From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc MERLIN Subject: Re: Does Intel Sandy Bridge MB Sata support port multipliers? Date: Mon, 20 Jun 2011 07:25:44 -0700 Message-ID: <20110620142544.GC21438@merlins.org> References: <20110620045138.GB21438@merlins.org> <4DFF1642.4040404@seoss.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from magic.merlins.org ([209.81.13.136]:42703 "EHLO mail1.merlins.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754112Ab1FTOZs (ORCPT ); Mon, 20 Jun 2011 10:25:48 -0400 Content-Disposition: inline In-Reply-To: <4DFF1642.4040404@seoss.co.uk> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tim Small Cc: linux-ide@vger.kernel.org On Mon, Jun 20, 2011 at 10:43:30AM +0100, Tim Small wrote: > On 20/06/11 05:51, Marc MERLIN wrote: > > I upgraded the system and was hoping to use onboard sata (it's a Sandy > > Bridge lga1155). > > Which chipset? Perhaps lspci of the ahci controller device? 00:1f.2 SATA controller: Intel Corporation Unknown device 1c02 (rev 05) > > When I plug my PMP into that, the other drives are not detected. > > > > Where do I find the list of SATA drivers that support PMP. > > It's dependant on the hardware and the driver... > > https://ata.wiki.kernel.org/index.php/SATA_hardware_features Thanks, I tried searching for this page on google and came up empty handed. I guess this page needs a few more links, and maybe the whole wiki can be linked somewhere in /usr/src/linux/Documentation/ ? > > Are newer intel MBs with onboard SATA supposed to work? > > I believe Intel limit PMP support to certain chipsets and versions (for > "product differentiation" marketing reasons). I have an H67 motherboard > here, and PMP is supported on all 6 ports, but only in "CBS" mode (i.e. > poor performance if you try to access two drives concurrently). > > I'm currently wrestling with PMP support on Marvell AHCI devices.... > > It seems to work on an 88SE9125 with recent firmware, but not working > with an 88SE9123 with older firmware. I'm planning on doing further > debug later today. I see. > > ahci 0000:00:1f.2: flags: 64bit ncq sntf pm led clo pio slum part ems apst > > no "pmp" in that flag list :-( Ok, so I guess that answers this question. Thanks, Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/