Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!psuvax1!psuvm!cunyvm!ndsuvm1.bitnet!ud182050
From: UD182050@NDSUVM1.BITNET (Mike Aos)
Newsgroups: comp.sys.apple2
Subject: Re: Apple II High Speed SCSI Utilities question
Message-ID: <4475UD182050@NDSUVM1>
Date: 11 Aug 90 22:11:02 GMT
References: <627@servio.UUCP>
Organization: North Dakota Higher Education Computer Network, Fargo, ND
Lines: 45
DISCLAIMER: Author bears full responsibility for contents of this article.

I've posted before, but since no one bothered to read it...

The utilities that come with the DMA SCSI card will format it, but it's not
1:1.  It's 2:1 or worse.  USE THE FINDER!  It will ask you what you want to
format it at, then use ADU to partition.  Since my drive was already formatted,
I ended up nuking the first few blocks with BLOCK.WARDEN so the Finder couldn't
recognise it, then asked me if I wanted for format it.  Once everything was up
and running, I ran it through ProSel-16's "Statistics on Disk Access" and got

-------
Conner 40M 1:1 interleave
Non-DMA            DMA
09.40   Linear    02.69
33.47   Random    35.98
00.86 OS Overhead   .86

Rodime RS3000 45M 1:1
Non-DMA            DMA
04.58   Linear    01.26
25.45   Random    27.04
  .88 OS Overhead   .86

/RAM5
04.35   Linear
07.16   Random
00.70 OS Overhead

The numbers vary a little depending on how many HD's I have connected, and
how they are terminated, and when I do it (so it seems), but only a couple
ms (actually, the Conner went from roughly 10ms linear to around 3ms linear
after I finally got everything working again today).  I'm having a LOT of
problems with termination.

Mike

P.S.  Does anyone have a clue how the Rodime drive can be 3.5 times faster than
/RAM5?  A friend of mine says he thought his /RAM5 was faster, but he wasn't
positive.
-------
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!