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Date: Thu, 4 Feb 2010 03:44:33 +0100
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To: Warren Block <wblock@wonkity.com>
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Cc: freebsd-hackers@freebsd.org, Oliver Fromme <olli@lurza.secnetix.de>,
	jkim@freebsd.org, alexbestms@wwu.de
Subject: Re: Spin down HDD after disk sync or before power off
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On 3 February 2010 21:44, Warren Block <wblock@wonkity.com> wrote:
> Are there any other device drivers that differentiate the reboot and
> poweroff actions that could be used as inspiration or simply shamelessly
> copied in modifying ata-disk?
>

I don't know about FreeBSD drivers, but I used NetBSD briefly on my
notebook, and I noticed that it spun the disk down properly before
poweroff.  It was a very distinctive sound from what FreeBSD made on
shutdown -p.  So perhaps you could see how NetBSD guys do it and get
some ideas from there?

~ Ondra