After you imported the firmware updates to vCenter Server, you can remediate your vSAN cluster using Update Manager.

To update the firmware of your vSAN cluster, you must remediate the cluster against the vSAN system baseline group that contains the firmware update. For risk mitigation, you can perform separate firmware and software updates. Alternatively, to shorten the maintenance window, you can perform a single update, that updates both firmware and software.


  • Verify the firmware vendor tool is installed.
  • Import the latest available and supported firmware.
  • Update Manager displays a vSAN system baseline group for the cluster.
  • Verify there are no failed vSAN health checks.
  • Review the list of supported I/O controllers at


  1. In the vSphere Client, select Hosts and Clusters and select a vSAN cluster from the inventory.
  2. Select the Updates tab.
    You are in the Update Manager compliance view.
  3. Select Host Updates.
  4. From the Attached Baselines and Baseline Groups list, select the vSAN cluster baseline group.
  5. Click Remediate.
    The Remediate dialog box opens.
  6. (Optional) To accept the end-user license agreement, select the check box, and click OK.
  7. (Optional) Resolve any remediation pre-check issues.
    The number of issues with your vSAN cluster is displayed at the top of the Remediate dialog box. For more details and actions you must perform, click Show Full Remediation Pre-check Report
  8. Select what type of update to perform.
    Table 1. Remediation Options
    Option Result
    Update Software and Firmware The hosts are upgraded to the latest recommended ESXi version and latest supported patches. The firmware is also updated to the latest available and supported version. The remediation starts with the software upgrade, then the firmware update follows.
    Update Software only The hosts are upgraded to the latest recommended ESXi version and latest supported patches.
    Update Firmware only The hosts are updated to the latest available and supported firmware version.
  9. (Optional) To view the contents of the baseline or the baseline group, expand the Install list.
  10. (Optional) Expand Scheduling Options and select Schedule this remediation to run later.
  11. (Optional) Expand Remediation settings and click Close Dialog and go to Settings to edit the default host remediation configuration.
  12. (Optional) Expand Remediation settings and deselect the Check host health after installation check box.
    If vSAN health check detects issues the entire cluster remediation might fail, and the ESXi host that is upgraded might stay in maintenance mode. Disabling the option prevents the vSAN health check from running.
  13. Click Remediate to start the process.


After the remediation process finishes, your vSAN cluster runs the latest available and supported firmware and recommended software versions.