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Date: Fri, 22 Oct 2010 12:00:56 +0100
From: Bruce Cran <bruce@cran.org.uk>
To: Tijl Coosemans <tijl@coosemans.org>
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Cc: freebsd-hackers@freebsd.org, Paul Wootton <paul@fletchermoorland.co.uk>
Subject: Re: Summary: Re: Spin down HDD after disk sync or before power off
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On Fri, 22 Oct 2010 12:07:36 +0200
Tijl Coosemans <tijl@coosemans.org> wrote:

> FreeBSD frequently accesses hard disks (log files, flushing dirty
> memory pages every 30s,...) and laptop drives tend to have aggressive
> power saving settings by default. That's why your load cycle is so
> high.

I'm not sure the APM value updates the idle3 timer inside the
drive: it may be necessary to run WD's wdidle3.exe tool to change the
power management timer.  And yes, people are rather annoyed that it's
necessary to have a copy of DOS to update the drive!

-- 
Bruce Cran