From owner-freebsd-geom@FreeBSD.ORG Mon Jan 29 16:28:49 2007 Return-Path: X-Original-To: freebsd-geom@FreeBSD.ORG Delivered-To: freebsd-geom@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id C6E7A16A406 for ; Mon, 29 Jan 2007 16:28:44 +0000 (UTC) (envelope-from mythtv@logic-q.nl) Received: from amsfep16-int.chello.nl (amsfep16-int.chello.nl [62.179.120.11]) by mx1.freebsd.org (Postfix) with ESMTP id 0FD1713C4A5 for ; Mon, 29 Jan 2007 16:28:43 +0000 (UTC) (envelope-from mythtv@logic-q.nl) Received: from mail.logic-q.nl ([89.98.181.67]) by amsfep11-int.chello.nl (InterMail vM.6.01.04.04 201-2131-118-104-20050224) with ESMTP id <20070129162830.FRXY1100.amsfep11-int.chello.nl@mail.logic-q.nl>; Mon, 29 Jan 2007 17:28:30 +0100 Received: from localhost (localhost.logic-q.nl [127.0.0.1]) by mail.logic-q.nl (Postfix) with ESMTP id 3387211767; Mon, 29 Jan 2007 17:28:30 +0100 (CET) X-Virus-Scanned: amavisd-new at logic-q.nl Received: from mail.logic-q.nl ([127.0.0.1]) by localhost (mail.logic-q.nl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id viKvjyzKNzs8; Mon, 29 Jan 2007 17:28:29 +0100 (CET) Received: from kotsbak (kotsbak [192.168.0.149]) by mail.logic-q.nl (Postfix) with SMTP id D0B0611752; Mon, 29 Jan 2007 17:28:29 +0100 (CET) From: "Hansa" To: , "freebsd geom" Date: Mon, 29 Jan 2007 17:28:38 +0100 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 In-Reply-To: <20070129153115.GA36446@keira.kiwi-computer.com> Importance: Normal Cc: Subject: RE: How do I gmirror slices? 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: Mon, 29 Jan 2007 16:28:50 -0000 > > Hmm... I dont think so... There is the first sector of the > disk, that is read > > by the BIOS, then there are 8KB somewhere at a fixed position > outside the file > > system... And I think those 8KB are already able to > understand/read UFS... :-) > > It's not really outside the file system, it appears at the > beginning of the > file system. It's 8KB for UFS1 and 64KB for UFS2. Not only > that, but that > 8K or 64K chunk is open/unused at the front of every superblock, that is: > for every cylinder group, IIRC. > Is that why fdisk doesn't touches the first 8/64KB before the first slice? Offset Size(ST) End Name PType Desc Subtype Flags 0 63 62 - 12 unused 0 63 12578832 12578894 ad4s1 8 freebsd 165 Regards, -Hansa