From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1SScGi-0006Y9-CU for garchives@archives.gentoo.org; Thu, 10 May 2012 22:55:32 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id E8506E0C35; Thu, 10 May 2012 22:55:18 +0000 (UTC) Received: from mail-lpp01m010-f53.google.com (mail-lpp01m010-f53.google.com [209.85.215.53]) by pigeon.gentoo.org (Postfix) with ESMTP id BF217E0C88 for ; Thu, 10 May 2012 22:53:48 +0000 (UTC) Received: by lagu2 with SMTP id u2so1662549lag.40 for ; Thu, 10 May 2012 15:53:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date :x-google-sender-auth:message-id:subject:to:content-type; bh=B7NqI1Rxa3YqrILeMEEPgHyHrMC2YHYJkQ3bn+uzQOM=; b=SGztLwSsuJGhseorPanymremzvHEWbepj8YNYaevxLObaGgYaDPDL9Q7uCgG1XwMvH 1dRynF8z1xyVvOwTqdvQKBtEMBkEU2IY+MKBvl9ffDVB+PogdsLaiVYb9cMpYVQ/hrGx k2YLX1mCil2nsczJ6VT4zS6JVkM7eB2uTKbxCVn66WG1OZOf73+vRnWvrfrjSETfYRUQ nQYLGzqLd5ncC+eNPJwdVJOnQKSk2SBCCtZsN69cxrFBhm/DpUG+ulnl90im1uDNcLG5 xxokEf4K2+AlDtL5z10C3YT+SVgiEZ0u8sNZLy3mX1oDjKb3heSc9+Gh22HMxnQFxb7o dOag== Received: by 10.152.105.19 with SMTP id gi19mr6183477lab.11.1336690427771; Thu, 10 May 2012 15:53:47 -0700 (PDT) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Sender: paul.hartman@gmail.com Received: by 10.112.35.108 with HTTP; Thu, 10 May 2012 15:53:27 -0700 (PDT) In-Reply-To: <20120510115541.GA20233@squareownz.org> References: <4FAA2F0D.8080900@gmail.com> <20120509112543.6021e1f8@khamul.example.com> <4FAA3E79.5010007@gmail.com> <20120509232806.495276ed@khamul.example.com> <4FAAEEB4.6090800@gmail.com> <4FAB04B7.8060306@gmail.com> <20120510115541.GA20233@squareownz.org> From: Paul Hartman Date: Thu, 10 May 2012 17:53:27 -0500 X-Google-Sender-Auth: Lr3Uiiz_128i73puM8eGY_izQ9k Message-ID: Subject: Re: [gentoo-user] Are those "green" drives any good? To: gentoo-user@lists.gentoo.org Content-Type: text/plain; charset=ISO-8859-1 X-Archives-Salt: b302bf21-8c65-48c9-8954-a834bb9ea143 X-Archives-Hash: 4eecbb40d71a261890b34c781c20f146 On Thu, May 10, 2012 at 6:55 AM, wrote: > > hum hum! > I know that Windows does this by default (it annoys me so I disable it) > but does linux disable or stop running the disks if they're inactive? > I'm assuming there's an option somewhere - maybe just `unmount`! Some drives cannot have this spindown "feature" disabled, because it is a fixed value in their firmware in order to be "green"... You can adjust the power management setting with hdparm, and on some drives this allows disabling the spindown or disabling power management altogether. On my HDDs, I cannot disable APM but I can disable spindown by changing the power-saving level to 254. I have a script in /etc/local.d/ which calls: hdparm -B 254 /dev/sd[abcdef] at boot time. To quote the hdparm manpage: "A low value means aggressive power management and a high value means better performance. Possible settings range from values 1 through 127 (which permit spin-down), and values 128 through 254 (which do not permit spin-down). The highest degree of power management is attained with a setting of 1, and the highest I/O performance with a setting of 254. A value of 255 tells hdparm to disable Advanced Power Management altogether on the drive (not all drives support disabling it, but most do)."