From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from main.gmane.org ([80.91.229.2] helo=ciao.gmane.org) by canuck.infradead.org with esmtps (Exim 4.43 #1 (Red Hat Linux)) id 1Dn1jn-0004Kv-EN for linux-mtd@lists.infradead.org; Mon, 27 Jun 2005 18:05:58 -0400 Received: from list by ciao.gmane.org with local (Exim 4.43) id 1Dn1cV-00048S-Jc for linux-mtd@lists.infradead.org; Mon, 27 Jun 2005 23:58:29 +0200 Received: from halhoupro3.halliburton.com ([64.154.26.251]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 27 Jun 2005 23:58:23 +0200 Received: from sergei.sharonov by halhoupro3.halliburton.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 27 Jun 2005 23:58:23 +0200 To: linux-mtd@lists.infradead.org From: Sergei Sharonov Date: Mon, 27 Jun 2005 21:57:20 +0000 (UTC) Message-ID: References: <200506271409.42449.charles.tilbury@comcast.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: news Subject: Re: NAND flash question List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Charles, > I am using an ST Micro 64M byte x 8 bit flash part and JFFS2. It mostly works > except that when the board reboots, JFFS2 reports CRC error messages when the > partition mounts again. The strange part is that there does not seem to be > any data corruption or lost data. Also, I do not see any error messages > while reading and writing. However, the CRC errors seem to accumulate over > time. Is there some way to prevent this from happening? Repair it? Should > I just ignore it? In my experience these "errors" occur if you switch of the power without proper shutdown. They are not errors really, just notes from JFFS2 that some write was interrupted by power cycle or reset and the node written is invalid. It is annoying but harmless. I believe they eventually go away after the block is reclaimed by GC. Sergei