From owner-freebsd-stable Mon Aug 3 15:11:58 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id PAA20276 for freebsd-stable-outgoing; Mon, 3 Aug 1998 15:11:58 -0700 (PDT) (envelope-from owner-freebsd-stable@FreeBSD.ORG) Received: from SchematiX.net (schematix.net [24.234.31.158]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id PAA20265 for ; Mon, 3 Aug 1998 15:11:55 -0700 (PDT) (envelope-from scott@SchematiX.net) Received: from localhost (scott@localhost) by SchematiX.net (8.8.8/8.8.8) with SMTP id PAA00477; Mon, 3 Aug 1998 15:10:27 -0700 (PDT) (envelope-from scott@SchematiX.net) Date: Mon, 3 Aug 1998 15:10:27 -0700 (PDT) From: Scott To: Benedikt Stockebrand cc: Nathan Dorfman , Andrew Bromage , freebsd-stable@FreeBSD.ORG Subject: Re: CD writers as a backup medium In-Reply-To: <87u33v939g.fsf@devnull.ruhr.de> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On 2 Aug 1998, Benedikt Stockebrand wrote: > 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. what someone uses for backing up would largely depend on how much they backup. > > 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. just depends on what you have to burn...if you only have 500MB to backup, CD-Rs would definately be the cheaper way to go. If you have 25GB to backup, something larger would definately be in order. > And then you'll have to change CD-R's every couple of minutes which is > a major pain in the behind. at 4x about every 20 minutes.....2x about 40 minutes.. > > > 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