Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262109AbUDJUyr (ORCPT ); Sat, 10 Apr 2004 16:54:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262113AbUDJUyr (ORCPT ); Sat, 10 Apr 2004 16:54:47 -0400 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:11146 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S262109AbUDJUyq (ORCPT ); Sat, 10 Apr 2004 16:54:46 -0400 Date: Sat, 10 Apr 2004 21:54:45 +0100 From: viro@parcelfarce.linux.theplanet.co.uk To: Andries Brouwer Cc: Szakacsits Szabolcs , fledely , linux-ntfs-dev@lists.sourceforge.net, linux-kernel@vger.kernel.org Subject: Re: Accessing odd last partition sector (was: [Linux-NTFS-Dev] mkntfs dirty volume marking) Message-ID: <20040410205445.GV31500@parcelfarce.linux.theplanet.co.uk> References: <001601c41db7$aa0a02e0$0100000a@p667> <20040410202937.GB1909@wsdw14.win.tue.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040410202937.GB1909@wsdw14.win.tue.nl> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 922 Lines: 18 On Sat, Apr 10, 2004 at 10:29:37PM +0200, Andries Brouwer wrote: > On Fri, Apr 09, 2004 at 01:38:51PM +0200, Szakacsits Szabolcs wrote: > > > > TODO.ntfsprogs conatins the following TODO item under mkntfs: > > > - We don't know what the real last sector is, thus we mark the volume > > > dirty and the subsequent chkdsk (which will happen on reboot into > > > Windows automatically) recreates the backup boot sector if the Linux > > > kernel lied to us about the number of sectors. > > The ioctl BLKGETSIZE64 will tell you the size (in bytes) of a block device. So will lseek() to SEEK_END, actually (both 2.4 and 2.6). And yes, last sector _is_ accessible for dd(1) et.al. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/