From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yossi Down-Under Subject: Re: ide cdrom performance issue Date: 08 Oct 2003 17:28:40 +0200 Sender: linux-ide-owner@vger.kernel.org Message-ID: <1065626920.1641.24.camel@server> References: <1065375332.1355.9.camel@server> <20031006073732.GV966@suse.de> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from ctb-mesg4.saix.net ([196.25.240.76]:39653 "EHLO ctb-mesg4.saix.net") by vger.kernel.org with ESMTP id S261660AbTJHP2u (ORCPT ); Wed, 8 Oct 2003 11:28:50 -0400 In-Reply-To: <20031006073732.GV966@suse.de> List-Id: linux-ide@vger.kernel.org To: Jens Axboe Cc: linux-ide@vger.kernel.org On Mon, 2003-10-06 at 09:37, Jens Axboe wrote: > On Sun, Oct 05 2003, Yossi Down-Under wrote: > > Running RH9 with xcdroast and three recorders each on its own ide > > channel configured for ide-scsi. Having trouble with buffer underruns. > > Am told by xcdroast author that it is a kernel ide driver issue, > > specifically not using dma for transfers and recommended I try a newer > > kernel. > > > > My question is whether the 2.5.75 kernel is going to improve this > > situation before going to the trouble to install it? > > 2.5.75?! That kernel is ancient, you should download 2.6-test6 and give > that a try. Note that you should not then use ide-scsi (don't config it > in), and you need to give -dev=/dev/hdc as device argument to cdrecord. > Replace hdc with whatever is your cd-r drive. OK, I did this. There must be some new package for module management required that is not in RH9 as it failed to load the network module when booted so I just compiled it into the kernel instead. The problem I have now is that without using ide-scsi, xcdroast 0.98alpha14 doesn't see the drive. Will the ide-scsi driver also gain the use of dma transfers or should I go back to the xcdroast author to modify the program to use ide drives without scsi emulation? Thanks, L. Baker