From owner-freebsd-hackers Thu Mar 5 11:00:19 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id LAA28791 for freebsd-hackers-outgoing; Thu, 5 Mar 1998 11:00:19 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from Kitten.mcs.com (Kitten.mcs.com [192.160.127.90]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id KAA28682 for ; Thu, 5 Mar 1998 10:59:11 -0800 (PST) (envelope-from karl@Mars.mcs.net) Received: from Mars.mcs.net (karl@Mars.mcs.net [192.160.127.85]) by Kitten.mcs.com (8.8.7/8.8.2) with ESMTP id MAA10948; Thu, 5 Mar 1998 12:59:11 -0600 (CST) Received: (from karl@localhost) by Mars.mcs.net (8.8.7/8.8.2) id MAA22575; Thu, 5 Mar 1998 12:59:11 -0600 (CST) Message-ID: <19980305125911.15755@mcs.net> Date: Thu, 5 Mar 1998 12:59:11 -0600 From: Karl Denninger To: Niall Smart Cc: hackers@FreeBSD.ORG Subject: Re: SCSI Bus redundancy... References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.84 In-Reply-To: ; from Niall Smart on Thu, Mar 05, 1998 at 06:56:00PM +0000 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Thu, Mar 05, 1998 at 06:56:00PM +0000, Niall Smart wrote: > On Mar 5, 12:09pm, Karl Denninger wrote: > } Subject: Re: SCSI Bus redundancy... > > > > 1) The devices on the RAID arrays are high-availability required machines > > (ie: primary NFS fileservers, News service, and the authentication > > database machines). NONE OF THESE can afford to be down or crash. > > "NONE OF THESE"? Ever heard of Stratus Computer Corporation? > > Niall Actually, if I didn't care about the cost, Tandem makes some very good fault-tolerant machines. Of course the problem is "if you don't care about the cost". Reality is that building something 100% fail-proof is just not economically justified in the ISP business. In other lines of work, it is. However, being able to swap a CPU in 5 minutes (the only non-redundant component) is one thing. Having persistent OS crashes is entirely different. -- -- Karl Denninger (karl@MCS.Net)| MCSNet - Serving Chicagoland and Wisconsin http://www.mcs.net/ | T1's from $600 monthly to FULL DS-3 Service | NEW! K56Flex support on ALL modems Voice: [+1 312 803-MCS1 x219]| EXCLUSIVE NEW FEATURE ON ALL PERSONAL ACCOUNTS Fax: [+1 312 803-4929] | *SPAMBLOCK* Technology now included at no cost To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message