From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from deferred.serv4.aus.datafoundry.com ([209.99.125.43]) by pentafluge.infradead.org with esmtp (Exim 4.63 #1 (Red Hat Linux)) id 1IdAz0-0004gn-M8 for linux-mtd@lists.infradead.org; Wed, 03 Oct 2007 21:38:19 +0100 Received: from residential.serv4.aus.datafoundry.com (residential.serv4.aus.datafoundry.com [209.99.125.41]) by deferred.serv4.aus.datafoundry.com (Postfix) with ESMTP id 713BE344D43 for ; Wed, 3 Oct 2007 14:33:57 -0500 (CDT) Received: from localhost (mw-mail.datafoundry.com [209.99.127.23]) by residential.serv4.aus.datafoundry.com (Postfix) with ESMTP id CD1931BC051 for ; Wed, 3 Oct 2007 14:33:02 -0500 (CDT) Message-ID: <1191439970.4703ee62083f1@webmail.texas.net> Date: Wed, 03 Oct 2007 14:32:50 -0500 From: catboat@texas.net To: linux-mtd@lists.infradead.org Subject: bit flip MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hello all, A NAND card flipped a bit and caused a data CRC problem in a data node. When I cat the file, this region is zeroes. cat exits with rc 0. I can simulate this. I made a jffs2 file system using mkfs.jffs2. In a file with multiple data nodes, I manually flip a bit in one of them. At mount time, I see a printk about it. cat exits with 0 and the file has a chunk of zeroes in it. Seems incorrect to me. I expected jffs2 to return EIO somewhere. Does it seem incorrect to you? Monte Copeland IBM Austin