From owner-freebsd-stable Mon Aug 3 15:03:38 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id PAA19413 for freebsd-stable-outgoing; Mon, 3 Aug 1998 15:03:38 -0700 (PDT) (envelope-from owner-freebsd-stable@FreeBSD.ORG) Received: from mail.ruhrgebiet.individual.net (in-ruhr.ruhr.de [141.39.224.38]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id PAA19404 for ; Mon, 3 Aug 1998 15:03:33 -0700 (PDT) (envelope-from bs@devnull.ruhr.de) Received: (from admin@localhost) by mail.ruhrgebiet.individual.net (8.8.5-r-beta/8.8.5) with UUCP id XAA10131; Mon, 3 Aug 1998 23:37:15 +0200 (MET DST) Received: from [192.168.22.75] (helo=rm.devnull.ruhr.de) by devnull.ruhr.de with esmtp (Exim 1.92 #1) id 0z2tqH-0002bl-00; Sun, 2 Aug 1998 10:50:13 +0200 Received: from bs by rm.devnull.ruhr.de with local (Exim 1.92 #1) id 0z2tq7-0000g3-00; Sun, 2 Aug 1998 10:50:03 +0200 To: Scott Cc: Nathan Dorfman , Andrew Bromage , freebsd-stable@FreeBSD.ORG Subject: Re: CD writers as a backup medium References: Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit From: Benedikt Stockebrand Date: 02 Aug 1998 10:50:02 +0200 In-Reply-To: Scott's message of "Sat, 1 Aug 1998 12:56:41 -0700 (PDT)" Message-ID: <87u33v939g.fsf@devnull.ruhr.de> Lines: 46 X-Mailer: Gnus v5.5/XEmacs 20.4 - "Emerald" Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Scott writes: > The 7502 can be found for $269 or less for the bare drive. Its a 4x8 drive > with 1MB or 2MB cache (can't remember). DAT drives are nice, but the > drives are quite expensive. Just for comparison, a Seagate DDS-2 streamer costs about DM 900 ~= US$ 500 here in Germany. A DDS-2 (90 m) tape is DM 6.50 ~= US$ 3.70. At my former company we've used these tapes approx. five times before they were retired. We needed two 90m tapes per night for approx. 7 GB of data. That's DM 2.60 ~= US$ 1.45 per night on media. Doing five backups per week we got DM 13.20 ~= US$ 7.25 per week, DM 686.40 ~= US$ 380 per year on media. Assuming 11 CD-Rs per night for the same amount of data and cheap CD-Rs at US$ 1 each you'd pay US$ 11 per night for that backup, US$ 55 per week, US$ 2860 per year for the media. That's assuming that you don't have any write faults. If you did the backup on CD-Rs you'd have to write the nightly backup to a holding disk and write them out during the following day. You'll know the US prices of some 8GB of SCSI disk space better than I do. Looks like the CD-R approach will be a bit more expensive in the long run. And then you'll have to change CD-R's every couple of minutes which is a major pain in the behind. > Plus, you can't beat the versatility of a CD-ROM. If you're talking about archival you're probably right. For backup, especially above the 650 MB limit, you wouldn't really want to try. So long, Ben -- Ben(edikt)? Stockebrand Un*x SA My name and email address are not to be added to any list used for advertising purposes. Any sender of unsolicited advertisement e-mail to this address im- plicitly agrees to pay a DM 500 fee to the recipient for proofreading services. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message