From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Alexander E. Patrakov" Subject: Re: libata equivalent for hdX=remap63 Date: Sun, 02 Sep 2007 16:18:50 +0600 Message-ID: <46DA8E0A.2020503@ums.usu.ru> References: <46DA73B5.5010107@ums.usu.ru> <20070902104645.0c6b291c@the-village.bc.nu> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from relay4.usu.ru ([194.226.235.39]:54461 "EHLO relay4.usu.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755157AbXIBKRm (ORCPT ); Sun, 2 Sep 2007 06:17:42 -0400 Received: from relay4.usu.ru (localhost [127.0.0.1]) by relay4.usu.ru (PostSystem) with ESMTP id 8A3A517F38 for ; Sun, 2 Sep 2007 16:20:16 +0600 (YEKST) Received: from usu2.usu.ru (usu2.usu.ru [194.226.237.16]) by relay4.usu.ru (PostSystem) with ESMTP id D441217F38 for ; Sun, 2 Sep 2007 16:20:14 +0600 (YEKST) Received: from usu2.usu.ru (localhost.usu2.usu.ru [127.0.0.1]) by usu2.usu.ru (Postfix) with ESMTP id 74C2BA7EBA for ; Sun, 2 Sep 2007 16:17:38 +0600 (YEKST) Received: from ums.usu.ru (ums.usu.ru [194.226.236.116]) by usu2.usu.ru (Postfix) with ESMTP id 08E62A7E95 for ; Sun, 2 Sep 2007 16:17:38 +0600 (YEKST) In-Reply-To: <20070902104645.0c6b291c@the-village.bc.nu> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Alan Cox Cc: linux-ide@vger.kernel.org, Mauelshagen@RedHat.com Alan Cox wrote: > On Sun, 02 Sep 2007 14:26:29 +0600 > "Alexander E. Patrakov" wrote: > > >> Hello, >> >> sorry if this is a FAQ, but googling for "libata remap63" gives nothing >> useful. >> >> Some old computers need software like "Ontrack Disk Manager" in order to >> see large disks in the other OS. The way to deal with such setup in >> Linux was to add "hdX=remap63" to the kernel arguments. However, I >> cannot find the equivalent of this option in the new libata-based >> drivers. Could you please show how to migrate such systems to libata >> without removing the disk manager? >> > > The remap63 hack is ancient. Since the kernel acquired device mapper its > also unneccessary as you can use device mapper to set up a 63 sector > offset volume. > > I'm amazed anyone is still using it but the right way to handle it on a > vaguely modern system isn't more kernel hacks but to teach dmraid to > handle it. If you've got an example of what the layout looks like > (especially if there is a way to autodetect it) then talk to Heinz (cc'd) > about getting it added to dmraid. > Thanks Alan, this is actually not my system, but a system of a user of my Live CD. I already asked him to mail me the first megabyte of his hard disk, but let me wait 24 hours for a reply. Would this information be enough for adding support for this into dmraid? As for autodetection, I am really not sure. The user says that kernels prior to 2.5.70 had this autodetection built-in. -- Alexander E. Patrakov