From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from cthulhu.engr.sgi.com (cthulhu.engr.sgi.com [192.26.80.2]) by neteng.engr.sgi.com (971110.SGI.8.8.8/960327.SGI.AUTOCF) via SMTP id PAA42176 for ; Sun, 25 Jan 1998 15:43:37 -0800 (PST) Return-Path: Received: (from majordomo-owner@localhost) by cthulhu.engr.sgi.com (950413.SGI.8.6.12/960327.SGI.AUTOCF) id PAA08774 for linux-list; Sun, 25 Jan 1998 15:41:08 -0800 Received: from hollywood.engr.sgi.com (hollywood.engr.sgi.com [150.166.61.38]) by cthulhu.engr.sgi.com (950413.SGI.8.6.12/960327.SGI.AUTOCF) via ESMTP id PAA08759 for ; Sun, 25 Jan 1998 15:41:06 -0800 Received: from cthulhu.engr.sgi.com (cthulhu.engr.sgi.com [192.26.80.2]) by hollywood.engr.sgi.com (940816.SGI.8.6.9/960327.SGI.AUTOCF) via ESMTP id PAA02070; Sun, 25 Jan 1998 15:41:01 -0800 Received: from sgi.sgi.com (sgi.engr.sgi.com [192.26.80.37]) by cthulhu.engr.sgi.com (950413.SGI.8.6.12/960327.SGI.AUTOCF) via ESMTP id PAA08723; Sun, 25 Jan 1998 15:40:56 -0800 Received: from informatik.uni-koblenz.de (mailhost.uni-koblenz.de [141.26.4.1]) by sgi.sgi.com (950413.SGI.8.6.12/970507) via ESMTP id PAA15562; Sun, 25 Jan 1998 15:40:54 -0800 env-from (ralf@uni-koblenz.de) From: ralf@uni-koblenz.de Received: from uni-koblenz.de (pmport-18.uni-koblenz.de [141.26.249.18]) by informatik.uni-koblenz.de (8.8.8/8.8.8) with ESMTP id AAA25477; Mon, 26 Jan 1998 00:40:52 +0100 (MET) Received: (from ralf@localhost) by uni-koblenz.de (8.8.7/8.8.7) id TAA03221; Sun, 25 Jan 1998 19:14:45 +0100 Message-ID: <19980125191445.00880@uni-koblenz.de> Date: Sun, 25 Jan 1998 19:14:45 +0100 To: fisher@sgi.com Cc: Alex deVries , alan@lxorguk.ukuu.org.uk, linux@hollywood.engr.sgi.com, William Fisher Subject: Re: wd33c93 errors. References: <199801230012.QAA28870@hollywood.engr.sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.85e In-Reply-To: <199801230012.QAA28870@hollywood.engr.sgi.com>; from William Fisher on Thu, Jan 22, 1998 at 04:12:18PM -0800 Sender: owner-linux@cthulhu.engr.sgi.com Precedence: bulk On Thu, Jan 22, 1998 at 04:12:18PM -0800, William Fisher wrote: > I am getting the details but it seems that something is amiss > with the "standard" PC SCSI devices in this area. There is also > some fuzzy-ness going on in the device type they are advertizing > themselves to be. I will have the gory details shortly since we > would like to understand the problem. We have had a couple of > customers complain about this problem. Certain revisions of the wd33c93 recognicable by the number group 00-04 and the word PROTO printed on them (at least in the DIL case) have a problem in the microcode that may hang the chip until the next hardware reset. Unfortunately tons of these prototype versions have been shipped. The only way to run these chips reliable is to disable disconnect/reconnect. By my experience it looks as if not all devices produce that type of disconnect/reconnect bug. I never saw it happen for example during lowlevel formatting a SCSI disk but attempting to use disconnect/reconnect with QIC tapes was a 100% way for me to hang my system. No idea about other types of devices. Ralf