From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756602AbXGDQRr (ORCPT ); Wed, 4 Jul 2007 12:17:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753550AbXGDQRj (ORCPT ); Wed, 4 Jul 2007 12:17:39 -0400 Received: from hobbit.corpit.ru ([81.13.94.6]:22316 "EHLO hobbit.corpit.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752370AbXGDQRh (ORCPT ); Wed, 4 Jul 2007 12:17:37 -0400 Message-ID: <468BC81F.7090102@msgid.tls.msk.ru> Date: Wed, 04 Jul 2007 20:17:35 +0400 From: Michael Tokarev User-Agent: Icedove 1.5.0.10 (X11/20070307) MIME-Version: 1.0 To: Dan Aloni CC: Kernel Mailing List , linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org Subject: Re: Some NCQ numbers... References: <468392CE.6010206@msgid.tls.msk.ru> <20070704154405.GA27166@localdomain> In-Reply-To: <20070704154405.GA27166@localdomain> X-Enigmail-Version: 0.94.2.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Dan Aloni wrote: > 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). The next obvious question is: how to check/verify this? /mjt