From owner-freebsd-hackers Wed Mar 4 13:00:14 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id NAA25620 for freebsd-hackers-outgoing; Wed, 4 Mar 1998 13:00:14 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from sendero.simon-shapiro.org (sendero-fxp0.Simon-Shapiro.ORG [206.190.148.34]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id MAA25469 for ; Wed, 4 Mar 1998 12:59:54 -0800 (PST) (envelope-from shimon@sendero-fxp0.simon-shapiro.org) Received: (qmail 10549 invoked by uid 1000); 4 Mar 1998 21:06:43 -0000 Message-ID: X-Mailer: XFMail 1.3-alpha-021598 [p0] on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: <199803041914.UAA01584@yedi.iaf.nl> Date: Wed, 04 Mar 1998 13:06:43 -0800 (PST) Reply-To: shimon@simon-shapiro.org Organization: The Simon Shapiro Foundation From: Simon Shapiro To: Wilko Bulte Subject: Re: SCSI Bus redundancy... Cc: hackers@FreeBSD.ORG, blkirk@float.eli.net, jdn@acp.qiv.com, tlambert@primenet.com, sbabkin@dcn.att.com, grog@lemis.com Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On 04-Mar-98 Wilko Bulte wrote: .... > And best of all: no users.. We all know that systems tend to stay up much > longer when left alone (read: dedicated to say WWW serving or something > like that). sure. The number of variants is much smaller then, the number of execution paths through the code is smaller. It is almost as if software behaves like mechanics (like an engine running at constant RPM lasts much longer than one stat stops-n-goes, etc.). Some computer scientist needs to pick up on this phenomenon (really). >> No, I use FreeBSD for the last 18 months. Seagate claims, in writing >> 1,000,000 hours mean time between failures on their drives. Can FreeBSD > > Read the fine print on MTBF: it applies to large enough populations. You > as Joe Average user will never have a statistically sound sample to claim > anything. So they can essentially write down what they like. Oh, I am fully aware of it. But I still claim (with confidence), that the typical modern hard disk has a much better (many times better) uptime than any Unix (or NT) does, I suspect they even have better uptime than most motherboards and most memory SIMMs (although this makes no sense at all). Simon To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message