From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1RkPVL-0002Kb-Dp for garchives@archives.gentoo.org; Tue, 10 Jan 2012 00:23:55 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 4808021C0A2; Tue, 10 Jan 2012 00:23:41 +0000 (UTC) Received: from mx.virtyou.com (mx.virtyou.com [178.33.32.244]) by pigeon.gentoo.org (Postfix) with ESMTP id 8D96621C029 for ; Tue, 10 Jan 2012 00:22:45 +0000 (UTC) Received: from [192.168.2.43] (p5B275DC2.dip.t-dialin.net [91.39.93.194]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx.virtyou.com (Postfix) with ESMTPSA id 80CD9DC04C for ; Tue, 10 Jan 2012 01:22:44 +0100 (CET) Message-ID: <4F0B8448.4040605@wonkology.org> Date: Tue, 10 Jan 2012 01:20:24 +0100 From: Alex Schuster User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:8.0) Gecko/20111105 Thunderbird/8.0 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: [gentoo-user] Horrible TrueCrypt performance Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit X-Archives-Salt: 3d800f59-c9af-4082-873b-cd745fee85ed X-Archives-Hash: 18ba79a9e9adc5adfc39ed9ef3873c2c Hi there! I have to copy some 100 G of files from one to another USB drive. Both are formatted with NTFS, the destination drive already has a truecrypt container file where I need to store the data into. This is sort of working, but the speed is waayyyy too slow. After about four hours, only 8 G were copied. Looking at the cp -r output shows I see a bunch of files being processed, then the output stops for some minutes. Sometimes for half an hour. Top shows the mount.ntfs-3g process writing to the destination using all resources of one of my two cores. iotop -d 10 shows this process mainly. What I find strange is that this process is also reading from the drive I am copying to, 1600 K/s compared to 260 K/s writing speed. Huh?? And sometimes there is no I/O from this process during the ten seconds of sampling time. I sampled for about half an hour, and iotop -oa shows that only 20 MB were written. This will never finish. I used this command to mount the truecrypt container: truecrypt --fs-options=uid=1000,umask=0007 -k /home/wonko/my.key /media/My USB Drive/my_container /mnt Adding 'async' to the fs-options did not help. Any ideas? I've never used TrueCrypt before. Wonko