From owner-freebsd-hackers Sun Dec 5 14:46:24 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from monkeys.com (i180.value.net [206.14.136.180]) by hub.freebsd.org (Postfix) with ESMTP id 52EAE14A15 for ; Sun, 5 Dec 1999 14:46:21 -0800 (PST) (envelope-from rfg@monkeys.com) Received: from monkeys.com (localhost [127.0.0.1]) by monkeys.com (8.9.3/8.9.3) with ESMTP id OAA22947 for ; Sun, 5 Dec 1999 14:46:21 -0800 (PST) To: freebsd-hackers@FreeBSD.ORG Subject: Re: Strange SCSI sickness In-reply-to: Your message of Sun, 05 Dec 1999 16:15:51 -0500. Date: Sun, 05 Dec 1999 14:46:20 -0800 Message-ID: <22945.944433980@monkeys.com> From: "Ronald F. Guilmette" Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG In message , Kelly Yancey wrote: >> >> 3b) Examination of the drive(s) in question for any cooling or >> mounting deficiencies. Depending on the SCSI errors in question, >> I might even investigate firmware updates for the drive(s). >> > > I actually used to get these *exact* errors a couple of years ago on >various 2.x systems. At first, I had assumed a bug in the driver (the ahc >driver was noted as still having some bugs at the time, if I recall >correctly). The errors would rare (every month or so, but they would come >in batches). I kept upgrading, from 2.1.5, through 2.2.5 hoping that the >errors would go away. Now, my ignorance being point out, it turned out >that the errors were actually heat-induced. > I had 2 5-year old 7200RPM drives in each of the systems, that besides >being noisy, got pretty hot. Of course, they weren't hot when I mounted >them :), and I had mounted them right next to each other in the case. >It helped a little when I spaced the drives apart from each other. Then >I found these neat full-length expansion cards which have 2 fans mounted >on them. Got that situated to circulate additional air across the drives >and never had any problem since (those systems have been running for over >a year since without incident). Yowza. I found two web sites recently where a nice veriety of different types of useful cooling devices (mostly for PeeCee type systems) are available: http://www.3dcool.com/ and: http://www.icedmocha.com/ I bought two ``slot fans'' from www.icedmocha.com recently, and I think I'm sure now where one of those two fans is going. :-) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message