From owner-freebsd-current@FreeBSD.ORG Mon Jun 15 23:37:27 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3B47110656CC; Mon, 15 Jun 2009 23:37:27 +0000 (UTC) (envelope-from dillon@apollo.backplane.com) Received: from apollo.backplane.com (apollo.backplane.com [216.240.41.2]) by mx1.freebsd.org (Postfix) with ESMTP id 0FE788FC0A; Mon, 15 Jun 2009 23:37:26 +0000 (UTC) (envelope-from dillon@apollo.backplane.com) Received: from apollo.backplane.com (localhost [127.0.0.1]) by apollo.backplane.com (8.14.2/8.14.1) with ESMTP id n5FNbQrk008015; Mon, 15 Jun 2009 16:37:26 -0700 (PDT) Received: (from dillon@localhost) by apollo.backplane.com (8.14.2/8.13.4/Submit) id n5FNbQrI008014; Mon, 15 Jun 2009 16:37:26 -0700 (PDT) Date: Mon, 15 Jun 2009 16:37:26 -0700 (PDT) From: Matthew Dillon Message-Id: <200906152337.n5FNbQrI008014@apollo.backplane.com> To: Phil Oleson References: <4A254B45.8050800@mavhome.dp.ua> <4A294DC3.5010008@mavhome.dp.ua> <200906051728.n55HSFf0076644@apollo.backplane.com> <200906152352.48231.Daan@vehosting.nl> <200906152209.n5FM9psY007070@apollo.backplane.com> <4A36CEE9.9040101@nixil.net> Cc: Daan Vreeken , Alexander Motin , FreeBSD-Current , freebsd-arch@freebsd.org Subject: Re: WIP: ATA to CAM integration X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Jun 2009 23:37:27 -0000 :meh.. found this via google: : :http://www.tomshardware.com/reviews/storage-accessories,1787-2.html : :The article claims it's AHCI compliant.. though the addonics web page :doesn't specifically says so from a cursory glance here: : :http://www.addonics.com/products/host_controller/extpm.asp : :and the other form factors. :http://www.addonics.com/products/pm/ : : -Phil. I think they mis-spoke. They are SATA-compliant and Port Multiplier compliant, and they use FIS-based packets, so they pretty much do away with all the ATA baggage, but they don't use the AHCI device interface so they won't probe as an AHCI driver. I can see why they do it that way, though. It looks like they hide most of the complexity behind the chipset, which is nice. AHCI exposes a lot of that complexity. It looks like a reasonable chipset. -Matt Matthew Dillon