ESXi ‘last known good configuration’

ESXi has two installations, firmware. build or configurations. ; the actual one running and the standby.

At each VMware update, the standby build is updated and thereafter the standby build is switch to being the actual build.  
When something went wrong with the update, a rollback can be performed by during boot, when “loading vmware hypervisor” is displayed, press to select standby after that shift + y to confirm and press enter

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About Marcel van den Berg
I am a technical consultant with a strong focus on server virtualization, desktop virtualization, cloud computing and business continuity/disaster recovery.

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