Zpool doesn't boot anymore after FreeBSD 12.1

[Sergey V. Dyatko]

On Thu, 22 Oct 2020 16:42:16 +0300
Andriy Gapon <avg at FreeBSD.org> wrote: 

> On 22/10/2020 16:39, Cassiano Peixoto wrote:
> > Hi Andriy,
> > 
> > I've just tried copying my zfsloader from 11.2-STABLE (R350026) to FreeBSD
> > 12.1 and 12.2 (STABLE) and fixed the issue.
> > 
> > I also tried to use zfsloader of 11.3 but didn't work and the same issue
> > happened.
> > 
> > So it seems that something has changed on zfsloader after 11.2 that brings
> > this issue.
> > 
> > My question is: Should it be expected or is it a bug to be fixed?
> >   
> 
> In my opinion it's a bug.
> zfsloader should not require that disks must be partitioned.
> 

+1
That's why I have terribly outdated 13-CURRENT on bunch of servers and can't
update them. 

Most of them look like this:
[tiger at st25]:~>zpool status
  pool: st25
 state: ONLINE
  scan: none requested
config:

        NAME        STATE     READ WRITE CKSUM
        st25       ONLINE       0     0     0
          mirror-0  ONLINE       0     0     0
            ada0    ONLINE       0     0     0
            ada1    ONLINE       0     0     0
          mirror-1  ONLINE       0     0     0
            ada2    ONLINE       0     0     0
            ada3    ONLINE       0     0     0
          mirror-2  ONLINE       0     0     0
            ada4    ONLINE       0     0     0
            ada5    ONLINE       0     0     0
          mirror-3  ONLINE       0     0     0
            ada6    ONLINE       0     0     0
            ada7    ONLINE       0     0     0

errors: No known data errors

They haven't separate boot device and have from 7 to 30+ Tb of data that I
can't backup anywhere for re-install server with disk partitioning. Some time
ago I managed to get aroud this reverting 2 commits (  r342151 + don't
remember revision) but then there where some other improvements after which I
lost the opportunity to revert this commits

--
wbr, Sergey