From owner-freebsd-hackers Sun Dec 5 14:41:51 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from feral.com (feral.com [192.67.166.1]) by hub.freebsd.org (Postfix) with ESMTP id 83F2A14A0A for ; Sun, 5 Dec 1999 14:41:49 -0800 (PST) (envelope-from mjacob@feral.com) Received: from beppo.feral.com (beppo [192.67.166.79]) by feral.com (8.8.7/8.8.7) with ESMTP id OAA14911; Sun, 5 Dec 1999 14:42:55 -0800 Date: Sun, 5 Dec 1999 14:42:55 -0800 (PST) From: Matthew Jacob Reply-To: mjacob@feral.com To: Wilko Bulte Cc: Kelly Yancey , jkh@zippy.cdrom.com, dseg@texar.com, billf@chc-chimes.com, rfg@monkeys.com, freebsd-hackers@FreeBSD.ORG Subject: Re: Strange SCSI sickness In-Reply-To: <199912052150.WAA74217@yedi.iaf.nl> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > Another interesting cause for problems is duff powersupplies. As the > proverb goes "every machine is as good as it's PSU". E.g. I just struggeled > with a DLT tape unit that inexplicable reset itself. After examining the > 5Volts rail with a scope I found glitches on it whenever the drive did a > bit of rewinding (dropping out of streaming mode). Had me stumped for a > while. > That's pretty rare these days. It used to happen all the time when switching power supplies first appeared (motorboating is what we called it), but even recently I had a marginal supply that supplied 4.4VDC- *just* enough to function *most* of the time. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message