From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261981AbULMIFg (ORCPT ); Mon, 13 Dec 2004 03:05:36 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262056AbULMIFf (ORCPT ); Mon, 13 Dec 2004 03:05:35 -0500 Received: from penta.pentaserver.com ([216.74.97.66]:34784 "EHLO penta.pentaserver.com") by vger.kernel.org with ESMTP id S261981AbULMIF3 (ORCPT ); Mon, 13 Dec 2004 03:05:29 -0500 From: Manu Abraham Reply-To: manu@kromtek.com Organization: Kromtek Systems To: linux-kernel@vger.kernel.org Subject: Re: [WISHLIST] IBM HD Shock detection in Linux Date: Mon, 13 Dec 2004 12:05:27 +0400 User-Agent: KMail/1.6.2 References: <1102888882.15558.2.camel@ksyrium.local> <1102889485.15558.5.camel@ksyrium.local> In-Reply-To: MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200412131205.27786.manu@kromtek.com> X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - penta.pentaserver.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [0 0] / [47 12] X-AntiAbuse: Sender Address Domain - kromtek.com X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon December 13 2004 2:15 am, Jan Engelhardt wrote: > >> >The code apparently can display the horizon, but cannot prevent > >> >shocks :( > >> > >> How can something prevent a shock if it does not know before? What I > >> mean is that if I smack a harddrive, it can hardly evade it... nor can > >> it prevent me from smacking it. > > > >It can only prevent shocks when it detects tilts... like when the laptop > >shakes in a moving vehicle for example.. > > Ah that's reasonable, like I'm dropping it (will probably tilt due to > physics) and then hit the ground. > But what will it do to prevent against the schock, now that it knows it is > tilted? When a tilt is detected, it would park the heads ? so that it would not affected from the larger shock ? The platter/head is affected in a case where the arm swings away, even from the powerful magnet to crash against the platter. If the arm is locked, such that it does not move when a tilt is detected, (The tilt before the shock) the arm is parked and locked (more locking than the simple magnet) ? Manu > > > > Jan Engelhardt