From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Hancock Subject: Re: SATA II NCQ and multi-port support for ICH7 Date: Wed, 22 Jul 2009 12:04:02 -0600 Message-ID: <4A675492.9060106@gmail.com> References: <0KN6003ZATOVGH70@vms173017.mailsrvcs.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-ew0-f226.google.com ([209.85.219.226]:43045 "EHLO mail-ew0-f226.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751476AbZGVSB5 (ORCPT ); Wed, 22 Jul 2009 14:01:57 -0400 Received: by ewy26 with SMTP id 26so418551ewy.37 for ; Wed, 22 Jul 2009 11:01:56 -0700 (PDT) In-Reply-To: <0KN6003ZATOVGH70@vms173017.mailsrvcs.net> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: dhdurgee@verizon.net Cc: Jeff Garzik , linux-ide@vger.kernel.org On 07/22/2009 07:15 AM, dhdurgee@verizon.net wrote: > I have recently purchased an Areca ARC-5020 external eSATA II RAID to > connect to my system. This unit supports ICH NCQ and multi-port for > multiple volumes. I have connected it to my Intel DG41TY mainboard, which > has the Intel 82801GB I/O Controller Hub (ICH7), but I find I am only > seeing the first volume and the unit shows NCQ is inactive. ... > So NCQ is detected on the RAID unit but is not enabled and only one of the > two volumes is being seen. Am I missing something that needs to be > enabled for the driver to support the advanced features? Is my > configuration loading the proper driver? If not, how can I load it? The SATA controller is in the legacy PIIX mode which doesn't support most SATA-specific features. You need to switch it into AHCI mode (should be a BIOS setting for it somewhere) and then the ahci driver will get used instead of ata_piix.