Path: utzoo!attcan!uunet!bu.edu!rpi!uwm.edu!psuvax1!psuvm!cunyvm!ndsuvm1.bitnet!ud182050
From: UD182050@NDSUVM1.BITNET (Mike Aos)
Newsgroups: comp.sys.apple2
Subject: DMA SCSI card benchmarks
Message-ID: <4312UD182050@NDSUVM1>
Date: 18 Jul 90 09:16:40 GMT
Organization: North Dakota Higher Education Computer Network, Fargo, ND
Lines: 27
DISCLAIMER: Author bears full responsibility for contents of this article.

I've been fighting with this stupid thing for about a week now, and I
finally figured out that my SCSI terminator was a little off, and the DMA
card wouldn't stand for it.  Anyway, all is working (for the moment), and I
did some benchmarks in case anyone was interested.

Mike

Drive     Linear Read Random Read OS Overhead  DMA switch on
Chinook CT40 9.40      33.47        .86            no
             2.69      35.98        .86            yes
Rodime 45M   4.57      25.45        .88            no
             1.26      27.04        .86            yes
/RAM5        4.35       7.16        .70            yes

All timings taken with ProSel-16, both drives formatted 1:1, all times
in milliseconds.

BTW-This is on a IIgs w/2M GS-RAM+ and newest TWGS.


-------
Mike

UD182050@NDSUVM1 (.Bitnet?)        "Share and Enjoy"
UD182050@VM1.NoDak.Edu                    -Sirius Cybernetics Corporation
                    Apple IIgs 'till I can afford a NeXT!
I got LOTSA opinions.  You want one?  You can have it!