From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: Fwd: confusion about libata.force=80c Date: Sun, 16 Nov 2008 18:45:43 +0900 Message-ID: <491FEBC7.4090608@kernel.org> References: <57947bf80805141120v615ef957g323114637d171f0a@mail.gmail.com> <57947bf80805200222j19efa2d2n7ff89fe026745ba1@mail.gmail.com> <4833B9B5.7060601@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from hera.kernel.org ([140.211.167.34]:52427 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754006AbYKPJpb (ORCPT ); Sun, 16 Nov 2008 04:45:31 -0500 In-Reply-To: Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tomas Kindl Cc: linux-ide@vger.kernel.org Tomas Kindl wrote: > Tejun Heo gmail.com> writes: > >>> Is force=80c what I want? Should it work? >> It should but is overridden by device side cable detection upto 2.6.25. >> 2.6.26 will have it fixed. force=udma66 should work. >> > > Hi, I get same error (Unknown boot option `libata.force=3:1.5': ignoring > ) although I am trying it on 2.6.27.4 (MDV flavor - but still). That's not a kernel problem but how module parameters are passed to modules loaded from initrd and is distro specific. Please note that kernel will spit the message even when the module parameter is later picked up by initrd. So, please ping MDV for instructions on how to pass kernel parameter via initrd. -- tejun