[Bug 289690] dynamic_gang_header is not supported by current loader

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 19 Sep 2025 16:34:07 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=289690

--- Comment #2 from Andriy Gapon <avg@FreeBSD.org> ---
(In reply to Mark Johnston from comment #1)
A middle-ground would be to disallow enabling the feature if bootfs is set and
to disallow setting bootfs if the feature is enabled.
But I am not sure if every boot pool actually has bootfs set; I recall some
people using, against best practices, of course, the root dataset as the boot
dataset.

P.S.
I long wanted to disqualify pools without explicitly set bootfs from booting,
but that's harder to do than I initially imagined and it's a different topic
altogether.

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