From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265336AbUBPEKM (ORCPT ); Sun, 15 Feb 2004 23:10:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265339AbUBPEKL (ORCPT ); Sun, 15 Feb 2004 23:10:11 -0500 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:57242 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S265336AbUBPEKG (ORCPT ); Sun, 15 Feb 2004 23:10:06 -0500 Message-ID: <40304290.7090207@pobox.com> Date: Sun, 15 Feb 2004 23:09:52 -0500 From: Jeff Garzik User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030703 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Valdis.Kletnieks@vt.edu CC: Chip Salzenberg , Bartlomiej Zolnierkiewicz , Linux Kernel , Andrew Morton Subject: Re: Linux 2.6.3-rc3 - IDE DMA errors on Thinkpad A30 References: <200402151658.57710.bzolnier@elka.pw.edu.pl> <20040215163438.GC3789@perlsupport.com> <200402151808.42611.bzolnier@elka.pw.edu.pl> <20040216005523.GD3789@perlsupport.com> <40302783.6020505@pobox.com> <20040216033740.GE3789@perlsupport.com> <40303D59.4030605@pobox.com> <200402160358.i1G3wC6W013389@turing-police.cc.vt.edu> In-Reply-To: <200402160358.i1G3wC6W013389@turing-police.cc.vt.edu> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Valdis.Kletnieks@vt.edu wrote: > On Sun, 15 Feb 2004 22:47:37 EST, Jeff Garzik said: > >>One for the todo list, I suppose... a useable workaround for this is >>probably good ole 'e2fsck -c', i.e. badblocks... That says "check again >>to see if this sector is bad", and -hopefully- will unmark bad blocks >>that were incorrectly marked bad. > > > Does e2fsck/badblocks issue the right ioctls/etc to make the disk read the > *original* block, or will the disk simply check the *redirected* block? I'm not sure your question has meaning. Consider: ext2 reads sector 1234. drive returns "media error", and then swaps the bad sector for a good one. Reboot and run badblocks. badblocks reads sector 1234, in whatever manner the drive chooses to present sector 1234 to the OS. "original" versus "redirected" block is invisible to the OS. The OS only knows that an event occured at a single point in time -- the media error. Jeff