Re: DASD performance curve graphs??

["Al Barsa, Jr." <barsa2@xxxxxxx>]

At 09:53 AM 1/6/99 -0500, you wrote:
>
>Al, 
>
>I've not looked at this kind of analysis in YEARS...but also reality says
>I'm not going to be buying DASD at 40% utilization either....:)
>
>Don
>
>
>> 
>> With all due respect, we consider the knee of the curve to be about 40%.
>> 
I misunderstood your comment.

40% is the percentage that the arms are busy, not the percentage full.
Look at the column on the right of WRKDSKSTS.  As the disks get full to
typically 70% or 80%, this will increase the % busy.  The big issue today
is that if you buy less arms with higher capacity, the percentage busy goes
up at a very fast rate.  The DASD industry has just figured out that they
can create a 35GB device in a 3 1/2 form factor for the same cost of a 2 GB
in the same form factor.


Al




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Al Barsa, Jr. - Account for Midrange-L
Barsa Consulting, LLC.  
400 > 390

Phone:  914-251-1234
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