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From: koko@uthub.toronto.edu (M. Kokodyniak)
Newsgroups: comp.sys.apple
Subject: Re:  Disk speed Diagnostic Software...
Message-ID: <352@uthub.toronto.edu>
Date: Thu, 18-Dec-86 16:55:27 EST
Article-I.D.: uthub.352
Posted: Thu Dec 18 16:55:27 1986
Date-Received: Thu, 18-Dec-86 22:25:19 EST
References: <8612090701.AA22466@cdfc.toronto.edu>
Organization: CSRI, University of Toronto
Lines: 20

> 
> 
> Probably the best Disk Speed test has been the LockSmith series.
> ...
> 
> But probably my favorite aspect is that it is graphic.  It draws a graph
> on the Hi-res screen, of the disk speed.  It makes it very easy to
> judge how far you are off, and how steady your drive speed actually is.
> ...
> 
> --Tak Ariga

This capability is great!  I was able to determine that my Fourth
Dimension drive has random speed variation -- it has a DC motor
whose speed is controlled by an internal centrifugal switch (like
a motor in a cheap 8-track tape deck) -- while my Shugart drive actually
has an approximately 0.5-hertz oscillation in the servo motor
feedback loop!

				Mike Kokodyniak