From owner-freebsd-current@FreeBSD.ORG Mon Dec 14 11:20:22 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 9970910656A7; Mon, 14 Dec 2009 11:20:22 +0000 (UTC) (envelope-from des@des.no) Received: from tim.des.no (tim.des.no [194.63.250.121]) by mx1.freebsd.org (Postfix) with ESMTP id 5ACE38FC25; Mon, 14 Dec 2009 11:20:22 +0000 (UTC) Received: from ds4.des.no (des.no [84.49.246.2]) by smtp.des.no (Postfix) with ESMTP id 555BB6D450; Mon, 14 Dec 2009 11:20:21 +0000 (UTC) Received: by ds4.des.no (Postfix, from userid 1001) id 32C9A844F3; Mon, 14 Dec 2009 12:20:21 +0100 (CET) From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= To: "K.R." References: <4B241509.8060906@FreeBSD.org> <4B25A28A.1040305@FreeBSD.org> <4B25D425.4000308@haruhiism.net> Date: Mon, 14 Dec 2009 12:20:21 +0100 In-Reply-To: <4B25D425.4000308@haruhiism.net> (K. R.'s message of "Mon, 14 Dec 2009 08:59:01 +0300") Message-ID: <86pr6hn6oa.fsf@ds4.des.no> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.95 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Cc: Doug Barton , Ivan Voras , freebsd-current@freebsd.org Subject: Re: AHCI/ATA_CAM for dummies? 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, 14 Dec 2009 11:20:22 -0000 "K.R." writes: > From what I know, SATA 1 does not support NCQ. It's a feature of SATA > 2. a) There is no such thing as SATA 1 or 2; there is only SATA, although marketroids sometimes incorrectly refer to drives that support 3 Gbps transfer speed as SATA II drives. b) SATA has supported NCQ from the very beginning. In fact, command queueing already existed in PATA at the time SATA was finalized. DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no