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 38D811381FA for ; Sat, 17 May 2014 16:52:39 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id EC575E0BE3; Sat, 17 May 2014 16:52:33 +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 CD361E0B4A for ; Sat, 17 May 2014 16:52:32 +0000 (UTC) Received: from digimed.co.uk (shooty.digimed.co.uk [192.168.1.8]) by mail.digimed.co.uk (Postfix) with ESMTPA id 7EF002309E for ; Sat, 17 May 2014 17:52:31 +0100 (BST) Date: Sat, 17 May 2014 17:52:16 +0100 From: Neil Bothwick To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Copying data efficiently Message-ID: <20140517175216.4949cc03@digimed.co.uk> In-Reply-To: <64D50D8F-61D6-4B66-AC9B-102DFE55C7AF@stellar.eclipse.co.uk> References: <20140517033357.GB3804@solfire> <201405170846.44414.michaelkintzios@gmail.com> <64D50D8F-61D6-4B66-AC9B-102DFE55C7AF@stellar.eclipse.co.uk> Organization: Digital Media Production X-Mailer: Claws Mail 3.9.3-197-g296282 (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_/ElyR.Ne5XTO+v8ftiI6ueve"; protocol="application/pgp-signature" X-Archives-Salt: 3c856547-d376-45d6-8dcb-c025f0acdba2 X-Archives-Hash: 167f641faeb0fcfc33fd56afbbb9edc6 --Sig_/ElyR.Ne5XTO+v8ftiI6ueve Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Sat, 17 May 2014 14:44:04 +0100, Stroller wrote: > > a) Unlike other commands, pv will give you a progress bar so that you > > know how long your back up is taking. =20 >=20 > I've been using ddrescue recently - by default it seems to be faster > than plain old regular dd. >=20 > I assume it must be possible to adjust the parameters (blocksize?) to > speed dd up, but I just want to run the command and not have to bother > tinkering. Use the bs option. The default is 512, which is incredibly slow, bs=3D4k makes a substantial difference. However, I usually use dcfldd these days, whch works out the best block size to use and adds progress reporting. --=20 Neil Bothwick Never underestimate the bandwidth of a station wagon full of tapes! --Sig_/ElyR.Ne5XTO+v8ftiI6ueve Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iEYEARECAAYFAlN3k8UACgkQum4al0N1GQMUfgCgkFnszCpElk9RpkeZI2/g+XO6 nT8AoL0xX1zI6v6TdLjNzMZ+fxnyp49Q =FSR8 -----END PGP SIGNATURE----- --Sig_/ElyR.Ne5XTO+v8ftiI6ueve--