Advice on how to perform server migrations

[cat2devnull]

I need to rearrange a couple of Unraid servers to suit a change of requirements and I'm not sure on the best way to do it.

 

Current setup:
Server 1: Fileserver & VMs

• Cache Drives A & B
• Array Drives C, D & E
• Dedicated VM Drive F

Server 2: Dockers

• Array Drives G & H

 

Proposed setup:

Server 1: VMs

• Array Drives A & B
• Dedicated VM Drive F

Server 2: Fileserver & Dockers

• Cache Drives G & H
• Array Drives C, D & E

 

Effectively what I want to do is move the array from server 1 -> 2.

In doing so on server 1, I need to move the existing cache drives to become the array and on server 2, I need to move the array drives to become the cache drives.

 

I should be able to juggle the data around from cache to array easily enough using the inbuilt options for the shares and the mover script. My concern is more around moving the main fileserver array between machines and moving the cache to array and array to cache. Anyone have any ideas on how to do this?
Should I back the data up to an different drive and format/reassign the drives or is there a smarter way?

Edited October 25, 2021 by cat2devnull