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From: john@hpcvlo.HP.COM (John Eaton)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Hyperspace?
Message-ID: <1610025@hpcvlo.HP.COM>
Date: Mon, 3-Aug-87 12:18:37 EDT
Article-I.D.: hpcvlo.1610025
Posted: Mon Aug  3 12:18:37 1987
Date-Received: Thu, 6-Aug-87 02:20:14 EDT
References: <1246@killer.UUCP>
Organization: Hewlett-Packard Co., Corvallis, OR, USA
Lines: 16

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<      2)  How did they get the head to go faster?
<
Head speed is usually expressed in the number of milliseconds that it takes
to move the head one track. This number is highly dependent on the current
head speed but is normally given at the worst case of moving a head that is
complety stopped.

The trick is that if you are moving the head over multiple tracks you can 
step it at a faster rate once you have gotten it moving. Smart controllers 
will do this to save time on long seeks.


John Eaton
!hplabs!hp-pcd!john