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Sender: Alexander Motin <mavbsd@gmail.com>
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Date: Thu, 26 Nov 2009 11:09:05 +0200
From: Alexander Motin <mav@FreeBSD.org>
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To: Denis Shaposhnikov <dsh@wizard.volgograd.ru>
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Cc: freebsd-stable@freebsd.org
Subject: Re: how to disable APM using camcontrol cmd
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Denis Shaposhnikov wrote:
> I'm trying to replace sysutils/ataidle which doesn't work with new
> acpi(4). May be somebody could tell me args for
> 
>   camcontrol cmd ada0 -a cmd XX XX XX XX XX XX XX XX
> 
> to disable APM and acoustic management (AAM) for my HDD?

To set APM level:
camcontrol cmd ada0 -a "EF 05 00 00 00 00 00 00 00 00 xx 00"
To disable it:
camcontrol cmd ada0 -a "EF 85 00 00 00 00 00 00 00 00 00 00

To set AAM level:
camcontrol cmd ada0 -a "EF 42 00 00 00 00 00 00 00 00 xx 00"
To disable it:
camcontrol cmd ada0 -a "EF C2 00 00 00 00 00 00 00 00 00 00

You can check result with:
camcontrol identify ada0

-- 
Alexander Motin