From owner-freebsd-hackers@FreeBSD.ORG Tue Nov 23 04:03:30 2004 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 50D8616A4CE; Tue, 23 Nov 2004 04:03:30 +0000 (GMT) Received: from ox.eicat.ca (ox.eicat.ca [66.96.30.35]) by mx1.FreeBSD.org (Postfix) with ESMTP id 140BB43D41; Tue, 23 Nov 2004 04:03:30 +0000 (GMT) (envelope-from dgilbert@daveg.ca) Received: by ox.eicat.ca (Postfix, from userid 66) id 9DC10CF18; Mon, 22 Nov 2004 23:03:29 -0500 (EST) Received: by canoe.dclg.ca (Postfix, from userid 101) id 8951667FC; Mon, 22 Nov 2004 23:03:25 -0500 (EST) From: David Gilbert MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Message-ID: <16802.46733.409188.353864@canoe.dclg.ca> Date: Mon, 22 Nov 2004 23:03:25 -0500 To: =?ISO-8859-1?Q?S=F8ren_Schmidt?= In-Reply-To: <41A251F5.9020601@DeepCore.dk> References: <16798.12075.465147.307112@canoe.dclg.ca> <864qjixdpi.wl%sf@FreeBSD.org> <41A1FB7D.9000308@jonny.eng.br> <41A2444E.2090609@jonny.eng.br> <16802.17819.983480.763628@canoe.dclg.ca> <41A251F5.9020601@DeepCore.dk> X-Mailer: VM 7.17 under 21.5 (beta17) "chayote" (+CVS-20040321) XEmacs Lucid cc: Charles Sprickman cc: freebsd-hackers@freebsd.org cc: =?ISO-8859-1?Q?Jo=E3o_Carlos_Mendes_Lu=EDs?= cc: FUJISHIMA Satsuki cc: Mike Geiger cc: David Gilbert Subject: Re: List of fake vs. real SATA drives. X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Nov 2004 04:03:30 -0000 >>>>> "S=F8ren" =3D=3D S=F8ren Schmidt writes: S=F8ren> David Gilbert wrote: >>>>>>> "Jo=E3o" =3D=3D Jo=E3o Carlos Mendes Lu=EDs writes: >>=20 >>=20 >> Jo=E3o> IIF they really have command queueing, I do believe. So, a >> Jo=E3o> bridged SATA drive will not have command queuing, right? >>=20 >> Well... from what I've read, the WD bridged drives do have queueing >> because they had an ATA-100 implementation of it. >>=20 >> Jo=E3o> Does FreeBSD already take advantage of this? How could I >> check Jo=E3o> if my SATA drivers have command queueing or not? >>=20 >> I'd like to know as well. S=F8ren> Currently the ATA driver does not support neither TCQ nor NCQ.= S=F8ren> For this to work at all both disk and controller needs to S=F8ren> support the mode in question. I've just gotten my hands on one= S=F8ren> of the new Promise controllers that supports NCQ, but I still S=F8ren> need disks to get it going. I do have a few Raptor's that S=F8ren> support the TCQ mode but initial testing shows little benefit S=F8ren> from it so it moved to the backburner... Do you need direct access to a drive or is access to a machine with a drive/controller in it sufficient. Are promise controllers the only ones to support NCQ so far? Promise doesn't always have the best reputation. We may be able to provide a test machine with remote access to a drive/controller combination. --=20 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D |David Gilbert, Independent Contractor. | Two things can only be = | |Mail: dave@daveg.ca | equal if and only if t= hey | |http://daveg.ca | are precisely opposit= e. | =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3DGLO=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D