From owner-freebsd-questions Mon Feb 7 11:41:42 2000 Delivered-To: freebsd-questions@freebsd.org Received: from proxy4.ba.best.com (proxy4.ba.best.com [206.184.139.15]) by builder.freebsd.org (Postfix) with ESMTP id BFF6E40ED for ; Mon, 7 Feb 2000 11:41:38 -0800 (PST) Received: from stcinc.com (gw-covad768k-cognitivetech.ncal.verio.com [207.20.238.29] (may be forged)) by proxy4.ba.best.com (8.9.3/8.9.2/best.out) with ESMTP id LAA18351 for ; Mon, 7 Feb 2000 11:40:39 -0800 (PST) Message-ID: <389F23BD.22E74981@stcinc.com> Date: Mon, 07 Feb 2000 11:57:49 -0800 From: Gregory Carvalho Reply-To: GregoryC@stcinc.com Organization: Simplified Technology Company X-Mailer: Mozilla 4.51 [en] (X11; I; FreeBSD 3.2-RELEASE i386) X-Accept-Language: en MIME-Version: 1.0 To: FreeBSD Questions Subject: Re: about dd References: <20000207183828.21660.qmail@hotmail.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG You need to clear sector 1 (which houses the partition table and MBR). That is the most critical. If you do not specify a count, it will zero the whole drive which may take some time:) Jerry Lei wrote: > > Hi, I read the low level format of Hard Disk in the FreeBSD installation > guide. > The author use > dd if=/dev/zero of=/dev/da1 count=100 > > I have a question, why count=100? I use man dd, the manual says that count=n > means Copy only n input blocks. If I use HD whose size more than the example > one in the book. Do I still use count=100? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message