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Date:      Thu, 21 Mar 2019 06:32:54 +0000
From:      bugzilla-noreply@freebsd.org
To:        fs@FreeBSD.org
Subject:   [Bug 236504] [gmirror][UFS2] "Superblock check-hash failed" messages seen
Message-ID:  <bug-236504-3630-8ZYErgwcTy@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-236504-3630@https.bugs.freebsd.org/bugzilla/>
References:  <bug-236504-3630@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D236504

Mark Johnston <markj@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |markj@FreeBSD.org

--- Comment #9 from Mark Johnston <markj@FreeBSD.org> ---
I don't quite understand why the test is generating these errors in the fir=
st
place.  If the checksum is failing, it means that we saw the UFS2 magic num=
ber
in the superblock, so we're probably not looking at random garbage.  Is it
possible the taste is racing with synchronization of a new gmirror disk, and
seeing a partial write of a copied superblock?

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