Reverting to a previous version of ESXi after a failed upgrade (1033604)

Purpose

This article provides steps to revert to a previous version of ESXi after a failed upgrade.

Resolution

To revert to a previous version of ESXi after a failed upgrade:

 

Note: Back up your configuration data before making any changes.

1. In the console screen of the ESXi host, press Ctrl+Alt+F2 to see the Direct Console User Interface (DCUI) screen.
2. In the DCUI screen, press F12 to view the shutdown options for the ESXi host.
3. Press F11 to reboot.
4. When the Hypervisor progress bar starts loading, press Shift+R. You see a popup with a warning:
   Current hypervisor will permanently be replaced
   with build: X.X.X-XXXXXX. Are you sure? [Y/n]
   
5. Press Shift+Y to to roll back the build.
6. Press Enter to boot.

Source:-

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1033604