From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762765AbYEBI0E (ORCPT ); Fri, 2 May 2008 04:26:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756972AbYEBIZq (ORCPT ); Fri, 2 May 2008 04:25:46 -0400 Received: from mx1.ukfsn.org ([77.75.108.10]:42788 "EHLO mail.ukfsn.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754568AbYEBIZo (ORCPT ); Fri, 2 May 2008 04:25:44 -0400 Message-ID: <481AD006.6050708@dgreaves.com> Date: Fri, 02 May 2008 09:25:42 +0100 From: David Greaves User-Agent: Mozilla-Thunderbird 2.0.0.12 (X11/20080406) MIME-Version: 1.0 To: Kasper Sandberg CC: David Rees , David Lethe , alex14641@yahoo.com, Justin Piszcz , linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: Sharing disks amoung multiple software RAIDs References: <1209692359.16523.2.camel@localhost> <73000.21239.qm@web50212.mail.re2.yahoo.com> <1209696179.16523.13.camel@localhost> <72dbd3150805020006p7f976a04o487389840f03b4a2@mail.gmail.com> <1209715763.7827.2.camel@localhost> In-Reply-To: <1209715763.7827.2.camel@localhost> X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Kasper Sandberg wrote: > Im not treating it as a backup, what i want, is to make sure that if 1 > disk dies, the data is still intact and ill hopefully be able to run > with 1 disk till the newly ordered one arrives Probably one of the main design objectives behind RAID/md > So my question remains.. Is md raid1 not suited for this need? would it > be safer to run in non-raid1 mode and daily(maybe hourly) rsync > everything over to the second disk? md is 100% guaranteed perfect or your money back... rsync is 100% guaranteed perfect or your money back... your backups are 100% guaranteed perfect or your money back... your hard drives are 100% guaranteed perfect or your money back... your CPU and RAM are 100% guaranteed perfect or your money back... your CPU and PSU fans are 100% guaranteed perfect or your money back... Clearly if you want to panic over reliability you have lots of choices :) David PS, FWIW md has saved my data* countless times over the past 'n' years in exactly the scenario you describe. *(or more accurately has saved me from having to restore my data)