From owner-freebsd-questions@FreeBSD.ORG Tue Aug 23 01:08:15 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2689E16A41F for ; Tue, 23 Aug 2005 01:08:15 +0000 (GMT) (envelope-from flowers@users.sourceforge.net) Received: from pd4mo2so.prod.shaw.ca (shawidc-mo1.cg.shawcable.net [24.71.223.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id BCE4D43D49 for ; Tue, 23 Aug 2005 01:08:14 +0000 (GMT) (envelope-from flowers@users.sourceforge.net) Received: from pd5mr3so.prod.shaw.ca (pd5mr3so-qfe3.prod.shaw.ca [10.0.141.144]) by l-daemon (Sun ONE Messaging Server 6.0 HotFix 1.01 (built Mar 15 2004)) with ESMTP id <0ILN00AFSH6T3810@l-daemon> for freebsd-questions@freebsd.org; Mon, 22 Aug 2005 18:54:29 -0600 (MDT) Received: from pn2ml3so.prod.shaw.ca ([10.0.121.147]) by pd5mr3so.prod.shaw.ca (Sun ONE Messaging Server 6.0 HotFix 1.01 (built Mar 15 2004)) with ESMTP id <0ILN00KPXH6TPIE0@pd5mr3so.prod.shaw.ca> for freebsd-questions@freebsd.org; Mon, 22 Aug 2005 18:54:29 -0600 (MDT) Received: from [192.168.1.96] (S01060010a72631f9.cg.shawcable.net [68.144.46.209]) by l-daemon (iPlanet Messaging Server 5.2 HotFix 1.18 (built Jul 28 2003)) with ESMTP id <0ILN00J4BH6TTO@l-daemon> for freebsd-questions@freebsd.org; Mon, 22 Aug 2005 18:54:29 -0600 (MDT) Date: Mon, 22 Aug 2005 18:57:58 -0600 From: Danny MacMillan In-reply-to: <007301c5a755$ea1ee840$6701a8c0@monster> To: Sebastian Pahlke Message-id: <430A7496.6080206@users.sourceforge.net> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 Content-transfer-encoding: 7bit X-Accept-Language: en-us, en References: <007301c5a755$ea1ee840$6701a8c0@monster> User-Agent: Mozilla Thunderbird 1.0.6 (Windows/20050716) Cc: freebsd-questions@freebsd.org Subject: Re: dd is so slow on my SCSI disc X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Aug 2005 01:08:15 -0000 Sebastian Pahlke wrote: > Hi all, > > I'm trying to "clean" a disc before selling them: > > dd if=/dev/zero of=/dev/da0 You may want to consider using /dev/random instead of, or in combination with, /dev/zero. Zeroing out a disk isn't a significant barrier to forensic analysis.