From owner-freebsd-hardware Tue Dec 28 12:31:38 1999 Delivered-To: freebsd-hardware@freebsd.org Received: from mass.cdrom.com (mass.cdrom.com [204.216.28.184]) by hub.freebsd.org (Postfix) with ESMTP id 5041A15502 for ; Tue, 28 Dec 1999 12:31:32 -0800 (PST) (envelope-from msmith@mass.cdrom.com) Received: from mass.cdrom.com (localhost [127.0.0.1]) by mass.cdrom.com (8.9.3/8.9.3) with ESMTP id MAA01042 for ; Tue, 28 Dec 1999 12:36:01 -0800 (PST) (envelope-from msmith@mass.cdrom.com) Message-Id: <199912282036.MAA01042@mass.cdrom.com> X-Mailer: exmh version 2.1.1 10/15/1999 To: freebsd-hardware@FreeBSD.ORG Subject: Re: ECC RAM useless with FreeBSD? In-reply-to: Your message of "Tue, 28 Dec 1999 21:03:24 +0100." <199912282003.VAA26830@dorifer.heim3.tu-clausthal.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Date: Tue, 28 Dec 1999 12:36:01 -0800 From: Mike Smith Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > = > I had thought that ECC RAM would enable recognition of memory > failures (in addition to automatically fixing simple one-bit > errors). I thought that the chipset would cause a CPU trap or > something like that if an unrecoverable RAM error occurs, so > the OS could take some appropriate action (at least produce > a log message). Am I wrong? It seems to just fail silently, > possibly even continuing to use wrong data in calculations, > just as if there was only non-ECC RAM. We don't, at this point in time, do anything with unrecoverable ECC = errors to the best of my knowledge. > Is this a know problem, a bug, or do I just expect too much? I guess it counts as a "known problem", yes. If you haven't thrown your = flaky DIMM out, it would be _very_ useful to someone that actually wants = to try to develop and test this sort of code. If nobody contacts you = directly, could you send it to me? FTL will hold onto it until someone = has a use for it. -- = \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org \\ and he'll hate you for a lifetime. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message