Re: [gentoo-user] rescue cd for zfs 2.1 or thereabouts

[Rich Freeman <rich0@gentoo.org>]

On Mon, Aug 23, 2021 at 1:57 PM Neil Bothwick <neil@digimed.co.uk> wrote:
>
> On Mon, 23 Aug 2021 13:37:01 -0400, Rich Freeman wrote:
>
> > > Your root pool setup doesn't really matter for GRUB compatibility.
> > > What's important is that you have the proper features setup on your
> > > boot pool. That's the one GRUB loads.
> >
> > Sure, and in this case /boot is on my root pool.
> >
> > In any case, it would be nice if there was some way to tell what zpool
> > features grub requires, as it is a limiting factor for whatever pool
> > /boot happens to be on.
>
> Aren't new features only applied to newly created pools and datasets? If
> /boot was compatible with GRUB it should still be. At least that's how I
> read the einfo messages zfs spits out.

That is correct.  I want to know when I can enable the new features.
Of course, it would also be nice to know which features must be
disabled when creating a new boot pool.

It is just frustrating that as far as I can tell, there is no
documentation about what features grub supports.  It wouldn't be hard
for them to just say "here are the zpool features known to work in
grub version foo."  The best I've found is the Arch wiki, which has
the disclaimer that it is probably out of date and to check the man
pages, but of course the man pages don't actually say anything.

-- 
Rich