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From: davidsen@steinmetz.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: Comments on FASTBACK disk backup utility?
Message-ID: <1214@steinmetz.steinmetz.UUCP>
Date: Wed, 18-Feb-87 10:01:54 EST
Article-I.D.: steinmet.1214
Posted: Wed Feb 18 10:01:54 1987
Date-Received: Fri, 20-Feb-87 21:52:12 EST
References: <4394@curly.ucla-cs.UCLA.EDU>
Reply-To: davidsen@kbsvax.UUCP (William E. Davidsen Jr)
Organization: General Electric CRD, Schenectady, NY
Lines: 20

In article <4394@curly.ucla-cs.UCLA.EDU> wales@LOCUS.UCLA.EDU (Rich Wales) writes:
>I am considering buying the FASTBACK hard-disk backup program.
>
It *is* really fast. It uses one DMA channel to write directly
to the floppy controller which DOS is reading the hard disk. It
uses its own format on the floppies, and it *looks* like an XOR
of every sector is written as the last sector on the track. If
you have two floppy drives it will toggle between them,
eliminating the "operator time" to change disks. After the first
backup (when it formats as well as writes) the backups are even
faster. Using 1200k disks I see about 1.5MB/sec backup rate on
previously used disks, 600KB/sec on fresh disks.

Disclamer: a customer only, your milage may vary.

-- 
bill davidsen			sixhub \
      ihnp4!seismo!rochester!steinmetz ->  crdos1!davidsen
				chinet /
ARPA: davidsen%crdos1.uucp@ge-crd.ARPA (or davidsen@ge-crd.ARPA)