From owner-freebsd-questions@FreeBSD.ORG Fri Feb 5 22:10:53 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 E3B33106566B for ; Fri, 5 Feb 2010 22:10:53 +0000 (UTC) (envelope-from modulok@gmail.com) Received: from mail-pz0-f204.google.com (mail-pz0-f204.google.com [209.85.222.204]) by mx1.freebsd.org (Postfix) with ESMTP id B93FD8FC0C for ; Fri, 5 Feb 2010 22:10:53 +0000 (UTC) Received: by pzk42 with SMTP id 42so1843207pzk.8 for ; Fri, 05 Feb 2010 14:10:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=fZMDO0OUlLQgl9okfu7wzIx0Q4QMRtRXwUmNTA2ADZo=; b=XKWOdyATd5oPU6SE8M24tqGJXrX5WzVhpQE6gc4/T+xVE5dbAVZNEiuqRVfZYnsrAd SzGUMy6RiomgrAV2T0WRyd2gpO/1F8VQi8Mr3Thu99mAvG7Nfandj7vFztfoF2Vp0iji vihOclRCN1n7zm9xgMrZkMWLkGWpawdJiKnlE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=gihw+xtrhMhCMfT22gUqDorUE3ACdPiUatlpa44Upw1QkWXNmipeSpvznQB16sc4w6 B7pLyVxpR1bvAAPQBzoNcq7BsFIQvLO8J5lmCfMrDy5Gjd1N3RQDLggQY32ktmlZJuew PsLYpZQ5fKvQ1n/SqTTXyF9Queg6AgWQJkSEU= MIME-Version: 1.0 Received: by 10.142.150.41 with SMTP id x41mr2107157wfd.306.1265407853214; Fri, 05 Feb 2010 14:10:53 -0800 (PST) In-Reply-To: <201002052134.15945.jmc-freebsd2@milibyte.co.uk> References: <201001152334.52978.jmc-freebsd2@milibyte.co.uk> <201001172122.15128.jmc-freebsd2@milibyte.co.uk> <4B538459.7090601@infracaninophile.co.uk> <201002052134.15945.jmc-freebsd2@milibyte.co.uk> Date: Fri, 5 Feb 2010 15:10:52 -0700 Message-ID: <64c038661002051410y5dbb2b3fodb6addf5d13a1451@mail.gmail.com> From: Modulok To: Mike Clarke Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: freebsd-questions@freebsd.org 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 22:10:54 -0000 >> Does gmirror consider one of the consumers to act as a "master" for the = pair? No. The order doesn't matter. You could take out your hard drives and shuffle them like cards and it wouldn't matter. All metadata is stored in the last sector of the drives themselves. Cable order is irrelevant. -Modulok- On 2/5/10, Mike Clarke wrote: > 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 > 4 slices without any problems. > > But just one last dumb question. Does gmirror consider one of the > consumers to act as a "master" for the pair? The reason I ask is that > earlier today I needed to disconnect a few cables inside the PC to get > better access to a bit of internal hardware and then realised that > although I knew which two SATA connectors to use for the mirror drives > I'd failed to make a note of which order the drives were connected. I > felt about 75% sure I'd paired them up the same way as before so went > ahead, everything started up OK and "gmirror status" shows the status > for both mirrors as "COMPLETE". Now I'm wondering if I was just lucky > or if it just doesn't matter if the order of mirror consumers is > interchanged after creation. > > -- > Mike Clarke > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.o= rg" >