From owner-freebsd-hackers Tue Mar 3 14:03:11 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id OAA20098 for freebsd-hackers-outgoing; Tue, 3 Mar 1998 14:03:11 -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 OAA20068 for ; Tue, 3 Mar 1998 14:02:54 -0800 (PST) (envelope-from shimon@sendero-fxp0.simon-shapiro.org) Received: (qmail 17602 invoked by uid 1000); 3 Mar 1998 22:09:56 -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: <19980303155120.43579@mcs.net> Date: Tue, 03 Mar 1998 14:09:56 -0800 (PST) Reply-To: shimon@simon-shapiro.org Organization: The Simon Shapiro Foundation From: Simon Shapiro To: Karl Denninger Subject: Re: SCSI Bus redundancy... Cc: hackers@FreeBSD.ORG, Julian Elischer Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On 03-Mar-98 Karl Denninger wrote: ... > You want the heads off the active media surface and the write gate off > *now* > if you detect a power failure. ``now'' is a relative term. f you are writing a sector, you want ``now'' to be ``just as soon as the sector is done''. Power failure is not instantenous. It is a short event, but takes some time. Those old drives that sported ``command completion'' lost less data upon power failure than these new ``1,000,000 MTBF 10,000RPM as lnog as I do not get warm even once'' drives. They also cost a lot more per megabyte, vibrated real nice and loud and kept my garage warm ieven in the dead of winter. Ah, the good old days... :-) ---------- Sincerely Yours, Simon Shapiro Shimon@Simon-Shapiro.ORG Voice: 503.799.2313 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message