linux-kernel - Re: hdparm -M acoustic management for sata disks?

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Message-ID: <485D33A8.60200@rtr.ca>
Date:	Sat, 21 Jun 2008 13:00:24 -0400
From:	Mark Lord <lkml@....ca>
To:	Soeren Sonnenburg <kernel@....de>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: hdparm -M acoustic management for sata disks?

Mark Lord wrote:
>..
> Here's hdparm-8.9 on a drive that *does* support the feature:
> 
> 
> $ hdparm -I /dev/sda | grep Acoustic
>           *    Automatic Acoustic Management feature set
> 
> $ hdparm -M /dev/sda
> 
> /dev/sda:
> acoustic      = 254 (128=quiet ... 254=fast)
> 
> $ hdparm -M128 /dev/sda
> 
> /dev/sda:
> setting acoustic management to 128
> acoustic      = 128 (128=quiet ... 254=fast)
> 
> $ hdparm -M254 /dev/sda
> 
> /dev/sda:
> setting acoustic management to 254
> acoustic      = 254 (128=quiet ... 254=fast)
..

And one more:

$ hdparm -M0 /dev/sda

/dev/sda:
 setting acoustic management to 0
 acoustic      = 254 (128=quiet ... 254=fast)

$ hdparm -I /dev/sda | grep -i acoustic
        Recommended acoustic management value: 128, current value: 254
                Automatic Acoustic Management feature set

(the lack of a '*' on that last line indicates the feature is no longer enabled).

-ml
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