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 98F511381FA for ; Wed, 14 May 2014 08:43:04 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 1FAF7E0B00; Wed, 14 May 2014 08:42:59 +0000 (UTC) Received: from mail.digimed.co.uk (82-69-83-178.dsl.in-addr.zen.co.uk [82.69.83.178]) by pigeon.gentoo.org (Postfix) with ESMTP id 060BEE0AF5 for ; Wed, 14 May 2014 08:42:57 +0000 (UTC) Received: from digimed.co.uk (shooty.digimed.co.uk [192.168.1.8]) by mail.digimed.co.uk (Postfix) with ESMTPA id 41B6D2382E for ; Wed, 14 May 2014 09:42:57 +0100 (BST) Date: Wed, 14 May 2014 09:42:47 +0100 From: Neil Bothwick To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] btrfs conversion: first impressions Message-ID: <20140514094247.7753ea59@digimed.co.uk> In-Reply-To: <537322E6.9040907@xunil.at> 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> <5372A61D.9060406@xunil.at> <20140514013910.37678e36@digimed.co.uk> <537322E6.9040907@xunil.at> Organization: Digital Media Production X-Mailer: Claws Mail 3.9.3-184-g39672a (GTK+ 2.24.23; x86_64-pc-linux-gnu) X-GPG-Fingerprint: 7260 0F33 97EC 2F1E 7667 FE37 BA6E 1A97 4375 1903 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 Content-Type: multipart/signed; micalg=pgp-sha1; boundary="Sig_/ba.Znqs0nC5wMSLsmFbLbBe"; protocol="application/pgp-signature" X-Archives-Salt: 8b40454e-1e52-4daa-b9b6-f275da297dc9 X-Archives-Hash: f23bf112c38e9bfea3bdcb16122654bd --Sig_/ba.Znqs0nC5wMSLsmFbLbBe Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Wed, 14 May 2014 10:01:42 +0200, Stefan G. Weichinger wrote: > >> Doesn't that screw up the whole idea of checksumming etc ? =20 > >=20 > > Not to my mind. The bits are recorded and checksummed, that's what=20 > > matters. If a bit on a platter is flipped, the decrypted bits will > > also change. =20 >=20 > But then the "container" of the btrfs would be corrupted, right? No, because each element of the RAID is encrypted separately, so btrfs can still use the good one to repair the bad one. If you were to create an mdadm array, put dm-crypt on that and then btrfs on top, which is more efficient because it encrypts each byte only once, then you would lose the check and repair facilities. --=20 Neil Bothwick -Come, come, why they couldn't hit an elephant from this dist- --Sig_/ba.Znqs0nC5wMSLsmFbLbBe Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iEYEARECAAYFAlNzLIsACgkQum4al0N1GQMrSwCfZqrwcU7j8H8DFxMZyXw2xGQo iwgAoJUd7TP/kVHtGWGED77W7YOD+uGF =6FRp -----END PGP SIGNATURE----- --Sig_/ba.Znqs0nC5wMSLsmFbLbBe--