Date: Wed, 27 Apr 2022 08:04:34 -0500 From: Larry Rosenman <ler@lerctr.org> To: Tomoaki AOKI <junchoon@dec.sakura.ne.jp> Cc: "Eugene M. Zheganin" <eugene@zhegan.in>, freebsd-stable@freebsd.org Subject: Re: FreeBSD boot from root pool larger than 1Tb/cannot read MOS/all block copies unavailable Message-ID: <5914a66877e4799a405901b7c2c16505@lerctr.org> In-Reply-To: <20220427214502.f9ef1317f2911fb5247d1757@dec.sakura.ne.jp> References: <2c2d774c-3677-c3b7-d099-71318743a434@zhegan.in> <20220427214502.f9ef1317f2911fb5247d1757@dec.sakura.ne.jp>
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On 04/27/2022 7:45 am, Tomoaki AOKI wrote: [snip] > I've booting with around 1.5T or above (but under 2T) Root-on-ZFS > installation via UEFI for years. > > Basically, UEFI requires GPT partitioning. So many of those would boot > from larger than 1TB boot pool. > > As, IIRC, it is optional, some UEFI firmware would be able to boot from > MBR-patritioned disk but there would be some risk that they have the > same limitations as legacy BIOS in such situations. > > Note that possibly I'm just lucky enough not to be bitten. I've been booting UEFI from 10T pools for literally years, and I have a HP server with a 5T pool that IIRC boots GPT with BIOS, and a different Dell that has a 6T pool also GPT and UEFI. Just data points. -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 214-642-9640 E-Mail: ler@lerctr.org US Mail: 5708 Sabbia Dr, Round Rock, TX 78665-2106
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