From owner-freebsd-stable Sun Jun 28 23:12:23 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id XAA13905 for freebsd-stable-outgoing; Sun, 28 Jun 1998 23:12:23 -0700 (PDT) (envelope-from owner-freebsd-stable@FreeBSD.ORG) Received: from gatekeeper.alcatel.com.au (gatekeeper.alcatel.com.au [203.17.66.1]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id XAA13896 for ; Sun, 28 Jun 1998 23:12:18 -0700 (PDT) (envelope-from peter.jeremy@alcatel.com.au) Received: from mfg1.cim.alcatel.com.au ("port 2893"@[139.188.23.1]) by gatekeeper.alcatel.com.au (PMDF V5.1-7 #U2695) with ESMTP id <01IYT7Q11C0G004OTJ@gatekeeper.alcatel.com.au> for freebsd-stable@FreeBSD.ORG; Mon, 29 Jun 1998 14:02:16 +1000 Received: from gsms01.alcatel.com.au by cim.alcatel.com.au (PMDF V5.1-10 #23324) with ESMTP id <01IYT7PL7T0GCWIH03@cim.alcatel.com.au> for freebsd-stable@FreeBSD.ORG; Mon, 29 Jun 1998 14:01:56 +1000 Received: (from jeremyp@localhost) by gsms01.alcatel.com.au (8.8.8/8.7.3) id OAA02134 for freebsd-stable@FreeBSD.ORG; Mon, 29 Jun 1998 14:01:52 +1000 (EST) Date: Mon, 29 Jun 1998 14:01:52 +1000 (EST) From: Peter Jeremy Subject: Re: determining ecc errors on freebsd-stable To: freebsd-stable@FreeBSD.ORG Message-id: <199806290401.OAA02134@gsms01.alcatel.com.au> Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sun, 28 Jun 1998 19:57:26 -0700 (PDT), Tom wrote: > Basically, if a fixable error occurs, you won't know about it. If an >unfixable error occurs, you'll know real fast. Which substantially reduces the usefulness of ECC. It may increase the MTBF (since a single-bit failure is now hidden), but it no longer provides fault tolerance since you can't detect a memory module that is getting flaky (or has a hard error). Yet another design engineer for the firing squad... Peter -- Peter Jeremy (VK2PJ) peter.jeremy@alcatel.com.au Alcatel Australia Limited 41 Mandible St Phone: +61 2 9690 5019 ALEXANDRIA NSW 2015 Fax: +61 2 9690 5247 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message