---
title: "VMware Fault Tolerance"
description: "The Fault Tolerance (FT) functionality of VMware’s vSphere allows you to protect a virtual machine from hardware failures by cloning the VM on two separate host"
url: https://docs.us.ovhcloud.com/en/hosted-private-cloud/vmware/fault-tolerance-continuity
lang: en
---
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# VMware Fault Tolerance

The **Fault Tolerance** (FT) functionality of VMware’s vSphere allows you to protect a virtual machine from hardware failures by cloning the VM on two separate hosts.

 

## Requirements

- vSphere HA activated
- Resource reservation equal to 100% of memory
- VMware Tools installed
- Same generation processors
- 4 vCPUs maximum

 

## Instructions

To activate **Fault Tolerance**, right-click on a VM and click `Fault Tolerance` and `Turn On Fault Tolerance`.

A configuration window will open, prompting you to make choices for the secondary VM.

1. **Select datastores:** Select datastores to place the secondary VM disks and configuration files.
2. **Select host: **Select a host for the secondary VM.
3. **Ready to complete:** Review your selections and click `FINISH` to turn on fault tolerance.

**Note:**

Your virtual machine is now protected by **Fault Tolerance**. Its icon will change, and "primary" will be added to its name.

Several operations are now available when you right-click your VM and choose `Fault Tolerance`.

 

## Go further

- [Broadcom documentation](https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/8-0/vsphere-availability/providing-fault-tolerance-for-virtual-machines.html)

Browse all the [VMware on OVHcloud guides](https://docs.us.ovhcloud.com/en/hosted-private-cloud/vmware/landing-page-vmware.md).

Browse the rest of the [OVHcloud US documentation](https://docs.us.ovhcloud.com/en/index.md) for guides on our other products and services.

Learn more about [VMware on OVHcloud](https://us.ovhcloud.com/hosted-private-cloud/vmware/) on the OVHcloud US website.