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Date: Tue, 27 Sep 2005 16:08:41 +0200
From: Alexander Leidinger <Alexander@Leidinger.net>
To: Daniel Eriksson <daniel_k_eriksson@telia.com>
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Cc: Emanuel Strobl <Emanuel.strobl@gmx.net>, freebsd-current@freebsd.org
Subject: RE: ATA power savings...
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Daniel Eriksson <daniel_k_eriksson@telia.com> wrote:

> Emanuel Strobl wrote:
>
>> since ataidle from ports doesn't work with ATAmkIII
>
> Another feature of ataidle is the ability to set the acoustic management
> bits. Typical ATA disks ship with acoustic management turned on, which
> results in lower performance but less noise (5-15% slower seek
> performance seems to be normal with AM turned on).
>
> It would be nice if ataidle could be made to work with ATAmkIII so that
> I could turn off acoustic management on the ATA disks I have in my
> servers.

Hmmm... IO flow at the device level reported via the communication channel
powerd uses to do automatic noise and power management comes into my mind...

Do we have the necessary infrastructure (IO reporting for devices) for this
(in GEOM/gstat?)?

Bye,
Alexander.

-- 
http://www.Leidinger.net  Alexander @ Leidinger.net: PGP ID = B0063FE7
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