"The CPU on the host is not supported by the image. Please refer to KB 82794." when upgrading vSAN witness appliance
search cancel

"The CPU on the host is not supported by the image. Please refer to KB 82794." when upgrading vSAN witness appliance

book

Article ID: 389689

calendar_today

Updated On: 03-04-2025

Products

VMware vSAN

Issue/Introduction

When upgrading the vSAN witness appliance from version 8.0.2, 22380479 to version 8.0 U3b - 24280767, an error occurs.

 

"The CPU on the host is not supported by the image. Please refer to KB 82794."

 

Note : The link to the above kb article is now contained here but the message in vSphere remains the same : https://broadcomcms-software-agent.wolkenservicedesk.com/wolken/esd/knowledge-base-view/view-kb-article?articleNumber=389689

 

Environment

vSAN 8.x

Cause

Having downloaded and installed the vSAN witness appliance (distributed as an OVA file), the appliance shows an earlier version of the CPU than what is running on the physical Host where the appliance is running.

This issue is explained in the following kb : https://broadcomcms-software-agent.wolkenservicedesk.com/wolken/esd/knowledge-base-view/view-kb-article?articleNumber=389689

Since this is an embedded Witness appliance running on the Host, upgrading the HW version allows the CPU version to match what is running on the physical Host and allows the upgrade to proceed.

Resolution

  • Download the latest vSAN Witness OVA Appliance
  • Install the above Appliance
  • Upgrade the Virtual Machine HW version for the appliance to version 21
  • This will change the version of the CPU on the appliance to match the later CPU running on the physical ESXi Host
  • This will allow the upgrade from 8.0.2, 22380479 to version 8.0 U3b - 24280767 to complete without error.