From owner-freebsd-hackers Wed Aug 28 00:53:23 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id AAA09958 for hackers-outgoing; Wed, 28 Aug 1996 00:53:23 -0700 (PDT) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id AAA09953 for ; Wed, 28 Aug 1996 00:53:20 -0700 (PDT) Received: from msmith@localhost by genesis.atrad.adelaide.edu.au (8.6.12/8.6.9) id RAA13407; Wed, 28 Aug 1996 17:22:48 +0930 From: Michael Smith Message-Id: <199608280752.RAA13407@genesis.atrad.adelaide.edu.au> Subject: Re: hackers-digest V1 #1415 To: regnauld@tetard.glou.eu.org (Philippe Regnauld) Date: Wed, 28 Aug 1996 17:22:48 +0930 (CST) Cc: smp@csn.net, hackers@FreeBSD.org In-Reply-To: <199608272023.WAA00389@tetard.glou.eu.org> from "Philippe Regnauld" at Aug 27, 96 10:23:59 pm MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk Philippe Regnauld stands accused of saying: > > why so, modern drives provide active termination, one less connector to > > cause problems... > > Because I've seen flaky such terminators, including reports here in > -hackers: whether the jumper was in or not, there would still be > problems (no probe, timeouts, hanging at boot). > > Also, it happens that you forget to terminate the new replacement > disk when you swap out the first disk on the cable. Without > mentioning when you insert a terminated disk in the middle of a > chain :-) So you just get one of those long 7 connector SCSI > ribbons and snap a terminator on one end. As I said, it's mostly > handy tips, I'm not forcing anyone to go and buy such a terminator > if they don't have one. Never, ever, _EVER_ terminate on a drive that is not in the same case as the controller. _Always_ use a terminator that plugs onto the daisy-out connector on the last case you're using. Wherever possible, use active terminators, and go for the ones that have LED's in them so that you can be absolutely certain that they have power. -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] Collector of old Unix hardware. "Where are your PEZ?" The Tick [[