From owner-freebsd-hackers Sun Dec 3 20:17:42 1995 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id UAA21476 for hackers-outgoing; Sun, 3 Dec 1995 20:17:42 -0800 Received: from seagull.rtd.com (root@seagull.rtd.com [198.102.68.2]) by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id UAA21470 for ; Sun, 3 Dec 1995 20:17:38 -0800 Received: (from dgy@localhost) by seagull.rtd.com (8.6.12/8.6.9.1) id VAA20682; Sun, 3 Dec 1995 21:17:24 -0700 From: Don Yuniskis Message-Id: <199512040417.VAA20682@seagull.rtd.com> Subject: Re: No Thumbs??? (lack of concensus) To: msmith@atrad.adelaide.edu.au (Michael Smith) Date: Sun, 3 Dec 1995 21:17:24 -0700 (MST) Cc: freebsd-hackers@freefall.FreeBSD.org (FreeBSD hackers) In-Reply-To: <199512041420.OAA26356@genesis.atrad.adelaide.edu.au> from "Michael Smith" at Dec 4, 95 02:20:43 pm X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Length: 987 Sender: owner-hackers@FreeBSD.ORG Precedence: bulk It seems that Michael Smith said: > Jordan K. Hubbard stands accused of saying: > > Here's the rule of thumb: > > > > If dropping the transformer for the PS on your foot from waist height > > would break your foot, then the PS is big enough. :-) > > I have a set of E-cores (phillips I think) from a 750W 5V PSU kicking around > in a drawer here somewhere. The whole assembly, including windings and > frame, probably weighed about a kilo. > > Unless you have osteoperosis, this may bruise but not break. 8) Yeah, and if you get a good front-end switching at several hundred Khz, it probably wouldn't even *bruise*! Of course, that's *not* typical... :> > To answer the original question; a 60W switching supply will run a single > 30W 5.25" drive. It will _not_ run two of them, although it might look > like it will for a while. Fine. But I suspect it *would* run two 15W drives -- though the question of sequencing spindles might still be an issue at startup! Correct?