From owner-freebsd-questions Sun Apr 15 19:28:50 2001 Delivered-To: freebsd-questions@freebsd.org Received: from smtppop1pub.verizon.net (smtppop1pub.gte.net [206.46.170.20]) by hub.freebsd.org (Postfix) with ESMTP id B65C437B43F for ; Sun, 15 Apr 2001 19:28:47 -0700 (PDT) (envelope-from res03db2@gte.net) Received: from gte.net (evrtwa1-ar4-4-34-145-186.dsl.gtei.net [4.34.145.186]) by smtppop1pub.verizon.net with ESMTP ; id VAA84057473 Sun, 15 Apr 2001 21:21:36 -0500 (CDT) Received: (from res03db2@localhost) by gte.net (8.9.3/8.9.3) id TAA42466; Sun, 15 Apr 2001 19:30:32 -0700 (PDT) (envelope-from res03db2@gte.net) Date: Sun, 15 Apr 2001 19:30:31 -0700 From: Robert Clark To: Kal Torak Cc: Ben Smithurst , FreeBSD-questions Subject: Re: Creating EXACT image of a CD Message-ID: <20010415193031.A42447@darkstar.gte.net> References: <3AD68EBA.EC6A8380@quake.com.au> <20010413135052.H75296@scientia.demon.co.uk> <3AD80DD3.7CA90D11@quake.com.au> <20010415220524.A41165@scientia.demon.co.uk> <3ADA30B7.910C3921@quake.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.4i In-Reply-To: <3ADA30B7.910C3921@quake.com.au>; from kaltorak@quake.com.au on Mon, Apr 16, 2001 at 09:37:27AM +1000 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Some copy protection schemes introduce intentional errors on the master. Many CD-ROM drives fix the error before passing the data on. I would think that using dd to copy these sort of discs would not produce an identical copy. [RC] On Mon, Apr 16, 2001 at 09:37:27AM +1000, Kal Torak wrote: > Ben Smithurst wrote: > > > > Kal Torak wrote: > > > > > I never like to use the original cd, I always use a backup... > > > But it wont let me, do you have any idea how it knows its different > > > from the original and how I can fix that? > > > > no idea, sorry. > > > Yeah no problem... I think they must do something to a sector on the disk > so that its not readable, but there is no data there, and somehow it checks > for this to make sure its the real cd... > > using dd you get all the data, but it doesnt copy the special sector, infact > it seems to cause dd to ether generate and error or go into a read loop that > it wont get out of even with a kill -9... > > There must be some tool that can just make an image, even of whatever tricks > they do with sectors... Its so damn annoying not being able to make working > backups of cd's these days! > > In my country its a consumers right to be able to make a backup copy... They > seem to be making it very hard to use this right... > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message