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Date:      Sat, 9 Feb 2019 16:30:57 -0600
From:      Karl Denninger <karl@denninger.net>
To:        freebsd-stable@freebsd.org
Subject:   Serious ZFS Bootcode Problem (GPT NON-UEFI)
Message-ID:  <911d001f-9e33-0521-51fe-f7d1383dfc62@denninger.net>

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FreeBSD 12.0-STABLE r343809

After upgrading to this (without material incident) zfs was telling me
that the pools could be upgraded (this machine was running 11.1, then 11.=
2.)

I did so, /and put the new bootcode on with gpart bootcode -b /boot/pmbr
-p /boot/gptzfsboot -i .... da... /on both of the candidate (mirrored
ZFS boot disk) devices, in the correct partition.

Then I rebooted to test and..... /could not find the zsboot pool
containing the kernel./

I booted the rescue image off my SD and checked -- the copy of
gptzfsboot that I put on the boot partition is exactly identical to the
one on the rescue image SD.

Then, to be /absolutely sure /I wasn't going insane I grabbed the
mini-memstick img for 12-RELEASE and tried THAT copy of gptzfsboot.

/Nope; that won't boot either!/

Fortunately I had a spare drive slot so I stuck in a piece of spinning
rust, gpart'ed THAT with an old-style UFS boot filesystem, wrote
bootcode on that, mounted the ZFS "zsboot" filesystem and copied it
over.=C2=A0 That boots fine (of course) and mounts the root pool, and off=
 it
goes.

I'm going to blow away the entire /usr/obj tree and rebuild the kernel
to see if that gets me anything that's more-sane, but right now this
looks pretty bad.

BTW just to be absolutely sure I blew away the entire /usr/obj directory
and rebuilt -- same size and checksum on the binary that I have
installed, so.....

Not sure what's going on here -- did something get moved?

--=20
Karl Denninger
karl@denninger.net <mailto:karl@denninger.net>
/The Market Ticker/
/[S/MIME encrypted email preferred]/

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