From mboxrd@z Thu Jan 1 00:00:00 1970 From: Patrick Mansfield Subject: Re: SCSI tape access on 2.6 kernels? Date: Tue, 24 Jan 2006 12:23:06 -0800 Message-ID: <20060124202306.GA8422@us.ibm.com> References: <43D604AD.6050607@ilsb.tuwien.ac.at> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from e32.co.us.ibm.com ([32.97.110.150]:63699 "EHLO e32.co.us.ibm.com") by vger.kernel.org with ESMTP id S932440AbWAXUXk (ORCPT ); Tue, 24 Jan 2006 15:23:40 -0500 Received: from westrelay02.boulder.ibm.com (westrelay02.boulder.ibm.com [9.17.195.11]) by e32.co.us.ibm.com (8.12.11/8.12.11) with ESMTP id k0OKNeNF009620 for ; Tue, 24 Jan 2006 15:23:40 -0500 Received: from d03av02.boulder.ibm.com (d03av02.boulder.ibm.com [9.17.195.168]) by westrelay02.boulder.ibm.com (8.12.10/NCO/VERS6.8) with ESMTP id k0OKLtiD024062 for ; Tue, 24 Jan 2006 13:21:55 -0700 Received: from d03av02.boulder.ibm.com (loopback [127.0.0.1]) by d03av02.boulder.ibm.com (8.12.11/8.13.3) with ESMTP id k0OKNZQZ009882 for ; Tue, 24 Jan 2006 13:23:35 -0700 Content-Disposition: inline In-Reply-To: Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Chip Coldwell Cc: Gerhard Schneider , linux-scsi@vger.kernel.org On Tue, Jan 24, 2006 at 12:52:36PM -0500, Chip Coldwell wrote: > Put > > options st try_direct_io=0 > > in /etc/modprobe.conf. Direct I/O defeats read-ahead, and > significantly (factor of >5) degrates read performance. I don't know > about writes. For tape??? -- Patrick Mansfield