Date: Fri, 16 Dec 2016 11:43:18 -0600 From: Eric van Gyzen <vangyzen@FreeBSD.org> To: Slawa Olhovchenkov <slw@zxy.spb.ru>, =?UTF-8?Q?Fernando_Herrero_Carr=c3=b3n?= <elferdo@gmail.com> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: Upgrading boot from GPT(BIOS) to GPT(UEFI) Message-ID: <b9ede396-2a86-8319-2f40-fe1c40cc6483@FreeBSD.org> In-Reply-To: <20161216173930.GD90401@zxy.spb.ru> References: <CAMwkeZznenmN1RkUaKZ7i12F0FA185ZH%2BcHPXUp56S8j3SrubQ@mail.gmail.com> <20161216173930.GD90401@zxy.spb.ru>
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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. Eric
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