From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755232AbYLBOss (ORCPT ); Tue, 2 Dec 2008 09:48:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754925AbYLBOsh (ORCPT ); Tue, 2 Dec 2008 09:48:37 -0500 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:33505 "EHLO UNKNOWN" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754911AbYLBOsg (ORCPT ); Tue, 2 Dec 2008 09:48:36 -0500 Date: Tue, 2 Dec 2008 15:48:30 +0100 From: Pavel Machek To: kernel list Cc: tytso@mit.edu Subject: SD/MMC cards: how crappy they are? Message-ID: <20081202144830.GB1549@ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I have 32GB card here... root@amd:/home/pavel/WWW/wear/tinylight# time cat /dev/mmc1 > /dev/null cat: /dev/mmc1: Input/output error 1.32user 49.03system 4184.78 (69m44.789s) elapsed 1.20%CPU ...maybe it was because of powerfail? I'll try to run badblocks to recover it... ...I did. Badblocks did not help, but cat /dev/zero > /dev/mmc1 did.. And yes, thosse 'temporarily bad blocks' seem very much powerfail related. Its bad, because ext2/3 does not seem to handle this very well... not even fsck does the selective rewrite... :-(. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html