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ThorinOFlag for United States of America asked on

Upgrade ESX 3.5 to 4.1 or fresh install?

I am in the process of upgrading 5 ESX 3.5 hosts to 4.1. I have already created a new 4.1 vCenter server and am ready to do the hosts. I would like to just upgrade from 3.5 to 4.1 using Update Manager. Has anyone done this, would the best thing be to remove them from the existing vCenter, add them to the new one and update each one?

Anyone had any issues upgrading, would anyone do the fresh install? One of my issues with the fresh install route is that the servers are managed so I will have to rely on the hosting company to do the work which also means waiting on them.
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ThorinO

8/22/2022 - Mon
dacasey

I tried it on a clone, the upgrade ran for some time and failed.  I created a new host and migrate from the 3.5 with no problems.
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king daddy

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ThorinO

If I go the fresh route, I would still want to remove them from the old vCenter and add them to the new one correct?

That way I would be able to vMotion aroudn with the new/old servers?
king daddy

ESX 4.1 requires vCenter 4.1 so I am pretty sure you'll have to add them to the new 4.1 vC. I upgraded my vC to 4.1 without issue so I didn't have to remove / add.
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ASKER
ThorinO

I tried upgrading, however due to the size of the /boot partition I am going to have to do a fresh install.