Re: RELENG_13 to 14 upgrade fail

On Thu, Nov 2, 2023 at 9:28 AM mike tancsa <mike@sentex.net> wrote:

> On one of my VMs that I upgraded from RELENG_13 to RELENG_14, I forgot
> to update the boot loader so now at bootup, I have
> ZFS: unsupported feature: com.klarasystems:vdev_zaps_v2
>
> Can't find /boot/zfsloader
>
> What is the best way to recover from this ? Its a raw vm image. gpart is
> p1=freebsd-boot, p2=freebsd-swap,p3=freebsd-zfs
>
> I was thinking perhaps start up a second vm thats RELENG_14, mdconfig
> the image, and then what do I need to do ? Just
>
> gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 md0 ?
>

Yes, note that if the host is running FreeBSD you can mdconfig the image on
the host directly and do it on the host too.

BTW. pmbr is very simple and doesn't change that often, updating gptzfsboot
should be sufficient.

Cheers,