From owner-freebsd-hackers Fri Apr 7 6:36:54 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from relay02.chello.nl (relay02.chello.nl [212.83.68.146]) by hub.freebsd.org (Postfix) with ESMTP id EA6C437BC46 for ; Fri, 7 Apr 2000 06:36:51 -0700 (PDT) (envelope-from wkb@chello.nl) Received: from chello.nl ([213.46.78.184]) by relay02.chello.nl (InterMail vK.4.02.00.00 201-232-116 license 99c8f334c649856e3f2cdadc4054e412) with ESMTP id <20000407133626.SET23338.relay02@chello.nl>; Fri, 7 Apr 2000 15:36:26 +0200 Received: (from wkb@localhost) by chello.nl (8.9.3/8.9.3) id PAA07594; Fri, 7 Apr 2000 15:36:46 +0200 (CEST) (envelope-from wkb) Date: Fri, 7 Apr 2000 15:36:46 +0200 From: Wilko Bulte To: "Koster, K.J." Cc: "'Bob.Gorichanaz@midata.com'" , "'FreeBSD Hackers mailing list'" Subject: Re: bad memory patch? Message-ID: <20000407153646.A7558@yedi.wbnet> Reply-To: wc.bulte@chello.nl References: <59063B5B4D98D311BC0D0001FA7E452201313A80@l04.research.kpn.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0.1i In-Reply-To: <59063B5B4D98D311BC0D0001FA7E452201313A80@l04.research.kpn.com>; from K.J.Koster@kpn.com on Fri, Apr 07, 2000 at 03:31:07PM +0100 X-OS: FreeBSD 3.4-STABLE X-PGP: finger wilko@freebsd.org Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, Apr 07, 2000 at 03:31:07PM +0100, Koster, K.J. wrote: > > > > Not trying to push this idea one way or the other, I'm just > > curious as to WHY so many people think this is a "bad idea" > > > I can think of four things real quick: > > 1) Disks are much slowere, and controllers actually have time to do proper > error detection. Memory is built for raw, blind speed. The analogy that > memory is a disk does not hold for long. > > 2) Testing memory is a nightmare. It's virtually impossible to test your RAM > and guarantee it is right. If the memory test tells you your RAM is broken, > you have to replace it. If it tells you your RAM is fine, it may or may not > be fine. Much like a pregnancy test. :-) Thus, expecting the OS to find and > mark bad memory for you will give you a false sense of security. And Real Systems [tm] use ECC memory. ;-) -- Wilko Bulte Powered by FreeBSD http://www.freebsd.org http://www.tcja.nl To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message