You can view fault tolerant virtual machines in the vCenter Server inventory using the vSphere Web Client.

Note: You cannot disable Fault Tolerance from the Secondary VM.

A vSphere Fault Tolerance section (pane) appears in the Summary tab for the Primary VM and includes information about the virtual machine.

Fault Tolerance Status
Indicates the Fault Tolerance status of the virtual machine.
  • Protected. The Primary and Secondary VMs are powered on and running as expected.
  • Not Protected. The Secondary VM is not running. Possible reasons are listed in the table.
    Table 1. Reasons for Primary VM Not Protected Status
    Reason for Not Protected Status Description
    Starting Fault Tolerance is in the process of starting the Secondary VM. This message is only visible for a short period of time.
    Need Secondary VM The Primary VM is running without a Secondary VM, so the Primary VM is currently not protected. This occurs when no compatible host in the cluster is available for the Secondary VM. Correct this by bringing a compatible host online. If a compatible host is online in the cluster, you might need to investigate further. Under certain circumstances, disabling Fault Tolerance and then re-enabling it corrects this problem.
    Disabled Fault Tolerance is currently disabled (no Secondary VM is running). This happens when Fault Tolerance is disabled by the user or when vCenter Server disables Fault Tolerance after being unable to power on the Secondary VM.
    VM not Running Fault Tolerance is enabled but the virtual machine is powered off. Power on the virtual machine to reach Protected state.
Secondary location
Displays the ESXi host on which the Secondary VM is hosted.
Total Secondary CPU
The CPU usage of the Secondary VM, displayed in MHz.
Total Secondary Memory
The memory usage of the Secondary VM, displayed in MB.
vLockstep Interval
The time interval (displayed in seconds) needed for the Secondary VM to match the current execution state of the Primary VM. Typically, this interval is less than one-half of one second. No state is lost during a failover, regardless of the vLockstep Interval value.
Log Bandwidth
The amount of network capacity being used for sending vSphere Fault Tolerance log information from the host running the Primary VM to the host running the Secondary VM.