From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stan Hoeppner Subject: Re: kernel 2.6.31.1 + Sil 3512 + WDC WD5000AAKS-00V1A0 = no NCQ and UDMA5 instead of UDMA6 Date: Thu, 17 Dec 2009 20:22:49 -0600 Message-ID: <4B2AE779.9060109@hardwarefreak.com> References: <4B2A3D25.9030209@hardwarefreak.com> <4B2A720B.2040809@pobox.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mo-65-41-216-221.sta.embarqhsd.net ([65.41.216.221]:60355 "EHLO greer.hardwarefreak.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752934AbZLRCWu (ORCPT ); Thu, 17 Dec 2009 21:22:50 -0500 In-Reply-To: <4B2A720B.2040809@pobox.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Jeff Garzik Cc: linux-ide@vger.kernel.org Jeff Garzik put forth on 12/17/2009 12:01 PM: > On 12/17/2009 09:16 AM, Stan Hoeppner wrote: >> Hi Jeff, >> >> I recently added a Silicon Image 3512 based PCI card to an old Intel >> 440BX machine along with a single platter 500GB WD SATA2 drive. I'd >> have gone with an ahci sata2 controller but couldn't find one in 33MHz >> PCI. I compiled a new kernel, adding SCSI disk, libata and sata_sil >> support using make menuconfig and kernel.org sources installed the >> debian way on lenny 5.0.3. I left the old piix diver in so I could >> still boot from the old IDE disk and move the entire Linux system over. >> That all went pretty smoothly, I'm now booting from the new disk, and >> the sata subsystem is working pretty well, especially compared to the >> old 40GB Maxtor IDE disk (now removed from the system). > > sata_sil hardware does not support NCQ. > > Jeff Dangit, I thought the 3512 was one of the SiI chips that did support it. My mistake. Is there anything else I can tweak to get more of this drive's performance or am I stuck with what I have? My read of your default UDMA/100 comments is that it's a safety net type setting for the 3112. Would bumping this to UDMA/133 give me any improvement over the PCI bus? Is there anything else I could tweak? Thanks Jeff. -- Stan