Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1423875AbWKIPRE (ORCPT ); Thu, 9 Nov 2006 10:17:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1423986AbWKIPRD (ORCPT ); Thu, 9 Nov 2006 10:17:03 -0500 Received: from wx-out-0506.google.com ([66.249.82.226]:17308 "EHLO wx-out-0506.google.com") by vger.kernel.org with ESMTP id S1423875AbWKIPRB (ORCPT ); Thu, 9 Nov 2006 10:17:01 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=iCz2riE60PPa7ZKamlT7K5t+i29p/OGzx1xNEokknnNem7jFN3+AI7hHZ8+VRAfJ1qiZQ45cnSVF4EqImRLoRpogJJokUg/Hhrt6+9iMQFK2r0NNYm+TqjnORLSDb3fXkzwEOBCdLUnMRuPXxc8PfO66gkG+Mij0zWU1HGmeYMc= Message-ID: <5a4c581d0611090717y7d1fdf98t2f1a84b7c5e4d6f2@mail.gmail.com> Date: Thu, 9 Nov 2006 15:17:00 +0000 From: "Alessandro Suardi" To: Stephen.Clark@seclark.us Subject: Re: Abysmal PATA IDE performance Cc: "Arjan van de Ven" , "=?ISO-8859-1?Q?\"\\\"J.A.\\\"_Magall=F3n\"?=" , "=?ISO-8859-1?Q?Bj=F6rn_Steinbrink?=" , "Mark Lord" , linux-kernel , alan@lxorguk.ukuu.org.uk In-Reply-To: <45533DB9.4000405@seclark.us> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <455206E7.2050104@seclark.us> <45526D50.5020105@rtr.ca> <455277E1.3040803@seclark.us> <20061109020758.GA21537@atjola.homenet> <4552A638.4010207@seclark.us> <20061109094014.1c8b6bed@werewolf-wl> <1163062700.3138.467.camel@laptopd505.fenrus.org> <45533DB9.4000405@seclark.us> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1769 Lines: 57 On 11/9/06, Stephen Clark wrote: > Arjan van de Ven wrote: > > >>Probably your drives are renamed. > >>Before you had (wild guess, look at your boot log messages): > >>- ata bus -> hdc,hdd > >>- sata -> sda (if you really have any sata bus...) > >> > >>Now all hdX become sdX, and PATA is detected _before_ SATA, so you names > >>probaly became: > >>- ata via libata -> sda (HD), sr0 (CDROM) > >>- sata -> sdb. > >> > >> > > > >on fedora this doesn't matter (due to mount-by-label) > > > >the bigger problem I suspect is that the sata modules aren't part of the > >initrd! > > > >you can force the issue by adding > > > >alias scsi_hostadapter1 ata_piix > > > >to the /etc/modprobe.conf file, and then recreating the initrd > >(see the mkinitrd tool, or just install the kernel rpm) > > > > > > > > > > > > > Thanks all. > > Arjan, using combined_mode=libata and making a new ramdisk increased my > xfer rate from 1.xx mb/sec to 28.xx mb/sec. > > I am curious as to why my friends dell inspiron 8200 with a 1.8ghz p4 > and the same drive using the same drive with FC6 and the standard ide > module gets 44 to 45 mb/sec. The figures are so similar to the problem I recently posted that you might want to give a shot at unloading ehci_hcd module, then try again getting performance numbers from the IDE disk. In my case unloading ehci_hcd boosts IDE performance from 20 to 40MB/s (but of course kills USB2 disk performance). --alessandro "...when I get it, I _get_ it" (Lara Eidemiller) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/