Date: Wed, 4 May 2022 07:21:53 -0600 From: Warner Losh <imp@bsdimp.com> To: f451 <f451@imap.cc> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: is gptzfsboot relevant on arm64? Message-ID: <CANCZdfpwScqcie%2BHryXZ%2B-9vF7cqn6Dch0yh3AsUyuB0fu2v_g@mail.gmail.com> In-Reply-To: <c5535862-7dec-4344-b9f1-80b3b5566ee2@www.fastmail.com>
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[-- Attachment #1 --] On Wed, May 4, 2022 at 7:13 AM f451 <f451@imap.cc> wrote: > Hello, > > On arm64 I have this:- > > % uname -KU > 1400057 1400057 > % man 8 gptzfsboot > No manual entry for gptzfsboot > % > > Is gptzfsboot only for certain archs? I only query it because recently > zpool offered an > upgrade and suggested looking at it. I see that man 8 gptzfsboot is > available on > 13-stable on amd64. > No. It's not relevant for ARM 64. It's only relevant for BIOS systems, which are exclusive i386/amd64. ARM64 uses UEFI exclusively for booting, and has a combined boot loader for both ZFS and UFS systems (gptzfsboot exists because of space limitations on x86 and the kinda funky way that ZFS reserves space for a boot loader). Warner [-- Attachment #2 --] <div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 4, 2022 at 7:13 AM f451 <<a href="mailto:f451@imap.cc">f451@imap.cc</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hello,<br> <br> On arm64 I have this:-<br> <br> % uname -KU<br> 1400057 1400057<br> % man 8 gptzfsboot<br> No manual entry for gptzfsboot<br> %<br> <br> Is gptzfsboot only for certain archs? I only query it because recently zpool offered an <br> upgrade and suggested looking at it. I see that man 8 gptzfsboot is available on <br> 13-stable on amd64.<br></blockquote><div><br></div><div>No. It's not relevant for ARM 64. It's only relevant for BIOS systems, which are exclusive i386/amd64.</div><div>ARM64 uses UEFI exclusively for booting, and has a combined boot loader for both ZFS and UFS</div><div>systems (gptzfsboot exists because of space limitations on x86 and the kinda funky way that ZFS</div><div>reserves space for a boot loader).</div><div><br></div><div>Warner </div></div></div>help
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