From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.nokia.com ([131.228.20.173] helo=mgw-ext14.nokia.com) by canuck.infradead.org with esmtps (Exim 4.63 #1 (Red Hat Linux)) id 1HjEXH-00037i-Iv for linux-mtd@lists.infradead.org; Wed, 02 May 2007 09:06:25 -0400 Message-ID: <46388BF9.4060807@nokia.com> Date: Wed, 02 May 2007 16:02:49 +0300 From: Adrian Hunter MIME-Version: 1.0 To: ext David Woodhouse Subject: Re: JFFS2 wrong data CRC message References: <46385786.5020804@nokia.com> <1178108604.2875.182.camel@pmac.infradead.org> In-Reply-To: <1178108604.2875.182.camel@pmac.infradead.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: linux-mtd@lists.infradead.org List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , ext David Woodhouse wrote: > On Wed, 2007-05-02 at 12:19 +0300, Adrian Hunter wrote: >> Can someone explain why this message is not an error? >> >> JFFS2 notice: (17573) read_dnode: wrong data CRC in data node at >> 0x07e85800: read 0x86c6656c, calculated 0xaf4f2bc5. > > Because it's almost certainly harmless. It usually just means that you > rebooted or reset without cleanly unmounting -- and thus without the > writebuffer getting flushed to finish the node it was writing at the > time. So the data CRC fails, and the node is ignored. > Unfortunately I started with an empty flash and have not rebooted at all. I've been running stress tests constantly for about a week, and this is the only JFFS2 message. The tests do unmount and remount, but there are no error messages. So unless you can offer an alternative explanation I am going to have to assume it is an error.