From owner-freebsd-hardware Wed Mar 18 12:15:32 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id MAA13437 for freebsd-hardware-outgoing; Wed, 18 Mar 1998 12:15:32 -0800 (PST) (envelope-from owner-freebsd-hardware@FreeBSD.ORG) Received: from smtp2.xs4all.nl (smtp2.xs4all.nl [194.109.6.52]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id MAA13425 for ; Wed, 18 Mar 1998 12:15:22 -0800 (PST) (envelope-from schofiel@xs4all.nl) Received: from diamond.xs4all.nl (enterprise.xs4all.nl [194.109.14.215]) by smtp2.xs4all.nl (8.8.8/8.8.8) with SMTP id VAA04808 for ; Wed, 18 Mar 1998 21:15:10 +0100 (CET) Message-ID: <35102BAE.D61@xs4all.nl> Date: Wed, 18 Mar 1998 21:16:46 +0100 From: Rob Schofield Reply-To: schofiel@xs4all.nl X-Mailer: Mozilla 3.04Gold (Win95; I) MIME-Version: 1.0 To: freebsd-hardware@FreeBSD.ORG Subject: Re: CD-R and Scanner recomendations for CD archiving of records? References: <350FC5B5.55B1@xs4all.nl> <35101227.A1274725@wavefront.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Michael Porter wrote: > > > The problem is the power reaching the drives, which has to be > > hyper-smooth (have you ever seen the current spike on a 5V line caused > > by a modern disk performing a long cross-disk seek? Think of > > Everest/Buzz saw, you're along the right lines) > > Hmmm...Wouldn't a nice sized capacitor work well here? When I get another > computer I'm going to link the P/Ss together with caps(P/S=power supply, and > cap=capacitor in case you didn't know). That'll give me insurance from these > things blowing out too. Since the computer will be controlling my house (when > I build it starting next year :) I can't have that computer go off! > > I would think a couple of large caps would get rid of any transient problem > (well, there is another kind of transient problem, but that's not in this > discussion ;) > As for the size of capacitors--come on, when was the last time the cover was on > your computer?? Errr... Michael, I hope you're not planning on connecting caps to the supply side (110 AC in the US) of your supply; if you are, then I think you're in for a nasty shock (sorry about the pun). Seriously, don't do it. If this is what you intend, then you should go and buy a good make UPS, rated at twice your required offline load rating. Rob Schofield To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message