From: Jesse Brandeburg Subject: Re: raid is dangerous but that's secret (was Re: [patch] ext2/3: document conditions when reliable operation is possible) Date: Mon, 31 Aug 2009 10:49:28 -0700 Message-ID: <4807377b0908311049id9a2167r937bc8447c2b3546__45697.3500353799$1251741511$gmane$org@mail.gmail.com> References: <20090824212518.GF29763@elf.ucw.cz> <4A947682.2010204@redhat.com> <200908262253.17886.rob@landley.net> <4A967175.5070700@redhat.com> <20090827221319.GA1601@ucw.cz> <4A9733C1.2070904@redhat.com> <20090828064449.GA27528@elf.ucw.cz> <20090828120854.GA8153@mit.edu> <20090830075135.GA1874@ucw.cz> <20090830152023.GB23828@mit.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE To: Theodore Tso , Pavel Machek , NeilBrown , Ric Wheeler , Rob Landley , Florian Weimer , Return-path: Received: from mail-yw0-f188.google.com ([209.85.211.188]:52281 "EHLO mail-yw0-f188.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753854AbZHaR4x convert rfc822-to-8bit (ORCPT ); Mon, 31 Aug 2009 13:56:53 -0400 In-Reply-To: <20090830152023.GB23828@mit.edu> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Sun, Aug 30, 2009 at 8:20 AM, Theodore Tso wrote: > So we *do* have the warning light; the problem is that just as some > people may not realize that "check brakes" means, "YOU COULD DIE", > some people may not realize that "hard drive failure; RAID array > degraded" could mean, "YOU COULD LOSE DATA". > > Fortunately, for software RAID, this is easily solved; if you are so > concerned, why don't you submit a patch to mdadm adjusting the e-mail > sent to the system administrator when the array is in a degraded > state, such that it states, "YOU COULD LOSE DATA". =A0I would gently > suggest to you this would be ***far*** more effective that a patch to > kernel documentation. In the case of a degraded array, could the kernel be more proactive (or maybe even mdadm) and have the filesystem remount itself withOUT journalling enabled? =A0This seems on the surface to be possible, but I don't know the internal particulars that might prevent/allow it. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html