From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alan Cox Subject: Re: ICH7: ata_piix twice as fast as ahci? Date: Sun, 17 Feb 2008 17:20:45 +0000 Message-ID: <20080217172045.050afd14@core> References: <6b9952490802170741h1de9be53nefccea3775f7de00@mail.gmail.com> <20080217161033.3bb420fd@core> <6b9952490802170839m4456353ejfd5a68d0aaccdf88@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:58931 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751708AbYBQR3F (ORCPT ); Sun, 17 Feb 2008 12:29:05 -0500 In-Reply-To: <6b9952490802170839m4456353ejfd5a68d0aaccdf88@mail.gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Joris Cc: Linux IDE > Am I interpreting this correctly as having to choose between fast iops > with low cpu (+ hotplug) with ahci and twice the linear read speed > with ata_piix? Some drives do weird things when NCQ is used and turn off some of their caching in that case so it depends on the drive what happens to linear speed. Alan