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From: drp@buhub.bradley.edu (Douglas Pokorny)
Subject: Re: Hard Disk Drive Select LED Always ON.
Message-ID: <1991May6.205149.4598@bradley.bradley.edu>
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Organization: Bradley University
References: <1991May6.173455.23945@ibmpcug.co.uk>
Date: Mon, 6 May 91 20:51:49 GMT
Lines: 22

The design of the AT hard disk controller is done in a manner
in which the drive select latches until another drive is made active.
This is claimed to be a feature which increases the speed of the
hard drive. (The computer doesn't have to wait for the disk 
to respons to the drive select if it is always selected)  Whether
or not there is any benefit is of dubious value.  Most clone
controllers have the option to disable this, and use the "normal"
XT style of drive accesses.  Unless you are staring at the front
of the drives, and find the constant light anoying, don't bother
with it.


_________________________________________________________
 ________   ___    ___  
|_   __  \ |   |  |   |   Douglas R. Pokorny
  | |__| /  | |    | |    drp@buhub.bradley.edu
  |  __  \  | |    | |    CS major/Geisert Hall Resident
 _| |__|  | |  \__/  |    The best of both worlds!
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  Bradley   University    "The Harvard of the Midwest"