From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: libata driver update posted Date: Sat, 19 Jul 2003 16:13:05 -0400 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <3F19A651.2080503@pobox.com> References: <3F1711C8.6040207@pobox.com> <3F17F28C.9050105@pobox.com> <1058542771.13515.1599.camel@workshop.saharacpt.lan> <20030718154322.GB27152@gtf.org> <1058645294.23174.7.camel@nosferatu.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:39613 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S270502AbTGST6S (ORCPT ); Sat, 19 Jul 2003 15:58:18 -0400 In-Reply-To: <1058645294.23174.7.camel@nosferatu.lan> List-Id: linux-scsi@vger.kernel.org To: azarah@gentoo.org Cc: Catalin BOIE , Linux Kernel Mailing List , SCSI Mailing List , Vojtech Pavlik Martin Schlemmer wrote: > On Fri, 2003-07-18 at 17:43, Jeff Garzik wrote: > > Slower this side. The Maxtor 40GB (ata133) is however just set to > udma33, where the Seagate 20GB (ata100) driver is set correctly to > udma100. Yeah, that's expected: Parallel ATA (PATA) requires cable detection to go beyond UDMA/33, and my driver doesn't do that yet [since I'm concentrating on SATA]. > The Seagate start off ok (about 35mb/s), but then after doing some heavy > disk io, it also just drops to the 20mb/s region. That's definitely interesting. Is "heavy disk I/O" the hdparm stuff you described, or something else too? Jeff