Organising my array

[oldfart]

I am trying to tidy my *very* messy system.

 

1. I have existing VMs - 2 of them are split over two drives.
How do I combine them/back them up to move?

 

2. I have 6 (2TB) disks - I intend to use 1-3 for VMs and 4-6 for data
would it make sense to make a "VM" share (over the first 3 disks) then use that share when creating a new VM
or
just assign disk 1,2 or 3 when creating the VM

Thanks