By default, Update Manager is configured to take snapshots of virtual machines before applying updates. If the remediation fails, you can use the snapshot to return the virtual machine to the state before the remediation.

About this task

Update Manager does not take snapshots of fault tolerant virtual machines and virtual machines that are running virtual machine hardware version 3. If you decide to take snapshots of such virtual machines, the remediation might fail.

You can choose to keep snapshots indefinitely or for a fixed period of time. Use the following guidelines when managing snapshots:

  • Keeping snapshots indefinitely might consume a large amount of disk space and degrade virtual machine performance.

  • Keeping no snapshots saves space, ensures best virtual machine performance, and might reduce the amount of time it takes to complete remediation, but limits the availability of a rollback.

  • Keeping snapshots for a set period of time uses less disk space and offers a backup for a short time.


Required privileges: VMware vSphere Update Manager > Configure


  1. Use the vSphere Client or the vSphere Web Client to connect to a vCenter Server system with which Update Manager is registered.
  2. Depending on the client you use to connect to vCenter Server perform the following steps.



    vSphere Web Client

    1. On the Manage tab, under Settings, click VM Settings.

    2. Click Edit.

    vSphere Client

    1. On the Configuration tab, under Settings, click Virtual Machine Settings.

  3. To take snapshots of the virtual machines before remediating them, leave Take a snapshot of the virtual machines before remediation to enable rollback selected.
  4. Configure snapshots to be kept indefinitely or for a fixed period of time.
  5. Click Apply.


These settings become the default rollback option settings for virtual machines. You can specify different settings when you configure individual remediation tasks.