From owner-freebsd-stable@FreeBSD.ORG Thu Mar 25 01:48:51 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 776A3106564A for ; Thu, 25 Mar 2010 01:48:51 +0000 (UTC) (envelope-from fullermd@over-yonder.net) Received: from thyme.infocus-llc.com (server.infocus-llc.com [206.156.254.44]) by mx1.freebsd.org (Postfix) with ESMTP id 4AED28FC15 for ; Thu, 25 Mar 2010 01:48:50 +0000 (UTC) Received: from draco.over-yonder.net (c-75-64-226-141.hsd1.ms.comcast.net [75.64.226.141]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by thyme.infocus-llc.com (Postfix) with ESMTPSA id 99EAE37B43C; Wed, 24 Mar 2010 20:48:49 -0500 (CDT) Received: by draco.over-yonder.net (Postfix, from userid 100) id A9F8B61C41; Wed, 24 Mar 2010 20:48:48 -0500 (CDT) Date: Wed, 24 Mar 2010 20:48:48 -0500 From: "Matthew D. Fuller" To: John Long Message-ID: <20100325014848.GW62031@over-yonder.net> References: <5.2.1.1.2.20100324100236.0320fec8@mail.sstec.com> <5.2.1.1.2.20100322150534.032bee30@mail.sstec.com> <5.2.1.1.2.20100322150534.032bee30@mail.sstec.com> <5.2.1.1.2.20100324100236.0320fec8@mail.sstec.com> <5.2.1.1.2.20100324165115.03159ab8@mail.sstec.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5.2.1.1.2.20100324165115.03159ab8@mail.sstec.com> X-Editor: vi X-OS: FreeBSD User-Agent: Mutt/1.5.20-fullermd.4 (2009-06-14) X-Virus-Scanned: clamav-milter 0.95.3 at thyme.infocus-llc.com X-Virus-Status: Clean Cc: freebsd-stable@freebsd.org, Jeremy Chadwick Subject: Re: Powerd and est / eist functionality X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Mar 2010 01:48:51 -0000 On Wed, Mar 24, 2010 at 06:04:51PM -0700 I heard the voice of John Long, and lo! it spake thus: > >> The i3/i5/i7 chips don't appear to offer ECC framework on their >> memory controllers (which are now on-die as I'm sure you know), >> which is why I plan to stay away from them for servers. > > I agree with your thoughts however I believe one can still use the > I-series in a p55 board and get the ECC working Not the case. To use ECC, the memory controller has to support it. Nehalem moved the memory controller on-die, and on the non-Xeons, it doesn't have ECC capability. You'd have to go Xeon, use prior chips (with the memory controller on the motherboard) with careful motherboard selection, or use AMD (where all the chips have ECC in the IMC, though you still need a little care to be sure your motherboard doesn't sabotage it). -- Matthew Fuller (MF4839) | fullermd@over-yonder.net Systems/Network Administrator | http://www.over-yonder.net/~fullermd/ On the Internet, nobody can hear you scream.