From owner-freebsd-current@FreeBSD.ORG Thu Apr 17 13:46:24 2008 Return-Path: Delivered-To: current@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 19965106567F for ; Thu, 17 Apr 2008 13:46:24 +0000 (UTC) (envelope-from rwatson@FreeBSD.org) Received: from cyrus.watson.org (cyrus.watson.org [209.31.154.42]) by mx1.freebsd.org (Postfix) with ESMTP id ECA698FC15 for ; Thu, 17 Apr 2008 13:46:23 +0000 (UTC) (envelope-from rwatson@FreeBSD.org) Received: from fledge.watson.org (fledge.watson.org [209.31.154.41]) by cyrus.watson.org (Postfix) with ESMTP id 723D946B66; Thu, 17 Apr 2008 09:46:23 -0400 (EDT) Date: Thu, 17 Apr 2008 14:46:23 +0100 (BST) From: Robert Watson X-X-Sender: robert@fledge.watson.org To: sos@FreeBSD.org Message-ID: <20080417144424.D71628@fledge.watson.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: current@FreeBSD.org Subject: ATA problem in Parallels: warnings -> failures X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Apr 2008 13:46:24 -0000 Dear Soren, Since my most recent kernel update, the intermittent TIMEOUT - READ_DMA warnings I get on my parallels install appear to have become somewhat less innocuous: ad0: TIMEOUT - READ_DMA retrying (1 retry left) LBA=38669679 ad0: FAILURE - already active DMA on this device ad0: setting up DMA failed g_vfs_done():ad0s1e[READ(offset=18188230656, length=2048)]error = 5 cvs update: in directory modules/tx: cvs [update aborted]: cannot read CVS/Repository: Input/output error In the past, this appeared to be a symptom of long and unexplained delays in Parallel's ATA -> image file operation, but were not harmful as the retried operation succeeded. However, it seems that this is no longer the case, with errors exposed to higher levels of the file system. Do you have any suggestions? Robert N M Watson Computer Laboratory University of Cambridge