From owner-freebsd-fs@FreeBSD.ORG Wed Sep 22 10:32:41 2010 Return-Path: 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 1E787106564A for ; Wed, 22 Sep 2010 10:32:41 +0000 (UTC) (envelope-from k0802647@telus.net) Received: from defout.telus.net (defout.telus.net [204.209.205.13]) by mx1.freebsd.org (Postfix) with ESMTP id D11C38FC17 for ; Wed, 22 Sep 2010 10:32:40 +0000 (UTC) Received: from edmwaa02.telusplanet.net ([66.183.53.162]) by priv-edmwes25.telusplanet.net (InterMail vM.7.09.01.00 201-2219-108-20080618) with ESMTP id <20100922103239.JZPA2238.priv-edmwes25.telusplanet.net@edmwaa02.telusplanet.net> for ; Wed, 22 Sep 2010 04:32:39 -0600 Received: from oliver.bc.lan (d66-183-53-162.bchsia.telus.net [66.183.53.162]) by edmwaa02.telusplanet.net (BorderWare Security Platform) with ESMTP id 8C700274A7BFCC24 for ; Wed, 22 Sep 2010 04:32:39 -0600 (MDT) Received: from [10.111.111.112] (unknown [10.111.111.112]) by oliver.bc.lan (Postfix) with ESMTP id 4186462A4 for ; Wed, 22 Sep 2010 03:32:39 -0700 (PDT) Message-ID: <4C99DB46.1020308@telus.net> Date: Wed, 22 Sep 2010 03:32:38 -0700 From: Carl User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.9) Gecko/20100825 Lightning/1.0b2 Thunderbird/3.1.3 MIME-Version: 1.0 To: freebsd-fs@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Cloudmark-Analysis: v=1.1 cv=yW7ehx59SWrPX9sFlBd+WpMW8w65YBckkgKgQrm99nA= c=1 sm=0 a=GFxPKaE9UbsA:10 a=8nJEP1OIZ-IA:10 a=HNgjH8kF64GtJ7EcXKEMsQ==:17 a=AuW3WSKaGibjtbeclFUA:9 a=8QHv6hcEhYCPRbVTHZ8A:7 a=Z6IJy-j2A0lvA9Tov9TKb3zlSBMA:4 a=wPNLvfGTeEIA:10 a=HpAAvcLHHh0Zw7uRqdWCyQ==:117 X-Mailman-Approved-At: Wed, 22 Sep 2010 11:19:34 +0000 Subject: GPT partition type (GUID) for (g)journal provider partition X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 22 Sep 2010 10:32:41 -0000 I am using GPT for disk layout and I wish to use a dedicated partition for a gjournal journal provider rather than combining the data and journal into the same provider/partition. The question is this: What partition type (GUID) do I use for the journal partition? The gpart(8) man page lists a number of symbolic names for different FreeBSD partition types, but none seem appropriate for the task. For those that wonder, my reason for separating data and journal is that I am hoping to make up a little bit of the tremendous performance hit that gjournal causes by locating a journal provider in the fastest region of the disk even though its corresponding data provider must necessarily be located in the slower region of the disk. Is there a flaw in that thinking? Carl / K0802647