From owner-freebsd-arch@FreeBSD.ORG Thu Dec 4 23:08:21 2008 Return-Path: Delivered-To: arch@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 770301065673; Thu, 4 Dec 2008 23:08:21 +0000 (UTC) (envelope-from xcllnt@mac.com) Received: from asmtpout016.mac.com (asmtpout016.mac.com [17.148.16.91]) by mx1.freebsd.org (Postfix) with ESMTP id 628D18FC0C; Thu, 4 Dec 2008 23:08:21 +0000 (UTC) (envelope-from xcllnt@mac.com) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Received: from mdenny-t60.jnpr.net (natint3.juniper.net [66.129.224.36]) by asmtp016.mac.com (Sun Java(tm) System Messaging Server 6.3-7.03 (built Aug 7 2008; 32bit)) with ESMTPSA id <0KBD000ZSK9QUS30@asmtp016.mac.com>; Thu, 04 Dec 2008 15:08:15 -0800 (PST) Message-id: <5783CEB0-6163-429E-8B28-2F9D6FBCF4A8@mac.com> From: Marcel Moolenaar To: John Baldwin In-reply-to: <200812041313.34565.jhb@freebsd.org> Date: Thu, 04 Dec 2008 15:08:14 -0800 References: <20081203.193714.693830802.imp@bsdimp.com> <200812041313.34565.jhb@freebsd.org> X-Mailer: Apple Mail (2.929.2) Cc: FreeBSD Arch Subject: Re: RFC: making gpart default X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Dec 2008 23:08:21 -0000 On Dec 4, 2008, at 10:13 AM, John Baldwin wrote: > No, the way GPT works, you have a PMBR at sector 0, then immediately > following > that you have the Primary partition table in the next N sectors (the > first > sector in the table has a header that contains the size of the > table). Then > you have a backup Secondary partition table in the last N sectors of > the disk > as well. At least with the old gpt(8) tool you could actually tell > it how > big of a table to make when you created a GPT, and I imagine gpart > probably > can do the same. Yes. For schemes that support it, you can specify how many entries to allocate. The 34 corresponds to 128 entries for GPT (4 entries per sector)... -- Marcel Moolenaar xcllnt@mac.com