From owner-freebsd-hackers@FreeBSD.ORG Wed Aug 24 01:00:23 2005 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E5F1216A41F for ; Wed, 24 Aug 2005 01:00:23 +0000 (GMT) (envelope-from dscheidt@panix.com) Received: from mail1.panix.com (mail1.panix.com [166.84.1.72]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6F57343D45 for ; Wed, 24 Aug 2005 01:00:23 +0000 (GMT) (envelope-from dscheidt@panix.com) Received: from panix1.panix.com (panix1.panix.com [166.84.1.1]) by mail1.panix.com (Postfix) with ESMTP id 7E432597D2; Tue, 23 Aug 2005 21:00:22 -0400 (EDT) Received: (from dscheidt@localhost) by panix1.panix.com (8.11.6p3/8.8.8/PanixN1.1) id j7O10MH00988; Tue, 23 Aug 2005 21:00:22 -0400 (EDT) Date: Tue, 23 Aug 2005 21:00:22 -0400 From: David Scheidt To: Stefan Bethke Message-ID: <20050824010022.GA19515@panix.com> References: <5051CE43-C8D3-41BD-9944-11EDFEA4300D@lassitu.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5051CE43-C8D3-41BD-9944-11EDFEA4300D@lassitu.de> User-Agent: Mutt/1.5.9i Cc: freebsd-hackers@freebsd.org, m.ehinger@ltur.de Subject: Re: IBM Active Protection System Approach X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Aug 2005 01:00:24 -0000 On Tue, Aug 23, 2005 at 01:06:18AM +0200, Stefan Bethke wrote: > > Early reports from Mac enthusiast sites (and I believe similar > reports from IBM users) indicate that the hysteresis is so small that > gently pounding the table the notebook is sitting on will make the > drive park the heads, and lead to 10 to 20 seconds delay before the > drive can be accessed again. Watching the real time status of IBM APS shows that my T42 will auto ignore "repetiive shock", of hte sort that I can cause by holding the thing in my lap and and typing this message with a little more force than I normally hit the keys. > > Given how tightly coupled mechanically the HD in most notebooks is to > it's shell, it seems a very good idea to pursue. > > If you have access to a new(ish) PowerBook, I recommend checking out > http://www.kernelthread.com/software/ams/. The sensitivity of the > accelerometer is truely astounding. (For those who haven't seen it: > you turn the notebook, and the demo window is turned so it stays > level. It takes *really* small movements to confuse the system.) > The IBM ThinkPads have a similiar applicaiton in the Active protection system properties control panel, under the real-time status tab. It's pretty cool to watch. David