From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bastiaan Jacques Subject: Re: Seagate SATA 3GB/s drive connected to via vt8251 using ahci module Date: Tue, 20 Jun 2006 21:31:12 +0200 Message-ID: <200606202131.12654.b.jacques@planet.nl> References: <1149787827.4180.8.camel@anja> <200606201721.26291.boac@wanadoo.nl> <4498163C.90601@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 7BIT Return-path: Received: from smtp16.wxs.nl ([195.121.247.7]:64473 "EHLO smtp16.wxs.nl") by vger.kernel.org with ESMTP id S1750799AbWFTTax (ORCPT ); Tue, 20 Jun 2006 15:30:53 -0400 Received: from elysium.bjacques.org (ip56538861.direct-adsl.nl [86.83.136.97]) by smtp16.wxs.nl (iPlanet Messaging Server 5.2 Patch 2 (built Jul 14 2004)) with ESMTP id <0J1600EMMBJGPT@smtp16.wxs.nl> for linux-ide@vger.kernel.org; Tue, 20 Jun 2006 21:30:52 +0200 (CEST) In-reply-to: <4498163C.90601@gmail.com> Content-disposition: inline Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo Cc: boac@wanadoo.nl, linux-ide@vger.kernel.org On Tuesday 20 June 2006 17:37, Tejun Heo wrote: > [CC'ing Bastiaan Jacques. Hi!] Hey! > Do you happen to have a different drive which can do NCQ? > Preferably, one from another vendor? I've just tried it with a Maxtor drive supporting NCQ, and it didn't work. > AFAICS, the ahci driver is > doing NCQ as the AHCI spec specifies and all ICH controllers seem to > be quite happy with it. I wanna know whether the problem is from the > specific combination of the controller and the drive or the via > controller needs a different programming sequence for NCQ in general. It would seem the problem is in the VIA controller. Surprise, surprise. > Bastiaan, do you know whether we need to do things differently to use > NCQ on vt8251? Apparently we have a hardware or firmware bug to work around, but I have no idea what we should be doing differently. -- Bastiaan