From owner-freebsd-geom@FreeBSD.ORG Thu Dec 2 11:30:51 2010 Return-Path: Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DE7551065672 for ; Thu, 2 Dec 2010 11:30:51 +0000 (UTC) (envelope-from bruce@cran.org.uk) Received: from muon.cran.org.uk (muon.cran.org.uk [IPv6:2a01:348:0:15:5d59:5c40:0:1]) by mx1.freebsd.org (Postfix) with ESMTP id 73AD88FC19 for ; Thu, 2 Dec 2010 11:30:51 +0000 (UTC) Received: from muon.cran.org.uk (localhost [127.0.0.1]) by muon.cran.org.uk (Postfix) with ESMTP id C0AD7E60D0; Thu, 2 Dec 2010 11:30:50 +0000 (GMT) Received: from unknown (client-86-31-8-12.midd.adsl.virginmedia.com [86.31.8.12]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by muon.cran.org.uk (Postfix) with ESMTPSA; Thu, 2 Dec 2010 11:30:49 +0000 (GMT) Date: Thu, 2 Dec 2010 11:30:35 +0000 From: Bruce Cran To: perryh@pluto.rain.com Message-ID: <20101202113035.00005e38@unknown> In-Reply-To: <4cf77e11.P9UAmLzg7xenh4WP%perryh@pluto.rain.com> References: <4cf21cd3.UbQ57eYkszW60Ww4%perryh@pluto.rain.com> <4CF34297.4070300@yandex.ru> <4cf35138.VleaJCYj4z5kd9WX%perryh@pluto.rain.com> <4CF35809.6050704@yandex.ru> <4cf367ff.58BO71PlaI7w0e4r%perryh@pluto.rain.com> <4cf4d374.ej1zPKXBMjtfSPzw%perryh@pluto.rain.com> <4CF4EDC2.4030907@yandex.ru> <4cf6148d./XPrjnaBP5xeKIEf%perryh@pluto.rain.com> <4CF62851.2080502@yandex.ru> <4cf77e11.P9UAmLzg7xenh4WP%perryh@pluto.rain.com> X-Mailer: Claws Mail 3.7.6 (GTK+ 2.16.0; i586-pc-mingw32msvc) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: bu7cher@yandex.ru, xcllnt@mac.com, freebsd-geom@freebsd.org Subject: Re: G_PART macro definitions X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 02 Dec 2010 11:30:51 -0000 On Thu, 02 Dec 2010 03:08:01 -0800 perryh@pluto.rain.com wrote: > I'm not sure where I first got the impression that not all BIOS > can handle GPT, but the most recent apparent confirmation was here: > http://lists.freebsd.org/pipermail/freebsd-questions/2010-September/221669.html I was also under the impression that 'legacy' BIOSes couldn't boot from GPT, while EFI requires it. The part I'd missed was that FreeBSD installs a Protective MBR which means that the BIOS doesn't need to know anything about GPT to boot it (http://en.wikipedia.org/wiki/GUID_Partition_Table#Legacy_MBR_.28LBA_0.29). -- Bruce Cran