From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755179AbXGDPoT (ORCPT ); Wed, 4 Jul 2007 11:44:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751500AbXGDPoM (ORCPT ); Wed, 4 Jul 2007 11:44:12 -0400 Received: from noname.neutralserver.com ([70.84.186.210]:23517 "EHLO noname.neutralserver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751347AbXGDPoL (ORCPT ); Wed, 4 Jul 2007 11:44:11 -0400 Date: Wed, 4 Jul 2007 18:44:05 +0300 From: Dan Aloni To: Michael Tokarev Cc: Kernel Mailing List , linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org Subject: Re: Some NCQ numbers... Message-ID: <20070704154405.GA27166@localdomain> References: <468392CE.6010206@msgid.tls.msk.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <468392CE.6010206@msgid.tls.msk.ru> User-Agent: Mutt/1.5.13 (2006-08-11) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - noname.neutralserver.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [0 0] / [47 12] X-AntiAbuse: Sender Address Domain - monatomic.org X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 28, 2007 at 02:51:58PM +0400, Michael Tokarev wrote: >[..] > Test machine was using MPTSAS driver for the following card: > SCSI storage controller: LSI Logic / Symbios Logic SAS1064E PCI-Express Fusion-MPT SAS (rev 02) > > Pretty similar results were obtained on an AHCI controller: > SATA controller: Intel Corporation 82801GR/GH (ICH7 Family) Serial ATA Storage Controller AHCI (rev 01) > on another machines. Are you sure that NCQ was enabled between the controller and drive? Did you verify this? I know about some versions that disable NCQ support internally in their firmware (something to do with bugs in error handling). -- Dan Aloni XIV LTD, http://www.xivstorage.com da-x (at) monatomic.org, dan (at) xiv.co.il