Date: Mon, 3 Aug 1998 15:10:27 -0700 (PDT) From: Scott <scott@SchematiX.net> To: Benedikt Stockebrand <benedikt@devnull.ruhr.de> Cc: Nathan Dorfman <nathan@fcc.net>, Andrew Bromage <bromage@queens.unimelb.edu.au>, freebsd-stable@FreeBSD.ORG Subject: Re: CD writers as a backup medium Message-ID: <Pine.BSF.4.01.9808031508140.443-100000@SchematiX.net> In-Reply-To: <87u33v939g.fsf@devnull.ruhr.de>
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On 2 Aug 1998, Benedikt Stockebrand wrote: > Scott <scott@SchematiX.net> 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
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