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Article #29184Re: Tape backup systems
From: Scott Bayes
Date: Mon, 13 Jun 1988 16:16
Date: Mon, 13 Jun 1988 16:16
24 lines
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1136 bytes
>My dream backup machine and software request. > >capacity 1GByte in file format not image format. >media DAT or 8mm video tape. >speed 2 Mbytes per minute. At 2MB/minute, backing up the full GB will take over 8 hours. That's a pretty slow rate (2MB/min = approx 33 KB/sec). I should hope a modern backup technology would come nearer 100 to 200 KB/sec; don't forget you've probably got both the disc and the backup device on the same bus, sharing its total bandwidth, and 1 CPU (no DMA :-( ) to do the job. But still, 150 KB/sec seems reasonable, and would reduce your 1GB backup to approx 1-1/2 to 2 hours. > > > jim sadler > 206-656-5422 > hpubvwa!b-mrda!jim > P.O. Box 3707 MS 6R-24 > Seattle, Wa. USA 98124 Scott Bayes - an impatient type bayes@hpfclw
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!lll-tis!ames!pasteur!ucbvax!hplabs!hpda!hp-sde!hpfcdc!bayes From: bayes@hpfcdc.HP.COM (Scott Bayes) Newsgroups: comp.sys.mac Subject: Re: Tape backup systems Message-ID: <11010026@hpfcdc.HP.COM> Date: 13 Jun 88 16:16:05 GMT References: <145@ditsyda.oz> Organization: HP Ft. Collins, Co. Lines: 23