Date: Tue, 31 Jan 2017 07:35:07 -0700 From: Warner Losh <imp@bsdimp.com> To: Andreas Nilsson <andrnils@gmail.com> Cc: krad <kraduk@gmail.com>, FreeBSD Stable <freebsd-stable@freebsd.org>, Aristedes Maniatis <ari@ish.com.au> Subject: Re: Boot partition size Message-ID: <CANCZdfqfN7vRrRrJd8bdSmo1Bwx0btGdMEopkbzqxGEfyMkmBQ@mail.gmail.com> In-Reply-To: <CAPS9%2BSvGaHzf%2BwEJqsByOUtejAwkjppk%2BkEUEW_5cgtjnszsOA@mail.gmail.com> References: <a4cab85a-5e79-c7c1-fbb7-d9cf83cbf556@ish.com.au> <20170129141244.GA63867@in-addr.com> <CAOjFWZ6WRQ5i4OP5ZK89RxM1YpMbVp%2BcOHCSvUyUx0etizUmog@mail.gmail.com> <851efa44-0607-231f-0905-8f9c96a36237@ish.com.au> <CALfReyfwuuN_HQ_8iszwdpLJPCy-LagoeoEEBoXJnZW6sgus6Q@mail.gmail.com> <CAPS9%2BSvGaHzf%2BwEJqsByOUtejAwkjppk%2BkEUEW_5cgtjnszsOA@mail.gmail.com>
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The UEFI standard suggests something large like 100MB. There are a number of firmware updating programs that run as .efi images. It would be prudent to allow more than the bare minimum in case you wind up needing them down the line. boot1.efi is likely to grow significantly in the future. Maybe not 100x, a 1MB is likely once it has all the features it needs. 10MB might be a safe upper bound. Warner On Tue, Jan 31, 2017 at 7:00 AM, Andreas Nilsson <andrnils@gmail.com> wrote: > Well, 100mb might be relevant if you ever want to dual-boot. The relevant > efi file seems to be < 100k > > It may go up in size, but I doubt we will see a 100x increase. > > /A > > On Tue, Jan 31, 2017 at 1:03 PM, krad <kraduk@gmail.com> wrote: > >> Its worth noting you should also go for GPT layout and have a 100meg or so >> partition provisioned as well so you can do a uefi boot. Even if you arent >> going to use it right now. >> >> >> On 30 January 2017 at 03:41, Aristedes Maniatis <ari@ish.com.au> wrote: >> >> > On 30/1/17 2:20pm, Freddie Cash wrote: >> > > And, you may be able to do that on the existing disks, as ZFS now >> leaves >> > a MB or two of "slack space" at the end of the device used in the vdev. >> > This allows for using drives/partitions that are the same size in MB but >> > have different numbers of sectors. This was an issue on the early ZFS >> days. >> > > >> > > So, you may be able to resize the freebsd-zfs partition by a handful of >> > KB without actually changing the size of the vdev. >> > >> > >> > Brilliant, thank you. That worked a treat with a new boot size of 256k. >> > >> > >> > Note that this page: https://wiki.freebsd.org/ >> RootOnZFS/GPTZFSBoot/Mirror >> > needs to be adjusted. This line: >> > >> > gpart add -b 34 -s 128k -t freebsd-boot ad0 >> > >> > needs to instead be >> > >> > gpart add -a 4k -s 512k -t freebsd-boot ad0 >> > >> > >> > I don't have edit rights. Probably someone needs to clean up and merge >> > many of these pages: https://wiki.freebsd.org/RootOnZFS/ >> > >> > >> > Ari >> > >> > >> > >> > -- >> > --------------------------> >> > Aristedes Maniatis >> > CEO, ish >> > https://www.ish.com.au >> > GPG fingerprint CBFB 84B4 738D 4E87 5E5C 5EFA EF6A 7D2E 3E49 102A >> > >> > >> _______________________________________________ >> freebsd-stable@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-stable >> To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" >> > _______________________________________________ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
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