From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rene Herman Subject: Re: Problems with IDE on linux 2.6.22.X Date: Thu, 30 Aug 2007 23:34:34 +0200 Message-ID: <46D737EA.6010707@gmail.com> References: <200708212149.12912.jopan@alumni.uv.es> <20070822162312.GG9412@csclub.uwaterloo.ca> <46CC6A2F.5000406@gmail.com> <200708280044.34475.jopan@alumni.uv.es> <46D455DB.8000800@gmail.com> <46D7231B.3080807@gmail.com> <87f94c370708301416j2a7c000bscbaef593af004010@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from smtpq1.tilbu1.nb.home.nl ([213.51.146.200]:37952 "EHLO smtpq1.tilbu1.nb.home.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754264AbXH3Vke (ORCPT ); Thu, 30 Aug 2007 17:40:34 -0400 In-Reply-To: <87f94c370708301416j2a7c000bscbaef593af004010@mail.gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Greg Freemyer Cc: Jan Engelhardt , =?ISO-8859-15?Q?Jos=E9_Lu?= =?ISO-8859-15?Q?is_Pati=F1o_Andr=E9s?= , Lennart Sorensen , Alan Cox , linux-kernel@vger.kernel.org, Jeff Garzik , linux-ide@vger.kernel.org On 08/30/2007 11:16 PM, Greg Freemyer wrote: > On 8/30/07, Rene Herman wrote: >> Well -- the world where ATA, SCSI, USB, Firewire and what have you are >> low-level drivers to a unifying storage layer is under non too obscure >> definitions sort of not non-wonderful... >> > > USB / Firewire / FC / iSCSI are all SCSI transports and fit within the > SCSI subsystem by design. > > ie. Just like ethernet, DSL, T-1, etc can all carry IP traffic with no > conceptual conflict, many media by design carry SCSI traffic. > > The PATA and SATA physical layer typically carry ATA commands and > having them tied into the SCSI stack is an aberration that I hope will > be eliminated some day. > > ATAPI is an exception. Not sure where that would end up in a perfect world. As said, if you make a bit of an effort to view the former SCSI stack as a unified storage midlayer the abberation becomes less abberational (if that's a word). Real SCSI, the other SCSI transports and ATAPI would just use more of the common mid-layer than P/SATA would. I'd expect the way forward would be to just refactor things until someone notices that drivers/scsi is the wrong place for sd.c and sr.c and moves them to drivers/block or whereever. Practically, the PATA driver gives me (almost) the same throughput as the old IDE driver does, and given that I need the former SCSI stack _anyway_ for my external USB harddrive, I don't see a pressing need to carry along yet another storage stack for my harddrive. Rene.