Please confirm this: Vmotion will not work between HP BL460c G1 and HP BL460c G6

[kuay5]

Hi, is it true that Vmotion will not work between HP BL460c G1 and HP BL460c G6? We have a vendor who is telling us this. Something to do with the processor.

Anyways to make it work assuming this is true?

[chilow · Accepted solution]

This depends on the processors that are installed in each system. You might be able to use EVC to allow VMotion between the servers.

http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=1005764&sl... Id

-C

[AntonVZhbankov]

Both hosts should be in the same cluster with EVC enabled.

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MCSA, MCTS, VCP, VMware vExpert '2009

http://blog.vadmin.ru

[kuay5]

Hi guys, thanks. Done some readup on EVC, so please correct my understanding if i am wrong. EVC makes the newer processor run in a sort of compatibility mode, which is consistent to that of the older CPUs with the cluster, right? So in a nutshell if i run EVC i stand to lose some processing power/features right?

[raadek]

Hi,

Have a look at:

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=100321...

In your particular case you'll be clustering Intel Xeon 54xx with Xeon 55xx, so this EVC baseline should be applied:

Intel® Xeon® 45nm Core™ 2 - Applies baseline feature set of Intel® Xeon® 45nm Core™2 (Penryn) processors to all hosts in the cluster.

Compared to the Intel® Xeon® Core™2 EVC mode, this EVC mode exposes additional CPU features including SSE4.1

So this is what you will be loosing CPU-feature-wise (next baseline, which won't work with 54xx):

Intel® Xeon® Core™ i7 Applies baseline feature set of Intel® Xeon® Core™i7 (Nehalem) processors to all hosts in the cluster.

Compared to the Intel® Xeon® 45nm Core™2 EVC mode, this EVC mode exposes additional CPU features including SSE4.2 and POPCOUNT

This isn't anything major in my opinion you should be too concerned about.

Regards,

Radek

[AntonVZhbankov]

Unless you are working with latest multimedia software in VM for video editing or 3D rendering difference will be negligible.

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MCSA, MCTS, VCP, VMware vExpert '2009

http://blog.vadmin.ru