From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S940554AbXHIOxY (ORCPT ); Thu, 9 Aug 2007 10:53:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S935348AbXHIOxQ (ORCPT ); Thu, 9 Aug 2007 10:53:16 -0400 Received: from agminet01.oracle.com ([141.146.126.228]:58331 "EHLO agminet01.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935298AbXHIOxP (ORCPT ); Thu, 9 Aug 2007 10:53:15 -0400 Message-ID: <46BB2A49.5090503@oracle.com> Date: Thu, 09 Aug 2007 10:52:57 -0400 From: Chuck Lever Reply-To: chuck.lever@oracle.com Organization: Corporate Architecture, Linux Projects Group User-Agent: Thunderbird 2.0.0.5 (X11/20070719) MIME-Version: 1.0 To: Alan Cox CC: linux-kernel@vger.kernel.org Subject: Re: DMA CRC errors with SiS chipset and notebook drive References: <46BB190E.2030102@oracle.com> <20070809155324.3a9499ca@the-village.bc.nu> In-Reply-To: <20070809155324.3a9499ca@the-village.bc.nu> Content-Type: multipart/mixed; boundary="------------050500080300090103030201" X-Brightmail-Tracker: AAAAAQAAAAI= X-Brightmail-Tracker: AAAAAQAAAAI= X-Whitelist: TRUE X-Whitelist: TRUE Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org This is a multi-part message in MIME format. --------------050500080300090103030201 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Alan Cox wrote: >> Aug 9 07:41:29 monet kernel: ata1.00: limiting speed to UDMA/66:PIO4 >> Aug 9 07:41:29 monet kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr >> 0x0 action 0x2 >> Aug 9 07:41:29 monet kernel: ata1.00: (BMDMA stat 0x64) >> Aug 9 07:41:29 monet kernel: ata1.00: cmd >> c8/00:08:fb:7c:a1/00:00:00:00:00/e0 tag 0 cdb 0x12 data 4096 in >> Aug 9 07:41:29 monet kernel: res >> 51/84:00:00:00:00/00:00:00:00:00/e0 Emask 0x10 (ATA bus error) >> Aug 9 07:41:29 monet kernel: ata1: soft resetting port >> Aug 9 07:41:29 monet kernel: ata1.00: configured for UDMA/66 >> Aug 9 07:41:29 monet kernel: ata1.01: configured for UDMA/33 >> Aug 9 07:41:29 monet kernel: ata1: EH complete > > Drops to UDMA33 for 40 wire cable. It drops from UDMA/100 to UDMA/66 for the disk, but stays at UDMA/33 for the optical drive. If I have only the disk on that controller, the disk still drops to UDMA/66. > Looks to me like your cabling is out of spec or you have electrical noise > problems. I've tried different cabling solutions, including round and flat IDE cables. What might cause "electrical noise"? Are 44-40 pin adapters reliable? --------------050500080300090103030201 Content-Type: text/x-vcard; charset=utf-8; name="chuck.lever.vcf" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="chuck.lever.vcf" begin:vcard fn:Chuck Lever n:Lever;Chuck org:Oracle Corporation;Corporate Architecture: Linux Projects Group adr:;;1015 Granger Avenue;Ann Arbor;MI;48104;USA title:Principal Member of Staff tel;work:+1 248 614 5091 x-mozilla-html:FALSE url:http://oss.oracle.com/~cel version:2.1 end:vcard --------------050500080300090103030201--