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Table Of Contents
When a choice between CPU compatibility or guest operating system features (such as NX/XD) exists,
VMware provides check-box options to configure individual virtual machines. You can access the
configuration options through the Advanced Settings option for the CPU of the virtual machine. For more
control over the visibility of CPU features, you can edit the CPU compatibility mask of the virtual machine
at the bit level.
Caution Changing the CPU compatibility masks can result in an unsupported configuration. Do not
manually change the CPU compatibility masks unless instructed to do so by VMware Support or a
VMware Knowledge base article.
CPU compatibility masks cannot prevent virtual machines from accessing masked CPU features in all
circumstances. In some circumstances, applications can detect and use masked features even though
they are hidden from the guest operating system. In addition, on any host, applications that use
unsupported methods of detecting CPU features rather than using the CPUID instruction can access
masked features. Virtual machines running applications that use unsupported CPU detection methods
might experience stability problems after migration.
View CPUID Details for an EVC Cluster
The feature set that is exposed by an EVC cluster corresponds to the feature set of a particular type of
processor. Processor feature sets are described by a set of feature flags that you examine using the
CPUID instruction.
You can view the CPUID feature flags currently exposed by the hosts in an EVC cluster.
Procedure
1 Select a cluster in the inventory.
2 Click the Configure tab.
3 Select VMware EVC and expand Current CPUID Details.
This VMware EVC panel displays the CPUID feature flags that EVC enforces for the hosts in this cluster.
For information about CPUID feature flags, see the Intel and AMD websites.
Migrate a Powered-O or Suspended Virtual Machine in
the vSphere Web Client
You can use cold migration to move a virtual machine and its associated disks from one datastore to
another. The virtual machines are not required to be on shared storage.
Prerequisites
n
Make sure that you are familiar with the requirements for cold migration. See Cold Migration.
n
Required privilege: Resource.Migrate powered off virtual machine
vCenter Server and Host Management
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