Re: EFI amd64: boot.cfg goes where?

Thank you for the overview of GPT versus disklabel versus the booter
because it did a great job of demystifying it all for me.

On Thu Aug 6, 2026 at 4:57 AM MDT, Robert Elz wrote:
>   | I am a little curious as to how my NetBSD rootfs at GPT
>   | partition 4 is called hd0d by the booter
>
> Is it?   You shouldn't care, don't use those kinds of names when
> booting from GPT.   Instead use the NAME=label syntax (but beware,
> for NetBSD currently, the total length of the "NAME=label" for the
> root/boot filesystem (and only that one) is 16 bytes (I think 15 useful
> ones, plus a \0).   Since "NAME=" consumes 5 of those, the label for
> the NetBSD root filesystem needs to be 10 bytes, or less (labels are
> actually UTF-8 strings (except for in the GPT label itself, where they are
> UCS-2 (more or less UTF-16) but that's of no concern to almost anything),
> so one character, if it isn't ascii, can use 2 3 or 4 bytes).

I'm very surprised to hear about another UCS-2 application in the wild.
I had sort of assumed 8B ASCII was the limit because PC/MS-DOS.

> When using gpt, there is no concept at all of the "whole device" when
> referring to partitions, GPT partitions are not allowed to overlap each
> other (unlike disklabel partitions), so you cannot have a partition, and
> something such as the "whole device", as they would have blocks in common