HA atm also.
I google that and found the VMware KB http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1003718
I palyed around with the NX DX flag i checked the Bios stuff on the new ESX (The old one ar still runnig so i cant check) But i know the
Mem Protection is enabled the VT also and also the Hypertheading.
I also tryed to reset the CPU mask on the VM.
A cold migration is working perfectly. The Network (VMotion) is also configured correct. and the VM tools are also installed on the VM.
Has any one a clue why this is not working?
I checked the CUP Details on the Intel Site.
http://ark.intel.com/products/37103/Intel-Xeon-Processor-E5530-(8M-Cache-2_40-GHz-5_86-GTs-Intel-QPI)
So there are Diffrence betwenn these maybe the most important the Instruction Set Extensions but could it be that they are incopatible.
I cant belve that ... yes an other difference is the Lithography but uhmm......
Im glad about any Inputs or Ideas.
Cheers
Florian