From owner-freebsd-questions@FreeBSD.ORG Tue Nov 2 14:34:20 2004 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 CB40A16A4CE for ; Tue, 2 Nov 2004 14:34:20 +0000 (GMT) Received: from gaia.nimnet.asn.au (nimbin.lnk.telstra.net [139.130.45.143]) by mx1.FreeBSD.org (Postfix) with ESMTP id 19EF543D5F for ; Tue, 2 Nov 2004 14:34:19 +0000 (GMT) (envelope-from smithi@nimnet.asn.au) Received: from localhost (smithi@localhost) by gaia.nimnet.asn.au (8.8.8/8.8.8R1.4) with SMTP id BAA22113; Wed, 3 Nov 2004 01:32:54 +1100 (EST) (envelope-from smithi@nimnet.asn.au) Date: Wed, 3 Nov 2004 01:32:54 +1100 (EST) From: Ian Smith To: Jonathon McKitrick In-Reply-To: <20041102134750.GA58940@dogma.freebsd-uk.eu.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: "Michael C. Shultz" cc: freebsd-questions@freebsd.org Subject: Re: Question about ISO filesystems and CD-R's 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: Tue, 02 Nov 2004 14:34:20 -0000 On Tue, 2 Nov 2004, Jonathon McKitrick wrote: > On Wed, Nov 03, 2004 at 12:39:00AM +1100, Ian Smith wrote: > : but you can keep on adding further ISO images to a CD-R (or CD-RW) until > : it's full, using mkisofs + burncd at least. Very handy here for certain > : types of backups, especially on a remote box visited weekly. > > Ah, that's exactly what I'm looking for. I bought a bunch of those > mini-CD-R's, thinking I didn't want to waste a regular CD-R to backup 100 > megs of my laptop files. But if I can keep dumping iso's from mkisofs onto > the same CD-R, effectively erasing it and adding a new one and just taking > up more space cumulatively, then I can keep the CD-R in the drive, run > backups every week, and only replace it when it is full, right? Right, except it doesn't 'effectively erase' existing files on the CD-R; all of the files added to each session appear when you mount it. Hmm, I think I've only ever appended unique files so far; I suppose that the latest version of any duplicate pathname would be what you'd get back, but you might want to confirm that assumption. > : My cdappend script's full of paranoid parameter and error checking and > : such, but is based on this simple and likely more illustrative one: > > Thanks for the script. I'll put it to good use. No worries. I'll mail you my larger, more paranoid version offlist. Cheers, Ian