From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932083AbWGCVzh (ORCPT ); Mon, 3 Jul 2006 17:55:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932090AbWGCVzh (ORCPT ); Mon, 3 Jul 2006 17:55:37 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:25778 "EHLO lxorguk.ukuu.org.uk") by vger.kernel.org with ESMTP id S932083AbWGCVzg (ORCPT ); Mon, 3 Jul 2006 17:55:36 -0400 Subject: Re: ext4 features From: Alan Cox To: Arjan van de Ven Cc: Tomasz Torcz , Helge Hafting , Thomas Glanzmann , "Theodore Ts'o" , LKML In-Reply-To: <1151960503.3108.55.camel@laptopd505.fenrus.org> References: <20060701163301.GB24570@cip.informatik.uni-erlangen.de> <20060701170729.GB8763@irc.pl> <20060701174716.GC24570@cip.informatik.uni-erlangen.de> <20060701181702.GC8763@irc.pl> <20060703202219.GA9707@aitel.hist.no> <20060703205523.GA17122@irc.pl> <1151960503.3108.55.camel@laptopd505.fenrus.org> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Mon, 03 Jul 2006 23:12:00 +0100 Message-Id: <1151964720.16528.22.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.6.2 (2.6.2-1.fc5.5) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Ar Llu, 2006-07-03 am 23:01 +0200, ysgrifennodd Arjan van de Ven: > raid is great for protecting against individual disks or sectors going > bad. But raid, especially high performance implementations, do not > checksum data or detect corruptions. > > They're different purpose with almost zero overlap in purpose or even > goal... Same layer though - checksums are really a device mapper type problem rather than an fs type problem. Alan