From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id iADM0kr13184 for ; Sat, 13 Nov 2004 17:00:46 -0500 Received: from wproxy.gmail.com (wproxy.gmail.com [64.233.184.197]) by mx3.redhat.com (8.12.11/8.12.11) with ESMTP id iADM0ePP017987 for ; Sat, 13 Nov 2004 17:00:40 -0500 Received: by wproxy.gmail.com with SMTP id 58so447378wri for ; Sat, 13 Nov 2004 14:00:35 -0800 (PST) Message-ID: <87f94c37041113140053f493b0@mail.gmail.com> Date: Sat, 13 Nov 2004 17:00:35 -0500 From: Greg Freemyer Subject: Re: [linux-lvm] Re: raid 1 on a single disk In-Reply-To: <20041113211324.GA13108@dragonhold.org> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit References: <89af10f90411130217467c439@mail.gmail.com> <89af10f90411130241e20e2c2@mail.gmail.com> <20041113211324.GA13108@dragonhold.org> Reply-To: Greg Freemyer , LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii" To: LVM general discussion and development > > P.S. I'd be really tempted to talk to the person asking you to do this, and ask them what they hope to achieve... > I can almost envision times it would be useful. i.e. disk speed is unimportand, disk data rarely changes, but when it does it is very important, and traditional backups are not feasible for some unknown reason? By having the data written to 2 different places on the disk, the likelyhood of a failure making it truly unrecoverable is extremely small. ie. If you have disk media problems, likely only one location of the other will be affected. If you have a drive electronics failure, you can ship the drive off to have recovery performed. (Over $1000 I know, but if the data is important.) Greg