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From: tempest@wet.UUCP (Ken Lui)
Newsgroups: comp.sys.mac,comp.sys.mac.hardware
Subject: Re: Quantum ROM fix report
Message-ID: <788@wet.UUCP>
Date: 21 Nov 89 02:09:38 GMT
References: <14618@well.UUCP> <9323@batcomputer.tn.cornell.edu>
Reply-To: tempest@wet.UUCP (Ken Lui)
Followup-To: comp.sys.mac
Organization: Wetware Diversions, San Francisco
Lines: 19

In article <9323@batcomputer.tn.cornell.edu> eacj@tcgould.tn.cornell.edu (Julian Vrieslander) writes:
>I do notice that the drive will occasionally exercize its swing arm when
>there is no read/write going on.  Every few minutes there is a very brief
>sound, as if the arm makes one stroke and stops (I have not timed it).

From my understanding, this sound is caused by the internal
cache.  I have a ProDrive 105S as well, and the literature says
that its cache has a look-ahead feature.  When the drive's idle,
my guess is that it reads the "next" piece of data from the drive
and stores it in the cache.

Or so the tech support says who sold me my 105S.

Ken
-- 
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     Kenneth K.F. Lui	   |  UUCP:	...{ucsfcca|claris}!wet!tempest
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