From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Justin T. Gibbs" Subject: Re: AIC7902 lockups on Intel SMP (Re: HD somtimes hanging) Date: Thu, 24 Jul 2003 11:47:04 -0600 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <1382692704.1059068823@aslan.btc.adaptec.com> References: <20030724151233.E9280@laokoon.bug.net> <1059057411.6798.30.camel@carwash.duncangibb.com> Reply-To: "Justin T. Gibbs" Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Received: from magic-mail.adaptec.com ([208.236.45.100]:44166 "EHLO magic.adaptec.com") by vger.kernel.org with ESMTP id S263590AbTGXRaP (ORCPT ); Thu, 24 Jul 2003 13:30:15 -0400 In-Reply-To: <1059057411.6798.30.camel@carwash.duncangibb.com> Content-Disposition: inline List-Id: linux-scsi@vger.kernel.org To: Duncan Gibb , Thomas Beutin Cc: linux-scsi@vger.kernel.org > If I try to scan something, Xsane hangs for a while, then recovers OK. > But if I put a CD in the Yamaha drive, anything which touches the scsi > subsystem from then on will hang. It looks like you have a very flakey bus. The BSY line is probably glitching. In the trace you provided, we successfully selected the device at ID 3 and are waiting for the target to take us to the first phase. The REQ for that phase never occurs and in fact the BSY line is not always driven. Very, very weird. The target controls both the REQ and BSY lines, so this is either a problem with the target, your cabling, or your termination. -- Justin