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 1DiAbR-0004QW-Qo for linux-mtd@lists.infradead.org; Tue, 14 Jun 2005 08:33:17 -0400 Received: from list by ciao.gmane.org with local (Exim 4.43) id 1DiAVL-0005J8-HS for linux-mtd@lists.infradead.org; Tue, 14 Jun 2005 14:27:02 +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 ; Tue, 14 Jun 2005 14:26:55 +0200 Received: from sergei.sharonov by halhoupro3.halliburton.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 14 Jun 2005 14:26:55 +0200 To: linux-mtd@lists.infradead.org From: Sergei Sharonov Date: Tue, 14 Jun 2005 12:25:21 +0000 (UTC) Message-ID: References: <004d01c57074$ad3758d0$6702a8c0@niro> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: news Subject: Re: suggestion on use of linux-mtd List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi, > I have been running ext3 on diskonchip2000 (using m-sys trueffs driver) for > quite a while now and have not run into any problems yet, although I never > did any asynchronous power off tests. I am also interested in power fail tolerance of ext3 but could not find any test data. People mentioned that it should be better then other journaling filesystem (such as reserfs, jfs, xfs) because of different journaling scheme. > The diskonchip will be at least 384MB up to a maximum > of 1GB. You may forget about jffs2 on such large flashes. Depending on the size of the writes that filled the disk it will take anywhere from ten minutes to hours to mount jffs2. The only other alternative that uses mtd is yaffs. It does mount significantly faster, but the user base is small and there is no active development going on (as far as I can tell). > in the same partition. Asynchronous power offs cannot be ruled out due to > the nature of the instrument that will host the cpu board with the > diskonchip. I know people that did extensive power-cycling testing on jffs2 with very good results. I tried cycling yaffs and it fails on me about after 100-200 cycles. > What exactly does one get with *just* NFTL, i.e. does it makes sense to run > ext3 on top of NFTL? Is NFTL production ready? Are you going to power cycle your nftl+ext3 setup? I would be interested in results. Best regards, Sergei Sharonov