Downgrade ESXi 7 to ESXi 6.7 on UCS

[silvakizir]

Hi guys.
I have a UCS Server model C220M6 which is BE6K-M6-K9 and came with preinstalled ESXi version 7.0.
For a specific migration/compatibility reason I need to downgrade to ESXi version 6.7
As far as I know I can't do a ESXi downgrade from version 7.0 to version 6.7 but instead I can do a new installation of ESXi version 6.7
If I follow the instructions in the bellow link will I be able to install ESXi version 6.7 with success?
https://community.cisco.com/t5/service-providers-knowledge-base/install-cisco-esxi-6-5-0-on-ucs/ta-p/3183682
Do I have to erase the existing pre-installed ESXi version 7.0?
Thank you in advance.

[Roger Kallberg]

Why do you not ask this question in the UCS part of the Data Centre in the community? It’s not at all related to Collaboration.

[silvakizir]

My mistake but I'm afraid I can't change the section now.

[Roger Kallberg]

I had it moved for you.

[collinks2]

Yes you can do a fresh installation of esxi 6.7 but select the option
'preserve Datastore' so you wont loose your existing files and vms

[silvakizir]

I don't mind about the VMs/Files of the Datastore but anyhow thank you for mentioning.

So the only thing I have to do is to follow the steps of the link I posted?

[RedNectar]

@silvakizir ,

You'll need two things

1. A bit of intelligence to translate version numbers + some steps may be slightly different, such as needing to "Accept the session" (Step 3)
2. follow the instructions at https://community.cisco.com/t5/service-providers-knowledge-base/install-cisco-esxi-6-5-0-on-ucs/ta-p/3183682 

And you'll be fine.  The key thing is to make sure you start with the right .iso image.