From owner-freebsd-questions@FreeBSD.ORG Mon Feb 24 22:15:19 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id DED416A4 for ; Mon, 24 Feb 2014 22:15:19 +0000 (UTC) Received: from mail-oa0-f46.google.com (mail-oa0-f46.google.com [209.85.219.46]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id A46511D03 for ; Mon, 24 Feb 2014 22:15:19 +0000 (UTC) Received: by mail-oa0-f46.google.com with SMTP id l6so1147053oag.19 for ; Mon, 24 Feb 2014 14:15:13 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=m2qwlc+sEBIOYiALLSqXiGHmTorZqcEyO9GwC8+BrOU=; b=myUQa4NQDp+cZR03Jz0D86mW2Z0iYrMmgZihHffXFK76WagmciScoz0XzVA7Q4xkj5 DB0kWLodO+QYBjmwnFIA4Ed7GKuN3yUKRIfEH48wQZtGAyurE9wDDPULxCtGWuUOa8/p VMcCPjPeNLqaFNnCfR6yGNp5GeboZo5hozVLZWa4eIMD1EP8IC6o/YwqBkvP7yy0QSuu HwadrPoTkok9bCC4I3pNUiT/vdBQ9lv/aTyIul+M+KCb2VaOV5z7ohmEOu3opIOvv38B qXOL65rXFPtkYrsBchTofSRGfo5c3p+pxOUoxGBHfFUpXDHtZZ9M6/zXXuLkZ8YLiwRA uHlA== X-Gm-Message-State: ALoCoQnWrT3qV6VP/4YU8dnMAAx9uULcz7e3/YPIyZCQf2eOUsi4XP60xUtVhc4gxi1lX2j7kHZ8 MIME-Version: 1.0 X-Received: by 10.182.156.44 with SMTP id wb12mr19720577obb.23.1393280113432; Mon, 24 Feb 2014 14:15:13 -0800 (PST) Received: by 10.60.17.41 with HTTP; Mon, 24 Feb 2014 14:15:13 -0800 (PST) In-Reply-To: References: Date: Mon, 24 Feb 2014 17:15:13 -0500 Message-ID: Subject: Re: gptids are not symlinks to /dev/da* From: Michael Sierchio To: Chris Stankevitz Content-Type: text/plain; charset=ISO-8859-1 Cc: FreeBSD Questions X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 24 Feb 2014 22:15:19 -0000 On Mon, Feb 24, 2014 at 4:50 PM, Chris Stankevitz wrote: > Okay, although I am a bit surprised to hear that a GPTID refers to a > partition. I'm using FreeNAS and I thought I instructed the zpool to > consist entirely of unpatitioned disks. I gather that FreeNAS is, > somewhere in the process, creating partitions which triggers > "structure creation" which creates unique GPTIDs. It is an unfortunate feature of FreeNAS - it creates gpart tables and reserves 2GB of every single disk for swap, leaving the rest for your use (as part of a ZFS pool, for example). That's a flawed assumption, which makes it less useful for enterprise deployment. My box has 48 drives, and I know where they are, and I don't want a disk to have an identity other than its position in the array. Doubly annoying because ZFS really performs better when you present whole, raw disk devices to it instead of partitions. - M