From owner-freebsd-questions Tue Oct 31 17:03:38 1995 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id RAA07312 for questions-outgoing; Tue, 31 Oct 1995 17:03:38 -0800 Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id RAA07295 for ; Tue, 31 Oct 1995 17:03:32 -0800 Received: from msmith@localhost by genesis.atrad.adelaide.edu.au (8.6.9/8.6.9) id LAA05044; Wed, 1 Nov 1995 11:33:17 +1030 From: Michael Smith Message-Id: <199511010103.LAA05044@genesis.atrad.adelaide.edu.au> Subject: Re: Help with scsi MEDIUM ERROR... To: mbarkah@hemi.com (Ade Barkah) Date: Wed, 1 Nov 1995 11:33:17 +1030 (CST) Cc: freebsd-questions@FreeBSD.org In-Reply-To: <199510311902.MAA09025@hemi.com> from "Ade Barkah" at Oct 31, 95 12:02:10 pm Content-Type: text Content-Length: 2169 Sender: owner-questions@FreeBSD.org Precedence: bulk Ade Barkah stands accused of saying: > We recently encountered the following message on one of our systems: > > sd1(aha0:1:0): MEDIUM ERROR info:f9370 asc12,0 Address mark not found > for id field field replaceable unit: d8 sks:80,0 > , FAILURE (there were also a few retry messages before the FAILURE.) > > The environment is FreeBSD 2.0.5-950622-SNAP, the disk in question > is a 2gb Seagate Barracuda connected to an Adaptec 1542-CF. > > My questions are... what kind of conditions might cause the error > message ? Now that it has happened, what type of further failures > can I expect, and what precautions should I take ? Your Barracuda is probably too hot; you may need to arrange extra ventilation for it. The message means that the drive couldn't find a sector that it needed, and retrying didn't help. Most likely caused by overheating causing malfunctioning of some part of the drive circuitry, or possibly thermal distortion beyond tolerance of one or more parts of the drive. If you leave the drive in its current situation, it will fail completely soon, and data written in an overheated state may possibly be unrecoverable once the drive cools again. > The machine is still up and running... should I fsck partitions > on the disk to make sure everything is ok ? Open the box and touch the disk. If it's too hot, you need extra ventilation; if possible, arrange this without powering the disk down to avoid thermal shock. ("too hot" is when you can't keep your fingers comfortably on any part of the drive for an indefinite period.) Barracudas, although less with the newer ones, are notorious for producing _lots_ of heat. You can't just mount them in a standard PC case and expect them to survive. (Yours is not one of the "newer" ones.) > -Ade Barkah -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] My car has "demand start" -Terry Lambert UNIX: live FreeBSD or die! [[