Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!b-tech!zeeff
From: zeeff@b-tech.ann-arbor.mi.us (Jon Zeeff)
Newsgroups: comp.unix.i386
Subject: Re: ESDI controller recommendations
Message-ID: <9646@b-tech.ann-arbor.mi.us>
Date: 4 Sep 89 13:23:05 GMT
References: <121@mdi386.UUCP> <1474@wb3ffv.ampr.org> <4843@looking.on.ca> <1989Sep2.023511.24943@ddsw1.MCS.COM> <68@calcite.UUCP> <1989Sep4.024559.13279@ddsw1.MCS.COM>
Reply-To: zeeff@b-tech.ann-arbor.mi.us (Jon Zeeff)
Organization: Branch Technology Ann Arbor, MI
Lines: 22

>There are a lot of people who won't consider DEC RISC machines, or Sun
>Sparcstations for the simple reason that they are single-sourced.  If you 
>look at those systems you'll also find rather disappointing I/O performance 
>compared to a DPT + ESDI disk + 33Mhz 386 machine.  

I find the DEC RISC machines disk i/o terrible but the new Sun 
machines are about the same as a '386 ESDI system with Interactive 
Unix.  Sun also uses any available memory for disk caching (which works
well).  A '386 scsi system is faster.

Some rough results for raw throughput:

DEC 3100 	150
'386 ESDI	522
Sun Spark/1     550 
'386 SCSI	677



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Branch Technology            |  zeeff@b-tech.ann-arbor.mi.us
                             |  Ann Arbor, MI