From owner-freebsd-stable@FreeBSD.ORG Wed Jan 27 23:55:54 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 89D2F106566C for ; Wed, 27 Jan 2010 23:55:54 +0000 (UTC) (envelope-from aw1@swelter.hanley.stade.co.uk) Received: from v-smtp-auth-relay-3.gradwell.net (v-smtp-auth-relay-3.gradwell.net [79.135.125.42]) by mx1.freebsd.org (Postfix) with ESMTP id E99528FC12 for ; Wed, 27 Jan 2010 23:55:53 +0000 (UTC) Received: from 93-97-22-18.zone5.bethere.co.uk ([93.97.22.18] helo=swelter.hanley.stade.co.uk country=GB ident=postmaster&pop3^stade^co&uk) by v-smtp-auth-relay-3.gradwell.net with esmtpa (Gradwell gwh-smtpd 1.290) id 4b60d288.5f8a.a5 for freebsd-stable@freebsd.org; Wed, 27 Jan 2010 23:55:52 +0000 (envelope-sender ) Received: from swelter.hanley.stade.co.uk (localhost [127.0.0.1]) by swelter.hanley.stade.co.uk (8.14.3/8.14.3) with ESMTP id o0RNtnT2045311 for ; Wed, 27 Jan 2010 23:55:49 GMT (envelope-from aw1@swelter.hanley.stade.co.uk) Received: (from aw1@localhost) by swelter.hanley.stade.co.uk (8.14.3/8.14.3/Submit) id o0RNtnwE045310 for freebsd-stable@freebsd.org; Wed, 27 Jan 2010 23:55:49 GMT (envelope-from aw1) Date: Wed, 27 Jan 2010 23:55:49 +0000 From: Adrian Wontroba To: FreeBSD-STABLE Mailing List Message-ID: <20100127235549.GA44968@swelter.hanley.stade.co.uk> Mail-Followup-To: Adrian Wontroba , FreeBSD-STABLE Mailing List References: <4B6022C6.1090608@andric.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4B6022C6.1090608@andric.com> User-Agent: Mutt/1.4.2.3i X-Operating-System: FreeBSD 8.0-STABLE Organization: Oh dear, I've joined one again. X-Virus-Scanned: clamav-milter 0.95.3 at swelter.hanley.stade.co.uk X-Virus-Status: Clean Subject: Re: immense delayed write to file system (ZFS and UFS2), performance issues X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: aw1@stade.co.uk List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Jan 2010 23:55:54 -0000 On Wed, Jan 27, 2010 at 12:25:58PM +0100, Dimitry Andric wrote: > On 2010-01-27 00:15, Dan Naumov wrote: > Sorry to bump into this thread so late, but for some of my servers I > have been using a patch for atacontrol, to turn the APM features of the > disk(s) off, for a long time. This is mostly noticable with 2.5" > notebook disks, which "click" like crazy all the time. :) Turning off APM seems to be the LINUX world's solution to this and other similar problems. I got the impression that Windows also does this. -- Adrian Wontroba Save energy: be apathetic.