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I have managed to successfully UPGRADE my existing host from5.0 to 6.0. To fix the issue I was having, I started the ESXi Shell, authenticated and then checked the contents of both Bootbank and Altbootbank directories using the ls command. Altbootbank was empty. Then I copied all files from /bootbank to /altbootbank using the cp command and then I was able to see the 'upgrade' option again for which I had posted this question. Installation was straight-forward using the custom profile I had created using ESXI Customizer. Thanks for your help anyway, I will close this question now. Regards, Abid
Thanks!I had the same problem here and your tip solved my problem.
This worked for me going from 6.0 to 6.5 as well.
Thanks for sharing
I had the same problem and your tip solved my problem.
I know this is an old post but would it be possible for you to give me a step by step on how you did the copy process