Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422764AbWKFCmY (ORCPT ); Sun, 5 Nov 2006 21:42:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422891AbWKFCmY (ORCPT ); Sun, 5 Nov 2006 21:42:24 -0500 Received: from pop-sarus.atl.sa.earthlink.net ([207.69.195.72]:44478 "EHLO pop-sarus.atl.sa.earthlink.net") by vger.kernel.org with ESMTP id S1422764AbWKFCmX (ORCPT ); Sun, 5 Nov 2006 21:42:23 -0500 Message-ID: <454EA107.7020108@cfl.rr.com> Date: Sun, 05 Nov 2006 21:42:15 -0500 From: Phillip Susi User-Agent: Thunderbird 1.5.0.7 (X11/20060918) MIME-Version: 1.0 To: Mikulas Patocka CC: Grzegorz Kulewski , linux-kernel@vger.kernel.org Subject: Re: New filesystem for Linux References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1020 Lines: 24 Mikulas Patocka wrote: > There was discussion about it here some times ago, and I think the > result was that the IDE bus is reset prior to capacitors discharge and > total loss of power and disk has enough time to finish a sector --- but > if you have crap power supply (doesn't signal power loss), crap > motherboard (doesn't reset bus) or crap disk (doesn't respond to reset), > it can fail. > > BTW. reiserfs and xfs depend on this feature too. ext3 is the only one > that doesn't. > > Mikulas Yes, if your disk can not atomically commit a single sector, then it is broken. And ALL filesystems rely on this behavior because they all expect NOT to have hardware IO read failures of important metadata after a power failure ( due to the sector ECC failing ). - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/