From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:57951 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752719AbaLAJ0g (ORCPT ); Mon, 1 Dec 2014 04:26:36 -0500 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1XvNFb-0000Ay-8F for linux-btrfs@vger.kernel.org; Mon, 01 Dec 2014 10:26:35 +0100 Received: from 94.250.180.197 ([94.250.180.197]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 01 Dec 2014 10:26:35 +0100 Received: from gour by 94.250.180.197 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 01 Dec 2014 10:26:35 +0100 To: linux-btrfs@vger.kernel.org From: Gour Subject: Re: pro/cons of raid1 with mdadm/lvm2 Date: Mon, 1 Dec 2014 10:26:24 +0100 Message-ID: <20141201102624.1224bc54@atmarama> References: <20141130121147.45884217@atmarama> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Mon, 01 Dec 2014 09:06:19 +1100 Russell Coker wrote: > When the 2 disks have different data mdadm has no way of knowing > which one is correct and has a 50% chance of overwriting good data. > But BTRFS does checksums on all reads and solves the problem of > corrupt data - as long as you don't have 2 corrupt sectors in > matching blocks. Hmm, this is very interesting and valuable info. Thank you. Sincerely, Gour -- Many, many births both you and I have passed. I can remember all of them, but you cannot, O subduer of the enemy! -- One is understood to be in full knowledge whose every endeavor is devoid of desire for sense gratification. He is said by sages to be a worker for whom the reactions of work have been burned up by the fire of perfect knowledge. http://www.atmarama.net | Hlapicina (Croatia) | GPG: 52B5C810