Date: Tue, 23 Aug 2005 21:00:22 -0400 From: David Scheidt <dscheidt@panix.com> To: Stefan Bethke <stb@lassitu.de> Cc: freebsd-hackers@freebsd.org, m.ehinger@ltur.de Subject: Re: IBM Active Protection System Approach Message-ID: <20050824010022.GA19515@panix.com> In-Reply-To: <5051CE43-C8D3-41BD-9944-11EDFEA4300D@lassitu.de> References: <OF828DE8D9.036E29C8-ONC1257065.002A679F-C1257065.002CBB28@gateway-inter.net> <A95A177C-8C1B-47F6-8344-B818F6A97EAF@FreeBSD.org> <5051CE43-C8D3-41BD-9944-11EDFEA4300D@lassitu.de>
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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
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