On Tue, Jun 01, 2021 at 11:38:42PM +0000, RVP wrote: > One of the migrated GPT partitions will have to be shrunk to make room > for the EFI ESP, and /usr/mdec/*.efi will have to be copied into it.
I would try gpt migrate and the make the NetBSD partition bootable with gpt biosboot, so we can avoid the EFI partition. If the old disk is bootable, then the net result should also be bootable. But for all partitioning changes: never try without a full backup. Martin