How to Enable Fault Tolerance for a Virtual Machine
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Right click on a Virtual Machine and select Fault Tolerance > Turn On Fault Tolerance
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Click on the dropdown and select Browse…
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Select a different Datastore than the one currently used and click on OK
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Repeat the process for each file and make sure Compatibility checks is succeeded and then click on Next
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Select a different Host and click on Next
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Click on Finish
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Once completed you will notice your VM is now a dark blue color. Click on the VM and select Summary, you should now see a Fault Tolerance section with the Fault Tolerance status in a Protected state
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Right click on our FT virtual machine and select Fault Tolerance > Test Failover
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Once completed you should now see that the Secondary VM location has changed to a different host
Test Fault Tolerance Failover