From owner-freebsd-fs@FreeBSD.ORG Thu Sep 23 06:44:26 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 B0D3B1065672 for ; Thu, 23 Sep 2010 06:44:26 +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 6CC3C8FC12 for ; Thu, 23 Sep 2010 06:44:26 +0000 (UTC) Received: from edmwaa03.telusplanet.net ([66.183.53.162]) by priv-edmwes25.telusplanet.net (InterMail vM.7.09.01.00 201-2219-108-20080618) with ESMTP id <20100923064425.TZVT2238.priv-edmwes25.telusplanet.net@edmwaa03.telusplanet.net> for ; Thu, 23 Sep 2010 00:44:25 -0600 Received: from oliver.bc.lan (d66-183-53-162.bchsia.telus.net [66.183.53.162]) by edmwaa03.telusplanet.net (BorderWare Security Platform) with ESMTP id 5AA81376EBF00E5F for ; Thu, 23 Sep 2010 00:44:25 -0600 (MDT) Received: from [10.111.111.112] (unknown [10.111.111.112]) by oliver.bc.lan (Postfix) with ESMTP id 198806455 for ; Wed, 22 Sep 2010 23:44:25 -0700 (PDT) Message-ID: <4C9AF748.1000801@telus.net> Date: Wed, 22 Sep 2010 23:44:24 -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 References: <4C99DB46.1020308@telus.net> In-Reply-To: <4C99DB46.1020308@telus.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Cloudmark-Analysis: v=1.1 cv=lyV+XRjCp92gjFJjEBGdd+uk4cCEHFcEmNbKezYOog0= c=1 sm=0 a=xiDSYVbS4m4A:10 a=8nJEP1OIZ-IA:10 a=HNgjH8kF64GtJ7EcXKEMsQ==:17 a=8pif782wAAAA:8 a=_PVBLat-Bp3SsfXtALgA:9 a=XX2tv2Cs97AWHLjOSG4A:7 a=_MeWDVspvEG2nbrt4HeTRPcHs8sA:4 a=wPNLvfGTeEIA:10 a=uksCwDLimwtdvGab:21 a=lSjJdf9Z17SUZsNX:21 a=HpAAvcLHHh0Zw7uRqdWCyQ==:117 Subject: Re: 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: Thu, 23 Sep 2010 06:44:26 -0000 On 2010-09-22 3:32 AM, Carl wrote: > 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? Anyone know the GUID I need to use? Since posting the question I've been trying in vain to find a document listing all known GPT partition type GUIDs. Apple claims it's in the UEFI specification, but it isn't. The largest list is in this Wikipedia article: http://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs which provides no references as to where most of the list contents come from. How and by who did the FreeBSD GUIDs get defined? Are there more than appear in that Wikipedia article? Is there no governing body/publication for this sort of thing? Carl / K0802647