From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754375Ab2CIDQV (ORCPT ); Thu, 8 Mar 2012 22:16:21 -0500 Received: from tn-76-7-162-101.sta.embarqhsd.net ([76.7.162.101]:41387 "EHLO animx.eu.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752089Ab2CIDQT (ORCPT ); Thu, 8 Mar 2012 22:16:19 -0500 X-Greylist: delayed 691 seconds by postgrey-1.27 at vger.kernel.org; Thu, 08 Mar 2012 22:16:19 EST Date: Thu, 8 Mar 2012 22:04:47 -0500 From: Wakko Warner To: linux-kernel@vger.kernel.org Subject: Burning multiple DVDs at one time Message-ID: <20120309030446.GA24618@animx.eu.org> Mail-Followup-To: linux-kernel@vger.kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I'm having problems doing this. When I burn a single disk, wodim shows the drive buf @ 99% consistently. The instant that a 2nd disk is being burned, the drive buf on the first one starts to drop and data stops when the 2nd wodim is performing OPC. During the burn of both discs, the drive buf will drop on both until one of them finishes. Both drives see under runs. When one starts fixating, the other will hang until the fixation is completed. During the burns, the fifo of both never drop below 99% There are no logs that are produced. My burners are: [6:0:0:0] cd/dvd ATAPI iHAS422 8 4L11 /dev/sr7 [7:0:0:0] cd/dvd ATAPI iHAS224 B GL05 /dev/sr8 Both are SATA drives attached to the onboard sata controller 00:1f.2 SATA controller: Intel Corporation 631xESB/632xESB SATA AHCI Controller (rev 09) 00:1f.2 0106: 8086:2681 (rev 09) The kernel is a vanilla kernel v3.0.0. (This also happened with 2.6.35) I don't believe it matters, but the data is coming over NFS via gigabit ethernet. Each burn process uses a 768M host buffer. As I stated, the host fifo on wodim never goes below 99% The system motherboard is a SuperMicro X7DA8 -- Microsoft has beaten Volkswagen's world record. Volkswagen only created 22 million bugs.