[ovirt-users] Windows Product Activation

[Michal Skrivanek]

> On 22 Dec 2016, at 22:02, Nicolas Ecarnot <nicolas at ecarnot.net> wrote:
> 
> Le 22/12/2016 à 17:26, Yaniv Kaul a écrit :
>> Windows activation, at least for 2008 and below, depend on enough hardware changes to happen. Each HW (of non-pluggable devices) change is a single 'penalty' point - except for NIC (based on MAC address) which is more. 4 or so points - and it requires re-activation. This does not apply to KMS licenses.
>> 
>> So unless you drastically change the hardware, you should be safe.
>> Y.
> Hello Yaniv,
> 
> When migrating, these VMs can jump from a recent hardware host to an older one, with a different generation CPU (though of the same intel kind).
> 
> I read more about this WPA issue, and I also checked : all our licences are MAK_B kind, which I read everywhere that they should not induce such WPA trouble, once they are correctly registered (which I obviously take care of).
> I also read the list of components that are checked to create a hashed key linked to the licence.
> As you wrote, changing to many components is triggering a validity break.
> 
> Knowing this, may I ask you to comment on the promising "VM Custom Serial Number" Alex was talking about : it sounded perfect, but eventually not enough to cope with the hardware change?

That’s what it is for.
Does it not work for this case?
There was a report of certain bits in cpuid being exposed from hypervisor without emulation, but that was quite obscure and IIRC not related to Windows licenses

> 
> -- 
> Nicolas ECARNOT
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