From mboxrd@z Thu Jan 1 00:00:00 1970 From: Denny Page Subject: Re: SCSI tape access on 2.6 kernels? Date: Wed, 25 Jan 2006 08:25:53 -0800 Message-ID: <43D7A691.1040606@cococafe.com> References: <43D604AD.6050607@ilsb.tuwien.ac.at> <43D69590.5050003@ilsb.tuwien.ac.at> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.cococafe.com ([64.142.30.235]:59777 "EHLO mail.cococafe.com") by vger.kernel.org with ESMTP id S1750823AbWAYQ0A (ORCPT ); Wed, 25 Jan 2006 11:26:00 -0500 In-Reply-To: Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Chip Coldwell Cc: Gerhard Schneider , Kai Makisara , linux-scsi@vger.kernel.org I agree. In my case, the problem is also initial negation: 3 MB/s :-(. Denny Chip Coldwell wrote: > I'm curious -- what was the impact on performance of disabling direct > I/O in your case? > > I agree with Kai that the biggest performance hit is the 20 MB/s > negotiated bus speed. > > Chip >