Article View: comp.sys.mac
Article #42515Seagate drive self-seeking -- what is the truth?
From: Olle Furberg
Date: Sun, 14 May 1989 01:34
Date: Sun, 14 May 1989 01:34
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1683 bytes
In article <102@mountn.dec.com> minow%thundr.dec@decwrl.dec.com (Martin Minow) writes:
>Summary: people notice that their 3.5 inch Quantum (40/80 Mbyte)
>disks occassionally do some I/O without any prompting from the
>host. They asked why. I talked with my local Quantum technical
>support person. Here's his answer:
> [---]
>Quantum drives contain a thermistor that triggers recalibration when
>the temperature changes by 2 degrees-Celsius. Recalibration is also
> [---]
I have an Apple HD40 with a Seagate 3.5 inch drive (Seagate ST-157N).
It behaves in the same way, I/O every 20 minutes. It's a bit irritating
because I have the HD under my bed. However, if I park the heads the
seeking stops.
Note: It's in the HD, because:
1. It does not depend on MultiFinder or any exotic inits:
I've tried the good old System 3.2 without any inits: it's still there.
2. It continues even if I turn off the Mac
Does Martin's explanation also apply to Seagate drives?
/Olle
PS. Driver software: Apple's HD SC Installer version 2.0
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<2676@osiris.sics.se>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!uunet!mcvax!kth!sunic!sics.se!ollefReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!uunet!mcvax!kth!sunic!sics.se!ollef From: ollef@osiris.sics.se (Olle Furberg) Newsgroups: comp.sys.mac Subject: Seagate drive self-seeking -- what is the truth? Summary: What about Seagate drives? Keywords: Quantum, Seagate Message-ID: <2676@osiris.sics.se> Date: 14 May 89 01:34:46 GMT References: <4267@ucdavis.ucdavis.edu> <102@mountn.dec.com> Reply-To: ollef@sics.se (Olle Furberg) Organization: Swedish Institute of Computer Science, Kista Lines: 29 Was: "Quantum drive self-seeking -- the truth"