From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pd9eb9fe6.dip.t-dialin.net ([217.235.159.230] helo=thomas.tec.autronix.de) by pentafluge.infradead.org with esmtp (Exim 3.22 #1 (Red Hat Linux)) id 16b5gC-00039q-00 for ; Wed, 13 Feb 2002 20:07:00 +0000 Content-Type: text/plain; charset="iso-8859-1" From: Thomas Gleixner Reply-To: gleixner@autronix.de To: Lance Nakamura , David Woodhouse Subject: Re: NAND flash and JFFS(2) Date: Wed, 13 Feb 2002 21:19:47 +0100 Cc: linux-mtd@lists.infradead.org, jffs-dev@axis.com References: <03F65384200AD111936B0060B067AC7B030912AA@HNL-NT-MAIL1.verifone.com> In-Reply-To: <03F65384200AD111936B0060B067AC7B030912AA@HNL-NT-MAIL1.verifone.com> MIME-Version: 1.0 Message-Id: <0202132119470Z.00764@thomas> Content-Transfer-Encoding: 8bit Sender: linux-mtd-admin@lists.infradead.org Errors-To: linux-mtd-admin@lists.infradead.org List-Help: List-Post: List-Subscribe: , List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: On Wednesday, 13. February 2002 21:03, Lance Nakamura wrote: > 2 things: > 1) can the test be set to remove power more frequently, > as in every minute rather than every hour? our experience with > power fail safety is that you have to run at least 100K cycles, > > 2) an important test is to remove power while the file > system is trying to recover. in the real world, power failures > are rarely clean, isolated instances. you may get multiple failures in > as little as 1 second (failures a few hundred miliseconds apart). You're right, but this was a test for a big hack inside the fs. The power on/off was just a little addon. If we have finished some left issues i will setup a real power fail safety test. Thomas __________________________________________________ Thomas Gleixner, autronix automation GmbH auf dem berg 3, d-88690 uhldingen-muehlhofen fon: +49 7556 919891 , fax: +49 7556 919886 mail: gleixner@autronix.de, http://www.autronix.de