From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Lord Subject: Re: New driver mtipx2xx submission Date: Tue, 03 May 2011 11:04:12 -0400 Message-ID: <4DC0196C.3040309@teksavvy.com> References: <22A973199D2C2F46933448F6E7990A300204F2BC@ntxboimbx31.micron.com> <20110428230605.78c55c70@lxorguk.ukuu.org.uk> <20110502195224.6175bfb0@lxorguk.ukuu.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from ironport2-out.teksavvy.com ([206.248.154.183]:28283 "EHLO ironport2-out.pppoe.ca" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751992Ab1ECPEO (ORCPT ); Tue, 3 May 2011 11:04:14 -0400 In-Reply-To: <20110502195224.6175bfb0@lxorguk.ukuu.org.uk> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Alan Cox Cc: Jeff Moyer , "Asai Thambi Samymuthu Pattrayasamy (asamymuthupa) [CONTRACTOR]" , linux-ide@vger.kernel.org On 11-05-02 02:52 PM, Alan Cox wrote: > > The queue depth and tag limits come from the SATA standard and also leak > fairly comprehensively into the AHCI spec so not unless the hardware has > extensions for it and is merely faked SATA (and if you are faking SATA > you have to wonder why if your goal is max performance) The reason to "fake" SATA and/or ATA is unchanged since the 1990s: so that the system BIOS can boot from the device, and the operating system can work up to the point where it finally loads hardware-specific drivers. Cheers