From owner-freebsd-scsi Wed Jun 7 2:49:38 2000 Delivered-To: freebsd-scsi@freebsd.org Received: from proxy.sindigit.pt (proxy.sindigit.pt [62.229.85.2]) by hub.freebsd.org (Postfix) with ESMTP id C498E37B7A7 for ; Wed, 7 Jun 2000 02:49:34 -0700 (PDT) (envelope-from jm@sindigit.pt) Received: (from jm@localhost) by proxy.sindigit.pt (8.9.3/8.9.3) id KAA73397; Wed, 7 Jun 2000 10:48:07 +0100 (WEST) (envelope-from jm@sindigit.pt) X-Authentication-Warning: proxy.sindigit.pt: jm set sender to jm@sindigit.pt using -f Date: Wed, 7 Jun 2000 10:48:07 +0100 From: Jose Monteiro To: John Cc: "Kenneth D. Merry" , John Lengeling , freebsd-scsi@FreeBSD.ORG Subject: Re: Dying connection? Message-ID: <20000607104807.O46433@sindigit.pt> References: <20000601212248.A96817@panzer.kdm.org> <4.3.1.2.20000531193727.00ac2af0@mail.udel.edu> <3935DAA5.7859492B@raccoon.com> <20000531233754.A88537@panzer.kdm.org> <393724F1.B90D3283@raccoon.com> <20000601212248.A96817@panzer.kdm.org> <20000605105023.B44716@sindigit.pt> <4.3.1.2.20000606224635.00ad3450@mail.udel.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4.3.1.2.20000606224635.00ad3450@mail.udel.edu>; from papalia@udel.edu on Tue, Jun 06, 2000 at 10:47:16PM -0400 X-No-Archive: Yes Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On 07/06/00 03:47 WEST, John wrote: > >after testing and testing (different disks, new controller, etc...) > >the problem turned out to be a faulty motherboard. Specificaly, one > >of the pci slots (curiously, an unused one) had electrical problems > >and thus the bus resets and master aborts. > > Now, forgive my ignorance (since in this case, it truly is ignorance), but > how do you actually find an electrical problem with an unused pci > slot? Multimeter and a lot of patience? actually, during the box setup, i sometimes noticed problems detecting any card installed on that particular slot. the suspicion arose and i isolated the slot, but kept using the board. probably some piece of metallic debris has fallen into the slot, or something similar. Justin Gibbs pointed out that having a faulty (even unused) pci slot is cause for parity errors on the pci bus. other causes can be an unproperly seated card or a faulty trace or chip connection on the motherboard. Jose Monteiro To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message