From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-fx0-f49.google.com ([209.85.161.49]) by canuck.infradead.org with esmtps (Exim 4.72 #1 (Red Hat Linux)) id 1Pnuh6-0008SD-9C for linux-mtd@lists.infradead.org; Fri, 11 Feb 2011 15:14:01 +0000 Received: by fxm19 with SMTP id 19so2874426fxm.36 for ; Fri, 11 Feb 2011 07:13:58 -0800 (PST) Subject: Re: Testing a device using mtd_stresstest From: Artem Bityutskiy To: David Peverley In-Reply-To: References: <1297002281.4460.6.camel@localhost> Content-Type: text/plain; charset="UTF-8" Date: Fri, 11 Feb 2011 17:12:49 +0200 Message-ID: <1297437169.2760.54.camel@localhost> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Cc: linux-mtd@lists.infradead.org Reply-To: dedekind1@gmail.com List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Mon, 2011-02-07 at 13:44 +0000, David Peverley wrote: > I'm not sure what the implication of this is ; I understand that this > will cause the subpage test to fail with CONFIG_MTD_NAND_VERIFY_WRITE > enabled. However, the FAQ I had discounted as we use YAFFS2 and not > UBIFS. Given that should I still disable the write verify? At the > moment I'm inclined to leave it enabled as it seems to be regularly > catching failures that should not occur, such as the stress-test > failures noted. I do not know YAFFS, ask Charles, but I _think_ YAFFS does not use sub-pages, so you han have that option enabled. For sure, if you do not use sub-pages and it catches problems - have it enabled and nail the problems down. > We've also noticed that every so often we see "uncorrectable error:" > messages from nand_ecc.c - do you have any suggestions as to where to > start investigating here? So far I can't find a pattern to occurrences > or a regular way to reproduce. Not really - this can be incorrect timings or bad HW. I cannot give you good suggestions. -- Best Regards, Artem Bityutskiy (Артём Битюцкий)