From owner-freebsd-fs@FreeBSD.ORG  Thu Apr 22 17:58:32 2010
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
Delivered-To: freebsd-fs@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 417E21065670
	for <freebsd-fs@freebsd.org>; Thu, 22 Apr 2010 17:58:32 +0000 (UTC)
	(envelope-from martin@lispworks.com)
Received: from lwfs1-cam.cam.lispworks.com (mail.lispworks.com
	[193.34.186.230])
	by mx1.freebsd.org (Postfix) with ESMTP id D1DD48FC13
	for <freebsd-fs@freebsd.org>; Thu, 22 Apr 2010 17:58:31 +0000 (UTC)
Received: from higson.cam.lispworks.com
	(IDENT:U2FsdGVkX19/evk8VwkVkVD7Dil+/egORU8IiMP5cJ0@higson
	[192.168.1.7])
	by lwfs1-cam.cam.lispworks.com (8.12.9p2/8.12.9) with ESMTP id
	o3MHwTQc027658; Thu, 22 Apr 2010 18:58:29 +0100 (BST)
	(envelope-from martin@lispworks.com)
Received: from higson.cam.lispworks.com by higson.cam.lispworks.com (8.13.1)
	id o3MHwTZl006550; Thu, 22 Apr 2010 18:58:29 +0100
Received: (from martin@localhost)
	by higson.cam.lispworks.com (8.13.1/8.13.1/Submit) id o3MHwTb2006547;
	Thu, 22 Apr 2010 18:58:29 +0100
Date: Thu, 22 Apr 2010 18:58:29 +0100
Message-Id: <201004221758.o3MHwTb2006547@higson.cam.lispworks.com>
From: Martin Simmons <martin@lispworks.com>
To: freebsd-fs@freebsd.org
In-reply-to: <4BD0670A.8070205@xpam.de> (message from Adam Nowacki on Thu, 22
	Apr 2010 17:11:06 +0200)
References: <201004221441.PAA07296@wratting.cam.lispworks.com>
	<4BD0670A.8070205@xpam.de>
Subject: Re: zfs: unexpected resilver of old disk when attaching a new mirror
 disk
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 22 Apr 2010 17:58:32 -0000

>>>>> On Thu, 22 Apr 2010 17:11:06 +0200, Adam Nowacki said:
> 
> My best guess is metadata updates to refer to the 2nd disk. I've seen 
> same behavior when replacing a bad disk in 10 disk raidz2 pool. No data 
> was affected.

I would expect all new writes to automatically go to all disks though, so they
wouldn't be counted as resilvering.

__Martin