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Date:      Wed, 06 Dec 2017 06:27:16 -0800
From:      "Zimbra Alertz" <no-reply@zimbra.com>
To:        freebsd-bugs@freebsd.org
Subject:   Dear freebsd-bugs@freebsd.org
Message-ID:  <20171206142830.DC10F8514895@mail.novaintermed.ro>

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Subject: [Bug 222425] GPT broken after "gpart backup ada0 | gpart restore -F
 ada1"
Date: Wed, 06 Dec 2017 15:59:24 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D222425

Warren Block <wblock@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |wblock@FreeBSD.org

--- Comment #10 from Warren Block <wblock@FreeBSD.org> ---
I'm seeing this also when trying to switch from a 64G to 200G virtual disk =
in a
VirtualBox VM.

If I use gpart backup | gpart recover to copy the partition information, th=
en
delete and recreate the later partitions as larger ones, then write the
bootcode, I get the

gptboot: invalid primary GPT header
gptboot: invalid backup GPT header
gptboot: unable to load GPT

flickering and repeating quickly on the VM console.  Rewriting the bootcode
again with gpart bootcode -b /boot/pmbr -p /boot/gptboot does not fix it, n=
or
does setting the disk active.  sha256 checksums on the boot partitions show=
ed
the working and non-working disks were identical.  gpart says the old and n=
ew
disk partition tables are valid, but the new one does not boot.

Doing a gpart destroy -F on the new disk and manually creating partitions a=
nd
writing bootcode works, and the drive boots normally.

I have not tested on physical hardware.

--=20
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