From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (unknown [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id E5CE21381FA for ; Tue, 13 May 2014 23:09:27 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 4BD84E0A53; Tue, 13 May 2014 23:09:23 +0000 (UTC) Received: from postler.lichtfels.com (postler.lichtfels.com [78.46.92.195]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 2A3BFE0A43 for ; Tue, 13 May 2014 23:09:22 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by postler.lichtfels.com (Postfix) with ESMTP id 62DC52DC5E for ; Wed, 14 May 2014 01:09:20 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=xunil.at; s=mailout; t=1400022560; bh=ibEkOwDAGA6czkecjQ6g9NlyBu+54IpNfcnVEq1+TzM=; h=Date:From:Reply-To:To:Subject:References:In-Reply-To; b=ftthNMK/nQPAmQjdOLnGrPllw0NWAMpZfeOfdTbsXp7qV5UTByVa90b5TjanERQHp E5MDKrUAKjK1L0Or1a1dgaLisv9W7LajJHtcwnNbSTL4Fok666h03Aj+VIzMVltEfw lpxmihpBv86FvnKKYkYm/ifdPOh1VfyeZyx7+HTY= Received: from postler.lichtfels.com ([127.0.0.1]) by localhost (postler.lichtfels.com [127.0.0.1]) (amavisd-maia, port 10024) with LMTP id 06097-06 for ; Wed, 14 May 2014 01:09:18 +0200 (CEST) Received: from [IPv6:2001:15c0:65ff:8742:5ad:459d:8b23:7ad6] (unknown [IPv6:2001:15c0:65ff:8742:5ad:459d:8b23:7ad6]) (using TLSv1 with cipher ECDHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by postler.lichtfels.com (Postfix) with ESMTPSA id 6A6FD2DC4D for ; Wed, 14 May 2014 01:09:18 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=xunil.at; s=mailout; t=1400022558; bh=ibEkOwDAGA6czkecjQ6g9NlyBu+54IpNfcnVEq1+TzM=; h=Date:From:Reply-To:To:Subject:References:In-Reply-To; b=nenWqcpxeXvdFSIA8HXYmsyrLHTdwdHJLqNYvsOEkkXOM+SkXPIaBPxkI1xXNP2Um bBk0Q7taFzxgSt1ONfvgH2n5ZJcSVDOmk7qltvIiJsx6AMJBuBy09Afh5qGDw+qKSg 0mM9ka2b+LoBUSA973Hsvlcum2lJ+qQXpVbvvAm4= Message-ID: <5372A61D.9060406@xunil.at> Date: Wed, 14 May 2014 01:09:17 +0200 From: "Stefan G. Weichinger" Organization: oops! User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] btrfs conversion: first impressions References: <20140506121832.678ae781@marcec> <5369688C.1040708@iinet.net.au> <20140507015126.5b57fb88@marcec> <536B712E.3040009@iinet.net.au> <536BC974.9090200@xunil.at> <536D339D.9000506@xunil.at> <536E0A01.4070803@xunil.at> <536F6EA2.6030506@xunil.at> <536FA2A4.4040205@xunil.at> <536FEA92.1080502@xunil.at> <20140512163049.4f605ff0@marcec> <537112CB.7050408@xunil.at> <53729DE4.3090908@xunil.at> <20140514000228.546a90f2@hactar.digimed.co.uk> In-Reply-To: <20140514000228.546a90f2@hactar.digimed.co.uk> X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.2c X-Archives-Salt: 98f2d5b8-11d4-4ab6-a342-e1045c0c92ed X-Archives-Hash: b429e307f6be57e743ccb1aaf69dbba6 Am 14.05.2014 01:02, schrieb Neil Bothwick: > On Wed, 14 May 2014 00:34:12 +0200, Stefan G. Weichinger wrote: > >> How to transform partitions/directories set up with cryptsetup >> into this new world? Set up a btrfs on top of the crypted fs ? I >> ask because I look for a clean setup for my 2 thinkpads. > > Encrypt the partition(s) with cryptsetup and them use the devices > in /dev/mapper to create the volumes. That's how I have my ZFS > pools set up and I'm looking to do the same when I try BTRFS. Doesn't that screw up the whole idea of checksumming etc ? In my understanding the FS (=btrfs or zfs) should have the direct contact to the "metal" (=hdd/sdd) to be fully able to detect bitrot and stuff. btrfs inside a crypted volume will work, yes, but it won't be able to see or correct flipping bits on the hardware, because the underlying layers of cryptsetup etc might hide them. Right?