From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 9312 invoked from network); 6 Jul 2020 17:24:35 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 6 Jul 2020 17:24:35 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 4C3AF9C759; Tue, 7 Jul 2020 03:24:30 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 02CD294598; Tue, 7 Jul 2020 03:23:31 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 3093C94598; Tue, 7 Jul 2020 03:23:29 +1000 (AEST) X-Greylist: delayed 1915 seconds by postgrey-1.36 at minnie.tuhs.org; Tue, 07 Jul 2020 03:23:28 AEST Received: from elf.torek.net (unknown [96.78.171.221]) by minnie.tuhs.org (Postfix) with ESMTPS id C2E6694588 for ; Tue, 7 Jul 2020 03:23:28 +1000 (AEST) Received: from elf.torek.net (localhost [127.0.0.1]) by elf.torek.net (8.15.2/8.15.2) with ESMTP id 066GpW9s048139 for ; Mon, 6 Jul 2020 09:51:32 -0700 (PDT) (envelope-from torek@torek.net) Message-Id: <202007061651.066GpW9s048139@elf.torek.net> From: Chris Torek To: The Eunuchs Hysterical Society In-reply-to: Your message of "Sat, 04 Jul 2020 17:16:09 -0700." <20200705001609.GO29318@mcvoy.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <48137.1594054287.1@elf.torek.net> Date: Mon, 06 Jul 2020 09:51:27 -0700 X-Greylist: inspected by milter-greylist-4.6.2 (elf.torek.net [127.0.0.1]); Mon, 06 Jul 2020 09:51:32 -0700 (PDT) for IP:'127.0.0.1' DOMAIN:'localhost' HELO:'elf.torek.net' FROM:'torek@torek.net' RCPT:'' X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (elf.torek.net [127.0.0.1]); Mon, 06 Jul 2020 09:51:32 -0700 (PDT) Subject: Re: [TUHS] VFS prior to 1984 X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" >On Sun, Jul 05, 2020 at 10:05:57AM +1000, Dave Horsfall wrote: >We found a bunch of those because computers used to be ECC or parity and >then 15 years ago or so, they just dumped the parity bit so single bit >errors go unreported (noice, computer industry). To be fair, there are still some ECC systems. Unfortunately most of the home-use Intel boxes aren't. My own home-use box isn't and (now 6+ years ago) I had bad RAM in it that produced single-bit errors in an inode block that led to panics that led to me finding the single-bit errors, but I don't know if there are some damaged files. I keep thinking I'll replace it with a new box that does have ECC, but haven't gotten around to it yet. I see some consumer-priced AMD CPUs have at least theoretical ECC support but I haven't found anything that says the ECC actually works, and have seen a few articles that hint that it doesn't. iX sells NAS boxes that do have ECC, though. Chris