Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758725Ab0APDDF (ORCPT ); Fri, 15 Jan 2010 22:03:05 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758199Ab0APDDD (ORCPT ); Fri, 15 Jan 2010 22:03:03 -0500 Received: from out2.smtp.messagingengine.com ([66.111.4.26]:55659 "EHLO out2.smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752938Ab0APDDB (ORCPT ); Fri, 15 Jan 2010 22:03:01 -0500 X-Sasl-enc: IKtD3W9LSxEo9kmfMz2KL+LPp0pyxFzT016DXdPKbNpD 1263610980 Date: Sat, 16 Jan 2010 01:02:57 -0200 From: Henrique de Moraes Holschuh To: Robert Hancock Cc: Jeff Garzik , Seth Heasley , linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2.6.32.3] ahci: AHCI and RAID mode SATA patch for Intel Cougar Point DeviceIDs Message-ID: <20100116030257.GG3814@khazad-dum.debian.net> References: <201001121700.18234.seth.heasley@intel.com> <4B4D4EAA.2010109@gmail.com> <4B4DAA68.60608@pobox.com> <51f3faa71001131611y343ad225n1acc73900fd49894@mail.gmail.com> <51f3faa71001131642u2cc9de80n8e73be7a8707afb2@mail.gmail.com> <20100114201136.GA3814@khazad-dum.debian.net> <51f3faa71001141615k3223a02fhb0b882b6cbe680cf@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <51f3faa71001141615k3223a02fhb0b882b6cbe680cf@mail.gmail.com> X-GPG-Fingerprint: 1024D/1CDB0FE3 5422 5C61 F6B7 06FB 7E04 3738 EE25 DE3F 1CDB 0FE3 User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 14 Jan 2010, Robert Hancock wrote: > > Maybe it is the silicon AHCI in ICH6R that is immature, and one is much > > better of using it in IDE mode? > > That seems unlikely, since the Intel-provided Matrix Storage drivers > for that controller on Windows will be using AHCI mode.. That doesn't say much. If the change doesn't risk switching unaware users from IDE mode to AHCI, it is not a problem. But if it does, why risk it? It is not like anyone that wants hotplug and has an ICH6-R/M system won't have figured it out by now how to get it to use AHCI, these are NOT new systems. AHCI in ICH6R or ICH6M is not always an advantage. You don't want it on ICH6-M in a laptop if it is not going to use the hotplug, for example. In AHCI mode, the chip draws more power. -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/