Date: Fri, 16 Dec 2016 20:55:12 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Eric van Gyzen <vangyzen@FreeBSD.org> Cc: Fernando Herrero =?utf-8?Q?Carr=C3=B3n?= <elferdo@gmail.com>, freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: Upgrading boot from GPT(BIOS) to GPT(UEFI) Message-ID: <20161216175512.GN98176@zxy.spb.ru> In-Reply-To: <b9ede396-2a86-8319-2f40-fe1c40cc6483@FreeBSD.org> References: <CAMwkeZznenmN1RkUaKZ7i12F0FA185ZH%2BcHPXUp56S8j3SrubQ@mail.gmail.com> <20161216173930.GD90401@zxy.spb.ru> <b9ede396-2a86-8319-2f40-fe1c40cc6483@FreeBSD.org>
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On Fri, Dec 16, 2016 at 11:43:18AM -0600, Eric van Gyzen wrote: > On 12/16/2016 11:39, Slawa Olhovchenkov wrote: > > On Fri, Dec 16, 2016 at 06:08:34PM +0100, Fernando Herrero Carrón wrote: > > > >> Hi everyone, > >> > >> A few months ago I got myself a new box and I have been happily running > >> FreeBSD on it ever since. I noticed that the boot was not as fast as I had > >> expected and I've realized that, while my disk is GPT partitioned, the boot > >> process is still BIOS based: > >> > >> % gpart show > >> => 34 976773101 ada0 GPT (466G) > >> 34 6 - free - (3.0K) > >> 40 1024 1 freebsd-boot (512K) > >> 1064 984 - free - (492K) > >> 2048 67108864 2 freebsd-swap (32G) > >> 67110912 909662208 3 freebsd-zfs (434G) > >> 976773120 15 - free - (7.5K) > >> > >> I am reading uefi(8) and it looks like FreeBSD 11 should be able to boot > >> using UEFI straight into ZFS, so I am thinking of converting that > >> freebsd-boot partition to an EFI partition, creating a FAT filesystem and > >> copying /boot/boot.efi there. > >> > >> How good of an idea is that? Would it really be that simple or am I missing > >> something? My only reason for wanting to boot with UEFI is faster boot, > >> everything is working fine otherwise. > >> > >> Thanks in advance for your help. > > > > I am also interesting by this case. > > I think expand freebsd-boot to about 1M (size of /boot/boot1.efifat), > > dding /boot/boot1.efifat and set to type to 'efi' may be enough. I am > > never tried this. > > I expect that would work. It's slightly risky, though, since it doesn't let you > fall back to BIOS boot if EFI doesn't work. Live cd/USB can be fallback for this case.
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