Gregory,
Looks like Scale Computing competes directly with VxRail (VMware w/ Dell/EMC product) and other HCI appliances - Nutanix AHV comes to mind as well... Although, first glance - looks like you don't need and or can't use the VMware hypervisor in any way. Can I assume Scale has a VM converter? v2v like tools?
That's correct. We use the Linux KVM hypervisor rather than working with something like VMWare.
You can directly upload vmdk, qcow2, img, vhd and vhdx, and the system will automatically convert them before use if needed. We're natively using qcow2 internally.
We also have a partnership with Carbonite for p2v migrations.