VTOC?

Molnija: Solaris Partitioning scheme from back in ye olde days

I'm aware - but you were using that on i86pc?

Not in recent years. GPT is the current one. But yes there was usage and compat code for i86pc

I'm aware "prtvtoc" can print out EFI disklabels.

Well we added clean support for new things to the old tools

Why invent new tools

I can never seem to make sense of how to create a gpt disklabel with the vtoc tools. I just end up booting up a FreeBSD shiny circle and partitioning through gpart there