*BSD News Article 7052


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Newsgroups: comp.unix.bsd
Path: sserve!manuel.anu.edu.au!munnari.oz.au!uunet!usc!sol.ctr.columbia.edu!ira.uka.de!ira.uka.de!smurf.sub.org!flatlin!bad
From: bad@flatlin.ka.sub.org (Christoph Badura)
Subject: Re: ISA is faster than EISA ? (Was: Re: DOS and 386BSD (and NT and OS2))
Organization: Guru Systems/Funware Department
Date: Sun, 25 Oct 1992 23:13:17 GMT
Message-ID: <Bwp9u6.918@flatlin.ka.sub.org>
References: <1992Oct16.175743.19250@fcom.cc.utah.edu> <1992Oct21.160231.6516@ntuix.ntu.ac.sg> <1992Oct22.093459.13824@autelca.ascom.ch> <BwIwu4.Mx6@pix.com> <1992Oct23.140133.29341@microware.com>
Lines: 26

In <1992Oct23.140133.29341@microware.com> adam@microware.com (Adam Goldberg) writes:

>For an average of 1.76MB/second. [On OS-9000]

I don't see how you arrive at an *average* of 1.76MB/s when you get
half the time 1.76MB/s and half the time (actually more than half in
your numbers) ~1.5MB/s.

>Once upon a time, I hooked the same drive up to a Compaq 486/33M (EISA)
>with an Adaptec 1740 and got transfer rates in the neighborhood of
>7 MB/second.

With what drive. Certainly not with >256KB files of that Quantum drive.

>You don't need to buy a house for high transfer--you need an OS which
>allows synchronous SCSI transfers.

And in the case of Adaptec or BusLogic (formerly BusTek) controllers
you don't need OS support for synchronous SCSI transfers as the host
adapters negotiate that with the drive without os intervention.

-- 
				Christoph Badura  ---  bad@flatlin.ka.sub.org

AIX is a better... is a better...  is a better... OpenSystem.
					IBM Rep at GUUG Symposium '92