I don't think this layout from the installer is correct, but I could be wrong. Is there any reason to have a freebsd-boot in this layout created by the installer when using UEFI?
% gpart show => 40 537234688 ada0 GPT (256G) 40 409600 1 efi (200M) 409640 1024 2 freebsd-boot (512K) 410664 984 - free - (492K) 411648 67108864 3 freebsd-swap (32G) 67520512 469712896 4 freebsd-zfs (224G) 537233408 1320 - free - (660K)
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