NetNews Usenet Archive 1992 #27/NN_1992_27.iso/spool/comp/sys/ibm/pc/hardware/30479

Text File | 1992-11-20 | 1.6 KB | 35 lines

Newsgroups: comp.sys.ibm.pc.hardware
Path: sparky!uunet!mcsun!sun4nl!dutrun!donau!zen.et.tudelft.nl!wolff
From: [e-mail] (Rogier Wolff)
Subject: Re: Funny Quantum 240AT HD noise?
Message-ID: <[e-mail]>
Sender: [e-mail] (UseNet News System)
Nntp-Posting-Host: zen.et.tudelft.nl
Organization: Delft University of Technology, Dept. of Electrical Engineering
References: <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]>
Date: Fri, 20 Nov 1992 19:15:19 GMT
Lines: 22

[someone writes:]

>>>>I just bought the Quantum 240 AT hard disk drive. It has an on-board
>>>>256K cache, supposedly, and is supposed to be blinding fast. I haven't
>>>>really gotten a chance to test its speed, but I have noticed that
>>>>even when nothing's going on, it seems to make a chukka-chukka-chukka
>>>>sound about every ten seconds.
>>
>> I have a Quantum 120lps SCSI disk and it does the same thing.  I am not quite
>> sure what it is doing, but it does appear to be the normal thing for
>> Quantum's lps drives to do.

Quantums recalibrate their track alignment every time the temperature
changes a certain amount. I'm not sure wether they measure the temperature
or that they notice that their alignment is off. Anyway, that's what
they do. (you should notice that it starts out about once every 40 seconds,
and after a few hours it is limited to about once every 15 minutes>)

                Roger
--
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