Hi. I have a VM that is currently sitting in a different cluster. This cluster is running EVC mode "Sandy Bridge." I need to migrate it to a cluster of 12 host that are running EVC mode "Meron." I get an error when trying to vmotion due to features being disabled. Can I change the EVC mode? If so, what impact would this have?
If I read the compatibility chart correctly, it looks like "Merom" EVC is more restrictive than the "Sandy Bridge."? If I am going from Merom to Sandy Bridge, wouldn't I be upgrading?
EVC effects what cpu instructions are available to the vm when its turned on., which is why you get the error you are seeing, since the running vms don't have those instructions exposed. It works the other way because the newer cpus still have the same as the older ones still. All EVC reall does is hides the newer cpu instruction sets.
I have about 2,500 VM's running in a 12 host cluster with EVC mode "Meron"
I have 1 VM running in a 3 node cluster with EVC mode "Sandy Bridge."
I need to get that 1 VM to the other cluster running "Meron." What would be my best option here?
You need to connect directly to the host its on, shut it down, remove it from inventory and then go to the other host and find it in the datastore its stored in and add it to the inventory again. The have an article about enabling evc that talks about doing the same thing
Hello alainap84 ,
For migrating between different EVC types I would recommend using per VM EVC which is available from vsphere 6.7 onwards.
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