From owner-freebsd-current@FreeBSD.ORG Mon Aug 25 16:43:52 2003 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 679EA16A4BF for ; Mon, 25 Aug 2003 16:43:52 -0700 (PDT) Received: from srv1.cosmo-project.de (srv1.cosmo-project.de [213.83.6.106]) by mx1.FreeBSD.org (Postfix) with ESMTP id 340FB43FE1 for ; Mon, 25 Aug 2003 16:43:51 -0700 (PDT) (envelope-from ticso@cicely12.cicely.de) Received: from cicely5.cicely.de (cicely5.cicely.de [IPv6:3ffe:400:8d0:301:200:92ff:fe9b:20e7]) (authenticated bits=0) by srv1.cosmo-project.de (8.12.9/8.12.9) with ESMTP id h7PNhfaK059825 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=OK); Tue, 26 Aug 2003 01:43:46 +0200 (CEST) (envelope-from ticso@cicely12.cicely.de) Received: from cicely12.cicely.de (cicely12.cicely.de [IPv6:3ffe:400:8d0:301::12]) by cicely5.cicely.de (8.12.9/8.12.9) with ESMTP id h7PNhd9B021149 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 26 Aug 2003 01:43:39 +0200 (CEST) (envelope-from ticso@cicely12.cicely.de) Received: from cicely12.cicely.de (localhost [127.0.0.1]) by cicely12.cicely.de (8.12.9/8.12.9) with ESMTP id h7PNhdDb036300; Tue, 26 Aug 2003 01:43:39 +0200 (CEST) (envelope-from ticso@cicely12.cicely.de) Received: (from ticso@localhost) by cicely12.cicely.de (8.12.9/8.12.9/Submit) id h7PNhca6036299; Tue, 26 Aug 2003 01:43:38 +0200 (CEST) Date: Tue, 26 Aug 2003 01:43:38 +0200 From: Bernd Walter To: Lars Eggert Message-ID: <20030825234337.GM39362@cicely12.cicely.de> References: <3F4AD502.5010709@isi.edu> <3F4A7B91.8070803@isi.edu> <20030825223418.GJ39362@cicely12.cicely.de> <3F4A9A51.4000002@isi.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3F4A9A51.4000002@isi.edu> X-Operating-System: FreeBSD cicely12.cicely.de 5.1-CURRENT alpha User-Agent: Mutt/1.5.4i cc: ticso@cicely.de cc: current Subject: Re: panic with CF drive + USB reader X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: ticso@cicely.de List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 25 Aug 2003 23:43:52 -0000 On Mon, Aug 25, 2003 at 04:22:57PM -0700, Lars Eggert wrote: > It seems that this happens under light or no load only. I had been doing > a heavy cycle of dump/restore/dd, etc, and all was well. Could it be > that the MicroDrive does some kind of internal power management that > delays its reponses some, and the kernel doesn't expect that? Yes microdrives stop spinning when idle for a while to save energy for batterie powered devices and possibly to decrease wear. That could explain on how to trigger this problem. Handling should have been done transparently by your reader. Is your reader declared to support microdrives? -- B.Walter BWCT http://www.bwct.de ticso@bwct.de info@bwct.de