From owner-freebsd-stable@freebsd.org  Tue Nov 22 08:37:17 2016
Return-Path: <owner-freebsd-stable@freebsd.org>
Delivered-To: freebsd-stable@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id F08E2C4F071
 for <freebsd-stable@mailman.ysv.freebsd.org>;
 Tue, 22 Nov 2016 08:37:17 +0000 (UTC)
 (envelope-from petefrench@ingresso.co.uk)
Received: from constantine.ingresso.co.uk
 (ingresso-1-pt.tunnel.tserv1.lon2.ipv6.he.net [IPv6:2001:470:1f1c:411::2])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id BB524DD6;
 Tue, 22 Nov 2016 08:37:17 +0000 (UTC)
 (envelope-from petefrench@ingresso.co.uk)
Received: from dilbert.london-internal.ingresso.co.uk ([10.64.50.6]
 helo=dilbert.ingresso.co.uk)
 by constantine.ingresso.co.uk with esmtps
 (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87 (FreeBSD))
 (envelope-from <petefrench@ingresso.co.uk>)
 id 1c96Zn-000IQk-Vg; Tue, 22 Nov 2016 08:37:16 +0000
Received: from petefrench by dilbert.ingresso.co.uk with local (Exim 4.87
 (FreeBSD)) (envelope-from <petefrench@ingresso.co.uk>)
 id 1c96Zn-0004u8-Tl; Tue, 22 Nov 2016 08:37:15 +0000
To: gpalmer@freebsd.org, petefrench@ingresso.co.uk
Subject: Re: Help! two machines ran out of swap and corrupted their zpools!
Cc: freebsd-stable@freebsd.org
In-Reply-To: <20161121182958.GC99344@in-addr.com>
Message-Id: <E1c96Zn-0004u8-Tl@dilbert.ingresso.co.uk>
From: Pete French <petefrench@ingresso.co.uk>
Date: Tue, 22 Nov 2016 08:37:15 +0000
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-stable>, 
 <mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable/>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
 <mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 22 Nov 2016 08:37:18 -0000

> Silly question - have you checked that the swap partition does not
> overlap your boot pool partition?  It could well be that the end of
> the swap partition intrudes into the affected ZFS pool

Interesting idea - all partitons were created with gpart add -a 8
but I have explictly checked, and I cant currently access the drives.
Was there eer a bug in gpart which could cause this that you can
remember ? The drives are GPT partitoned.

When I gte the drives back online on a system I will check this though, thanks

-pete.