From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755276AbXG1Q3V (ORCPT ); Sat, 28 Jul 2007 12:29:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752802AbXG1Q3P (ORCPT ); Sat, 28 Jul 2007 12:29:15 -0400 Received: from shawidc-mo1.cg.shawcable.net ([24.71.223.10]:23779 "EHLO pd4mo3so.prod.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752265AbXG1Q3O (ORCPT ); Sat, 28 Jul 2007 12:29:14 -0400 Date: Sat, 28 Jul 2007 10:29:06 -0600 From: Robert Hancock Subject: Re: Problems with reading DVD using 2.6.21.5 In-reply-to: To: Manuel Reimer Cc: linux-kernel@vger.kernel.org Message-id: <46AB6ED2.9050509@shaw.ca> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7bit References: User-Agent: Thunderbird 2.0.0.5 (Windows/20070716) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Manuel Reimer wrote: > Hello, > > I tried to reproduce this bug by mounting/unmounting the drive several > times. > > It seems like this problem is caused, if the drive is at speed 0 after > some time without access. In this situation, sometimes the drive seems > to take a bit longer to speed up. Whenever it takes a bit longer, I get > the error in dmesg and parts of the mounted disc are unreadable... > > Any chance to get this debugged? It's not entirely clear to me whether the kernel is doing any retries or not. It likely should be, but somebody more familiar with the block layer would likely have to answer whether it will be or not.. Certainly if we are already retrying and the drive keeps saying "no seek complete" there's not much the kernel can do about it.. -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@nospamshaw.ca Home Page: http://www.roberthancock.com/