Date: Thu, 11 Feb 2021 16:43:57 -0800 From: Freddie Cash <fjwcash@gmail.com> To: "Russell L. Carter" <rcarter@pinyon.org> Cc: FreeBSD-Current <freebsd-current@freebsd.org> Subject: Re: upgrade stable/12 -> stable/13 zfs + boot partition Mediasize 64K Message-ID: <CAOjFWZ7VQOuNdwJ76vWCqpBSb5Cq18RYUQQXard6cAaQYnk=gg@mail.gmail.com> In-Reply-To: <CAOjFWZ57V_9Q1PUCnW8LM%2BLeQzRFgpFv8k_EynE19oWDa5d-YQ@mail.gmail.com> References: <ccc9862a-f6f6-f0c1-abd7-fd3bdd5a481f@pinyon.org> <CAOjFWZ57V_9Q1PUCnW8LM%2BLeQzRFgpFv8k_EynE19oWDa5d-YQ@mail.gmail.com>
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Sorry, meant 256 KB or 512 KB, not MB! On Thu, Feb 11, 2021 at 4:43 PM Freddie Cash <fjwcash@gmail.com> wrote: > On Thu, Feb 11, 2021 at 4:35 PM Russell L. Carter <rcarter@pinyon.org> > wrote: > >> Greetings, >> >> I really want to jump from stable/12 to stable/13 but one thing is >> causing a hesitancy. And that is, my main raidz2 system has >> a system boot zfs mirror pair that has boot partition size >> (Mediasize) of 64K, and when I tried to zpool upgrade that pool a >> year or 2 ago I got some scary message something like "boot >> partition size is not large enough". I asked about this on the >> lists but never received an answer. So, laziness required me >> to ignore the problem and not zpool upgrade any of my 15 or so >> zpools in the interim. >> >> A few weeks ago I tried to make buildworld/installworld upgrade >> 12->13 but the boot failed in the mounting filesystems phase with it >> couldn't find a bootable target. So after restoring 12 I decided >> to wait a bit. In the interim I have upgraded every zpool but that >> one system pool. All the other freebsd-boot partitions have a size >> of 512K. >> >> So what is the current advice? Is a freebsd-boot partition size >> of 64K laughably obsolete, and I should get with the program and >> repartition those disks, or can I march blindly into the upgrade? >> >> I guess I just want to understand where these sizes are going in >> the future. >> >> That is laughably small and you need to enter the 21st century. ;) > > I believe the recommendation is 256 MB or even 512 MB these days. > > If you partitioned your disks using "-a 1M" with gpart(8) for the > freebsd-zfs partition, then you'll have some slack space between it and the > freebsd-boot partition. Just delete the freebsd-boot partition and create a > larger one in it's place. I did something similar with some drives that > were part of a separate storage pool that I wanted to make bootable, by > creating a freebsd-boot partition in the slack space before the freebsd-zfs > partition. > > If you don't have that slack space at the front, you will need to detach > one of the drives from the mirror, re-partition it, then attach it back to > the mirror. Rinse and repeat for the other side. ZFS shouldn't notice the > pool is smaller by 1 MB (there's some internal slack space to allow you to > add drives that are labelled as the same size, but actually have different > numbers of sectors). > > Cheers, > Freddie > -- Freddie Cash fjwcash@gmail.com
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