From owner-freebsd-current@FreeBSD.ORG Tue Mar 17 12:29:15 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5F967106568A for ; Tue, 17 Mar 2009 12:29:15 +0000 (UTC) (envelope-from yanefbsd@gmail.com) Received: from wf-out-1314.google.com (wf-out-1314.google.com [209.85.200.174]) by mx1.freebsd.org (Postfix) with ESMTP id 31BB28FC25 for ; Tue, 17 Mar 2009 12:29:15 +0000 (UTC) (envelope-from yanefbsd@gmail.com) Received: by wf-out-1314.google.com with SMTP id 27so3507899wfd.7 for ; Tue, 17 Mar 2009 05:29:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=EuG3w/v0LPzohxcN+H38ernCLuSET0iQkhZjRsJuoHY=; b=PEFkp45S3iE62SIzi5wc6b1R+65fvQYl9AX0i70eGZhBPSJtHpLmQ/oufAoVTss/Lt +nyGRbun6M8XrtzC5AFrWpKeOqXb1qcWfduW5zKvPkA2U6amq4EAO6q4w7oP7hwRN2/H Xsb8/+yC/jvISdWaNVAjCNybkJbZj79qloDkk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=L1WnEqpfUmg9lfUFjoAht9jMibsn8DeLxYlDipKJjSQnnWPKu6qNlpbTpl7zKK8/zL q2v1xnP3TRgjKarDFaXYaAetSjhnkaPZumeDn7osFCZNsZMwrJpQjcb2gRsFr5raU57d HwafgylCNQu4kZdrO0ytX9X27ZSbJPkgL6DCQ= MIME-Version: 1.0 Received: by 10.143.18.21 with SMTP id v21mr2741523wfi.336.1237292955124; Tue, 17 Mar 2009 05:29:15 -0700 (PDT) In-Reply-To: <7d6fde3d0903170528g656e9edfn4fe5afc013c42999@mail.gmail.com> References: <49BE7C5A.2080103@icyb.net.ua> <49BEB449.9090302@googlemail.com> <7d6fde3d0903170528g656e9edfn4fe5afc013c42999@mail.gmail.com> Date: Tue, 17 Mar 2009 05:29:15 -0700 Message-ID: <7d6fde3d0903170529u54d76afaiafc3db490aab8558@mail.gmail.com> From: Garrett Cooper To: "army.of.root" Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-current@freebsd.org, Andriy Gapon Subject: Re: ata: printf on every spinup/spindown? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 17 Mar 2009 12:29:15 -0000 On Tue, Mar 17, 2009 at 5:28 AM, Garrett Cooper wrote: > On Mon, Mar 16, 2009 at 1:19 PM, army.of.root > wrote: >> Andriy Gapon wrote: >>> >>> I am playing with ata spindown feature and I think that it is really >>> unnecessary >>> to print a message each time ata driver is going to spindown a disk or let >>> it be >>> spinned up: >>> ad6: Idle, spin down >>> ad6: request while spun down, starting. >>> ad6: drive spun down. >>> ad6: Idle, spin down >>> ad6: request while spun down, starting. >>> >>> Especially this is not useful when "Idle, spin down" messages are going >>> spin up >>> the disk via syslog logging to disk :-) >>> >>> Maybe put these under verboseboot if not drop entirely? >>> >> >> Hi, >> >> yah, I had some unpleasant experience with spinning down disks. That really >> is only useful for backup disks or similar disks which are not accessed >> frequently or used by any programs. >> >> :) The HDD consumes in Idle mode only something like 1W so it isnt really >> economic to spin it down. > > Spinning down to a lower RPM seems legitimate, compared to spinning it > down, which kills the drives. Look at WD's green drives -- they claim > to get 30% ~ 50% better power efficiency than standard drives. > > It may not seem like much, but HDD's really kill laptop batteries and > also really suck up juice in data centers. Any way to reduce energy > consumption without killing off hardware is really good in my book > 8-). > > Thanks PHK! Err... Andriy :P! > -Garrett