Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752337AbYFUQzM (ORCPT ); Sat, 21 Jun 2008 12:55:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751228AbYFUQzA (ORCPT ); Sat, 21 Jun 2008 12:55:00 -0400 Received: from rtr.ca ([76.10.145.34]:2843 "EHLO mail.rtr.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751001AbYFUQy7 (ORCPT ); Sat, 21 Jun 2008 12:54:59 -0400 Message-ID: <485D3260.20301@rtr.ca> Date: Sat, 21 Jun 2008 12:54:56 -0400 From: Mark Lord Organization: Real-Time Remedies Inc. User-Agent: Thunderbird 2.0.0.14 (X11/20080505) MIME-Version: 1.0 To: Soeren Sonnenburg Cc: Linux Kernel Subject: Re: hdparm -M acoustic management for sata disks? References: <1214043295.17302.16.camel@localhost> <485D098E.3080109@rtr.ca> <1214066456.18959.6.camel@localhost> In-Reply-To: <1214066456.18959.6.camel@localhost> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1389 Lines: 42 Soeren Sonnenburg wrote: > > Just to be sure, did you mean grep acoustic (lowercase)? Because it is > listed there under Capabilities: > Recommended acoustic management value: 128, current value: 0 .. Ahh.. That part of the output just shows the "current setting field", which is zero (0) or "invalid" in your case. That's a display error in hdparm -- it probably shouldn't bother with that field when the feature is missing from the feature list that is given lower down in the output. (the reason it doesn't discard it today, is that early drives had the feature but didn't report it lower down.. but we can distinguish those drives by ATA version number now). 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) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/