From owner-freebsd-hackers Sun Dec 5 13:16:29 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from kronos.alcnet.com (kronos.alcnet.com [63.69.28.22]) by hub.freebsd.org (Postfix) with ESMTP id 47BAB14CE2 for ; Sun, 5 Dec 1999 13:16:26 -0800 (PST) (envelope-from kbyanc@posi.net) X-Provider: ALC Communications, Inc. http://www.alcnet.com/ Received: from localhost (kbyanc@localhost) by kronos.alcnet.com (8.9.3/8.9.3/antispam) with ESMTP id QAA35945; Sun, 5 Dec 1999 16:15:51 -0500 (EST) Date: Sun, 5 Dec 1999 16:15:51 -0500 (EST) From: Kelly Yancey X-Sender: kbyanc@kronos.alcnet.com To: "Jordan K. Hubbard" Cc: Dan Seguin , Bill Fumerola , "Ronald F. Guilmette" , freebsd-hackers@FreeBSD.ORG Subject: Re: Strange SCSI sickness In-Reply-To: <44943.944427579@zippy.cdrom.com> 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 > > 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). Kelly -- Kelly Yancey - kbyanc@posi.net - Richmond, VA Director of Technical Services, ALC Communications http://www.alcnet.com/ Maintainer, BSD Driver Database http://www.posi.net/freebsd/drivers/ Coordinator, Team FreeBSD http://www.posi.net/freebsd/Team-FreeBSD/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message