From owner-freebsd-questions@FreeBSD.ORG Wed May 28 08:04:34 2003 Return-Path: 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 757DE37B401 for ; Wed, 28 May 2003 08:04:34 -0700 (PDT) Received: from zogbe.tasam.com (63-165-178-196.uterr.blacksburg.ntc-com.net [63.165.178.196]) by mx1.FreeBSD.org (Postfix) with ESMTP id AB6A443FBF for ; Wed, 28 May 2003 08:04:33 -0700 (PDT) (envelope-from clash@tasam.com) Received: from frigate (root@zogbe.tasam.com [10.95.95.5] (may be forged)) by zogbe.tasam.com (8.12.9/8.12.9) with SMTP id h4SF4XlW083677; Wed, 28 May 2003 11:04:33 -0400 (EDT) Message-ID: <005201c3252a$72b05a00$08695f0a@frigate> From: "Joseph Gleason" To: "adrian kok" , References: <20030528141035.32200.qmail@web21204.mail.yahoo.com> Date: Wed, 28 May 2003 11:04:33 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Subject: Re: advice about copy from disk to disk X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 May 2003 15:04:34 -0000 I usually get better transfer rates with bs=16k or so. What transfer rate do you get? If they are modern drives (which 80gb implies) you should get about 20-30MB/s. At that rate it should take a little over an hour to transfer. To see the transfer start the dd, let it run for maybe 10-15 sec and give it a Ctrl+c. It should print out its transfer rate thus far. Probably far more important than block size, is putting those drives on separate ide channels. Your notation indicates that they are on the same cable, which will slow it down significantly. If all of your ide positions are in use, it might be worth while to get an add on ide card if you are doing this alot. Also, what ide mode are the drives in? You can see this with "atacontrol mode N", where N is the number of the ide channel you are intersted in. If it says PIO4 or something starting with PIO it will probably be quite slow. ----- Original Message ----- From: "adrian kok" To: Sent: 28 May, 2003 10:10 Subject: advice about copy from disk to disk > Hi all > > Can you give me advice: quicky copy from disk to disk > > I use command dd and it almost takes the whole day to > copy 80G data! > dd if=seondary master of=secondary slave bs=1024 > (Secondary master to secondary slave)? > > and is there any tools also > > Thank you very much > > _______________________________________________________________________ > Do You Yahoo!? > Get your free @yahoo.com.hk address at http://mail.english.yahoo.com.hk > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" >