From owner-freebsd-hackers Tue Aug 29 07:58:37 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.FreeBSD.org (8.6.11/8.6.6) id HAA07484 for hackers-outgoing; Tue, 29 Aug 1995 07:58:37 -0700 Received: from gndrsh.aac.dev.com (gndrsh.aac.dev.com [198.145.92.241]) by freefall.FreeBSD.org (8.6.11/8.6.6) with ESMTP id HAA07474 for ; Tue, 29 Aug 1995 07:58:34 -0700 Received: (from rgrimes@localhost) by gndrsh.aac.dev.com (8.6.11/8.6.9) id HAA03827; Tue, 29 Aug 1995 07:58:01 -0700 From: "Rodney W. Grimes" Message-Id: <199508291458.HAA03827@gndrsh.aac.dev.com> Subject: Re: S.O.S -2.1Stable and ASUSP54TP4 To: leo@lisa.rur.com (Leo Papandreou) Date: Tue, 29 Aug 1995 07:58:01 -0700 (PDT) Cc: jbryant@argus.iadfw.net, rashid@haven.ios.com, freebsd-hackers@freebsd.org In-Reply-To: from "Leo Papandreou" at Aug 28, 95 11:25:33 pm X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Length: 1730 Sender: hackers-owner@freebsd.org Precedence: bulk > > > > > > > Are you using non-parity memory? As you know, memory errors will not trap > > unless you are using parity memory. If you want to use FreeBSD for anything > > other than home-use, I strongly suggest parity memory. (Get a warrantee!) > > Actually, no triton based board traps parity errors. If you need what itsy- > bitsy comfort parity checks give you then you are going to have to sacrifice > performance and use a neptune based board. And to state my reason for agreement that parity is a ``itsy-bitsy comfort'', think about the fact that 80% of your memory access are going to a L2 cache that has never had parity on it, yet has a same FIT rate as the main memory system. Basically your more likely today to take a single bit error in your cache as you are in main memory :-(. > Personally I think parity memory is a poor investment; assuming I'm clear > on the techical details, once the P6 becomes a commodity item (real soon > now) the next motherboard you buy will want ECC memory, anyway. Its neat > the way this industry creates its own demand, eh? :-). Yes, but unfortanelty, ECC memory, though being supported by next generation chip sets, will be, IMHO, a rare thing in the PC market simply due to clone MB manufactures who will see it as an additional cost to them. > The upside to this is that financial institutions and similiar nervous > nellies will migrate their mission-critical servers to cost-effective > intel platforms whereupon demand for FreeBSD will go through the roof. > Now is the time to buy WC stock. > > :-) > -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Reliable computers for FreeBSD