From owner-freebsd-questions@FreeBSD.ORG Thu Dec 15 01:16:42 2011 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 9460E1065670 for ; Thu, 15 Dec 2011 01:16:42 +0000 (UTC) (envelope-from cyberleo@cyberleo.net) Received: from paka.cyberleo.net (paka.cyberleo.net [66.219.31.21]) by mx1.freebsd.org (Postfix) with ESMTP id 61DD48FC0A for ; Thu, 15 Dec 2011 01:16:42 +0000 (UTC) Received: from [172.16.44.4] (den.cyberleo.net [66.253.36.39]) by paka.cyberleo.net (Postfix) with ESMTPSA id 73FB028405; Wed, 14 Dec 2011 20:16:41 -0500 (EST) Message-ID: <4EE94A78.1030506@cyberleo.net> Date: Wed, 14 Dec 2011 19:16:40 -0600 From: CyberLeo Kitsana User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:8.0) Gecko/20111204 Thunderbird/8.0 MIME-Version: 1.0 To: lists@midsummerdream.org References: <4ED98E9F.9010401@midsummerdream.org> <4EDA489B.9060503@midsummerdream.org> <4EDA56A3.6090108@cyberleo.net> <4edb4b48.LvOhZvvsP1inJeps%perryh@pluto.rain.com> <4EE91308.8050300@midsummerdream.org> In-Reply-To: <4EE91308.8050300@midsummerdream.org> X-Enigmail-Version: 1.3.4 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: ryallsd@gmail.com, perryh@pluto.rain.com, freebsd-questions@freebsd.org Subject: Re: AHCI driver and static device names 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: Thu, 15 Dec 2011 01:16:42 -0000 On 12/14/2011 03:20 PM, Rob wrote: > Can glabels, gpt, and zfs all work together? I have a system where I > have disks with 4 gpt partitions. Partitions 2 and 3 are part of gmirror > arrays, and partition 4 is part of a zfs pool. glabel says it writes to > the end of the partition, which I believe zfs also writes to doesn't it? Yup. However, all nestable geoms protect their metadata (when it exists) by providing a device that is smaller, so any nested consumer never even sees the provider's metadata. The end of the glabel device to which zfs writes its metadata in your implied example is actually several sectors prior to the end of the device or partition to which glabel writes its metadata. Explicit glabels are not strictly necessary with the GPT partitioning scheme, since the glabel module can peek into the GPT data structure, extract label names from there, and automatically create appropriate /dev/gpt/ entries for those labels. -- Fuzzy love, -CyberLeo Technical Administrator CyberLeo.Net Webhosting http://www.CyberLeo.Net Furry Peace! - http://wwww.fur.com/peace/