From owner-freebsd-current Sun May 12 11:36: 0 2002 Delivered-To: freebsd-current@freebsd.org Received: from albatross.prod.itd.earthlink.net (albatross.mail.pas.earthlink.net [207.217.120.120]) by hub.freebsd.org (Postfix) with ESMTP id CEA2B37B40C for ; Sun, 12 May 2002 11:35:50 -0700 (PDT) Received: from pool0083.cvx40-bradley.dialup.earthlink.net ([216.244.42.83] helo=mindspring.com) by albatross.prod.itd.earthlink.net with esmtp (Exim 3.33 #2) id 176yCC-0006UR-00; Sun, 12 May 2002 11:35:48 -0700 Message-ID: <3CDEB5E6.17F4509B@mindspring.com> Date: Sun, 12 May 2002 11:35:18 -0700 From: Terry Lambert X-Mailer: Mozilla 4.7 [en]C-CCK-MCD {Sony} (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Szilveszter Adam Cc: freebsd-current@freebsd.org Subject: Re: Special fx with disklabel(8)? References: <20020512182347.GD613@fonix.adamsfamily.xx> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG DOS partition tables use a 24b C/H/S value. With 512B sectors, this means they are incapable of representing more than 8G of disk space. To support a 32b sector offset, you have to go to LBA mode. This isn't really supported by any BIOS that still respects the C/H/S offsets, since they will override. What probably happened is that you had an overflow that wrapped you back to the start of the disk. The general answer on this is: use "dangerously dedicated mode for very large disks". It's possible to work around this, but it's really a pain, and you have to know what you are doing. Chapter 5 of the PReP specification has an excellent tutorial on LBA addressing and DOS partition tables (much better than any Intel related information I have seen to date), if you want to fix this problem, rather than just ignoring it. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message