From owner-freebsd-hackers Wed Apr 16 10:52:30 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id KAA18365 for hackers-outgoing; Wed, 16 Apr 1997 10:52:30 -0700 (PDT) Received: from hda.hda.com (hda-bicnet.bicnet.net [207.198.1.121]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id KAA18233; Wed, 16 Apr 1997 10:52:16 -0700 (PDT) Received: (from dufault@localhost) by hda.hda.com (8.8.5/8.8.5) id NAA13803; Wed, 16 Apr 1997 13:39:31 -0400 (EDT) From: Peter Dufault Message-Id: <199704161739.NAA13803@hda.hda.com> Subject: Re: Repeated UNIT ATTENTION, what is it, is this serious? In-Reply-To: from Seppo Kallio at "Apr 16, 97 06:14:36 pm" To: kallio@cc.jyu.fi (Seppo Kallio) Date: Wed, 16 Apr 1997 13:39:31 -0400 (EDT) Cc: hardware@FreeBSD.ORG, hackers@FreeBSD.ORG, kallio@cc.jyu.fi X-Mailer: ELM [version 2.4ME+ PL25 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk > Is this a sign of some hardware problem? SCSI cable, terminator, some disk > having malfunction? Or is this the aic7xxx driver problem I have heard? The unit attention errors are the drives informing you about the bus having been reset. That is a symptom and not a problem; the bus reset was done by the ahc driver after getting that time out. I can't answer as to WHY it timed out. Peter -- Peter Dufault (dufault@hda.com) Realtime Machine Control and Simulation HD Associates, Inc. Voice: 508 433 6936