From owner-freebsd-hackers@FreeBSD.ORG Sat Aug 20 03:59:51 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 D4E9B16A41F for ; Sat, 20 Aug 2005 03:59:51 +0000 (GMT) (envelope-from ambrisko@ambrisko.com) Received: from mail.ambrisko.com (mail.ambrisko.com [64.174.51.43]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8A67843D46 for ; Sat, 20 Aug 2005 03:59:51 +0000 (GMT) (envelope-from ambrisko@ambrisko.com) Received: from server2.ambrisko.com (HELO www.ambrisko.com) ([192.168.1.2]) by mail.ambrisko.com with ESMTP; 19 Aug 2005 20:59:51 -0700 Received: from ambrisko.com (localhost [127.0.0.1]) by www.ambrisko.com (8.12.11/8.12.9) with ESMTP id j7K3xpZM015719; Fri, 19 Aug 2005 20:59:51 -0700 (PDT) (envelope-from ambrisko@ambrisko.com) Received: (from ambrisko@localhost) by ambrisko.com (8.12.11/8.12.11/Submit) id j7K3xoHF015718; Fri, 19 Aug 2005 20:59:50 -0700 (PDT) (envelope-from ambrisko) From: Doug Ambrisko Message-Id: <200508200359.j7K3xoHF015718@ambrisko.com> In-Reply-To: <43060FA4.5080807@elischer.org> To: Julian Elischer Date: Fri, 19 Aug 2005 20:59:50 -0700 (PDT) X-Mailer: ELM [version 2.4ME+ PL94b (25)] MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII Cc: freebsd-hackers@freebsd.org Subject: Re: Parking disk drive heads 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: Sat, 20 Aug 2005 03:59:51 -0000 Julian Elischer writes: | just placing an unmounted drive down on a hard table, even when | not running, can ruin it. We lost hundreds that way at Whistle until | we did a failure analysis. Just placing a rubber mat on the table. | fixed it and instructing the staff to always put the drives on | a soft surface made the problem go right away. Not quite. Burn-in helped more. A few were head slaps but more was just media that needed exercising. It's the "lands minds" that bite you more when it has swap or other critical data on it. A little historical correction. Flash is nice but it has some issues. Atleast dropping it isn't one! Doug A.