From owner-freebsd-scsi Wed Feb 25 10:13:15 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id KAA10948 for freebsd-scsi-outgoing; Wed, 25 Feb 1998 10:13:15 -0800 (PST) (envelope-from owner-freebsd-scsi@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 KAA10891 for ; Wed, 25 Feb 1998 10:13:05 -0800 (PST) (envelope-from shimon@sendero-fxp0.simon-shapiro.org) Received: (qmail 6261 invoked by uid 1000); 25 Feb 1998 18:19:41 -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: <199802251354.FAA18637@silvia.HIP.Berkeley.EDU> Date: Wed, 25 Feb 1998 10:19:41 -0800 (PST) Reply-To: shimon@simon-shapiro.org Organization: The Simon Shapiro Foundation From: Simon Shapiro To: scsi@FreeBSD.ORG Subject: Re: SCSI Bus redundancy... Cc: hackers@FreeBSD.ORG, blkirk@float.eli.net, tom@sdf.com Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On 25-Feb-98 Satoshi Asami wrote: ... > * Someone the freebsd-scsi list is working on this. Rather than a > simple > * backup design, he is working on simultanous use of both host adapters > at > * the same time, by two separate computers. The two systems communicate > to > * make sure they don't step on each others toes when accessing the > disks. > * The idea is to make a fully fault-tolerant cluster. Yup. There is more to it too. Automatic hot standby, true, functional hot pluggable everything, full redundancy, IP switchover, self monitoring and error recovery, etc. We support RAID-0, RAID-1, RAID 5. Currently only up to 45 drives per array, but that will change too. While the system is NOT a classic Fault Tolerant, it allows you to build various servers theat will provide uninterrupted service with single component failure ---------- Sincerely Yours, Simon Shapiro Shimon@Simon-Shapiro.ORG Voice: 503.799.2313 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message