From owner-freebsd-questions@FreeBSD.ORG Sun Oct 26 09:12:16 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EC9B4106566B for ; Sun, 26 Oct 2008 09:12:16 +0000 (UTC) (envelope-from k0802647@telus.net) Received: from outbound05.telus.net (outbound05.telus.net [199.185.220.224]) by mx1.freebsd.org (Postfix) with ESMTP id 9B3648FC18 for ; Sun, 26 Oct 2008 09:12:16 +0000 (UTC) (envelope-from k0802647@telus.net) Received: from priv-edtnaa06.telusplanet.net ([75.157.26.132]) by priv-edtnes90.telusplanet.net (InterMail vM.7.08.02.00 201-2186-121-20061213) with ESMTP id <20081026091215.OLIJ25082.priv-edtnes90.telusplanet.net@priv-edtnaa06.telusplanet.net> for ; Sun, 26 Oct 2008 03:12:15 -0600 Received: from oliver.bc.lan (d75-157-26-132.bchsia.telus.net [75.157.26.132]) by priv-edtnaa06.telusplanet.net (BorderWare Security Platform) with ESMTP id 18FE1811341BB0D7 for ; Sun, 26 Oct 2008 03:12:14 -0600 (MDT) Received: from [10.111.111.112] (unknown [10.111.111.112]) by oliver.bc.lan (Postfix) with ESMTP id 76EC5645D; Sun, 26 Oct 2008 02:12:14 -0700 (PDT) Message-ID: <4904346E.80907@telus.net> Date: Sun, 26 Oct 2008 02:12:14 -0700 From: Carl User-Agent: Thunderbird 2.0.0.17 (Windows/20080914) MIME-Version: 1.0 To: freebsd-questions@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: gmirror + subset of partitions gjournal'd, autosync setting? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Oct 2008 09:12:17 -0000 I've built a GEOM mirror on a single slice of a single disk and am about to insert the second disk. Of the partitions in the mirror, I made only a few of them gjournal'd. I've seen it recommended that one disable autosynchronization for the mirror if using journaled filesystems. 1. Is that recommendation a must or a nice-to-have? What are the actual consequences of not taking that advice? 2. In a case like mine, the non-journaled partitions need autosychronization enabled to benefit from being mirrored, right? 3. Exactly how would I disable autosynchronization for the journaled partitions in the mirror, but not for the rest? Carl / K0802647