From owner-freebsd-questions@FreeBSD.ORG Fri Feb 5 21:34:19 2010 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 9F69E106566B for ; Fri, 5 Feb 2010 21:34:19 +0000 (UTC) (envelope-from jmc-freebsd2@milibyte.co.uk) Received: from relay.pcl-ipout02.plus.net (relay.pcl-ipout02.plus.net [212.159.7.100]) by mx1.freebsd.org (Postfix) with ESMTP id D19578FC14 for ; Fri, 5 Feb 2010 21:34:18 +0000 (UTC) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApoEAGodbEtUXebq/2dsb2JhbADXL4RUBA Received: from relay07.plus.net ([84.93.230.234]) by relay.pcl-ipout02.plus.net with ESMTP; 05 Feb 2010 21:34:17 +0000 Received: from [84.92.153.232] (helo=curlew.milibyte.co.uk) by relay07.plus.net with esmtp (Exim) id 1NdVoe-0003rs-Lp; Fri, 05 Feb 2010 21:34:16 +0000 Received: by curlew.milibyte.co.uk with local (Exim 4.71) (envelope-from ) id 1NdVoe-0000T9-1Q; Fri, 05 Feb 2010 21:34:16 +0000 From: Mike Clarke To: freebsd-questions@freebsd.org Date: Fri, 5 Feb 2010 21:34:15 +0000 User-Agent: KMail/1.9.10 References: <201001152334.52978.jmc-freebsd2@milibyte.co.uk> <201001172122.15128.jmc-freebsd2@milibyte.co.uk> <4B538459.7090601@infracaninophile.co.uk> In-Reply-To: <4B538459.7090601@infracaninophile.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Message-Id: <201002052134.15945.jmc-freebsd2@milibyte.co.uk> X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: jmc-freebsd2@milibyte.co.uk X-SA-Exim-Scanned: No (on curlew.milibyte.co.uk); SAEximRunCond expanded to false X-Plusnet-Relay: 9088fa74c0a55f299b443f0d923e7428 Cc: Subject: Re: Newbie gmirror questions 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: Fri, 05 Feb 2010 21:34:19 -0000 On Sunday 17 January 2010, Matthew Seaman wrote: > However, one of the really amazingly brilliant things about geom is > that just about any disk / storage related thing can be a geom > provider, and geom constructs will nest very happily. =A0Here's a howto > for setting up gmirror across a pair of slices: > > http://people.freebsd.org/~rse/mirror/ Thanks for all the advice, my mirrors are now up and running on 2 of the=20 4 slices without any problems. But just one last dumb question. Does gmirror consider one of the=20 consumers to act as a "master" for the pair? The reason I ask is that=20 earlier today I needed to disconnect a few cables inside the PC to get=20 better access to a bit of internal hardware and then realised that=20 although I knew which two SATA connectors to use for the mirror drives=20 I'd failed to make a note of which order the drives were connected. I=20 felt about 75% sure I'd paired them up the same way as before so went=20 ahead, everything started up OK and "gmirror status" shows the status=20 for both mirrors as "COMPLETE". Now I'm wondering if I was just lucky=20 or if it just doesn't matter if the order of mirror consumers is=20 interchanged after creation. =2D-=20 Mike Clarke