From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264695AbUEJOFv (ORCPT ); Mon, 10 May 2004 10:05:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264700AbUEJOFv (ORCPT ); Mon, 10 May 2004 10:05:51 -0400 Received: from chaos.analogic.com ([204.178.40.224]:29576 "EHLO chaos.analogic.com") by vger.kernel.org with ESMTP id S264695AbUEJOFt (ORCPT ); Mon, 10 May 2004 10:05:49 -0400 Date: Mon, 10 May 2004 10:07:43 -0400 (EDT) From: "Richard B. Johnson" X-X-Sender: root@chaos Reply-To: root@chaos.analogic.com To: John Bradford cc: Shobhit Mathur , linux-kernel@vger.kernel.org Subject: Re: PCI excessive retry error In-Reply-To: <200405101231.i4ACVTa7000421@81-2-122-30.bradfords.org.uk> Message-ID: References: <20040510113303.20724.qmail@web51003.mail.yahoo.com> <200405101231.i4ACVTa7000421@81-2-122-30.bradfords.org.uk> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 10 May 2004, John Bradford wrote: > > I mentioned a "broken bus" in the beginning. Some new > > PCI boards are not 5-volt tolerant. If you plug them into > > the PCI bus of some motherboards (Intel 865PE chipset), > > The Intel D865PERL, for one, the PCI/Bus will get blown. > > Same with the MS-6585 (648 MAX board). I blew up several > > boards by plugging 3.5 volt PCI cards into the 5 volt > > bus. According to the rules, it's supposed to work unless > > the PCI slots have "Cadium Yellow" or "Brilliant Blue" > > keying plugs (I kid you not, it's in the PCI specs). > > So, did you actually plug the cards in to the wrong coloured slots, or > do you have a 3.5 volt-incompatible motherboard with a colour of slots > which suggests compatibility? > > John. > I have two broken motherboards that have off-white color slots that imply that they should certainly not blow up if anything that fits is plugged into them! So I plugged in two high-speed data-link boards and nothing worked. Upon removal of the boards, my SCSI controller was no longer seen on the PCI/Bus. I called the data-link board vendor (actually a division of this company) and they said; "Idiot! They are 3.5 volt boards!". I said; "Yeh? The PCI Spec says they should be compatible!" They said; "There is no PCI spec for such compatibility......", etc. etc. When I quoted the page on the book, they said; "That's only a BOOK, not a specification...." It's just like the l-k list. So, some new PCI/Bus boards are not 5-volt tolerant. Some new board slots run at 3.5 volts so older PCI/Bus boards won't work (some do, some don't). It's a mess. I also asked our wizards in the other division what kind of platform the boards were supposed to be working in. They said it was secret, but not a PC. Cheers, Dick Johnson Penguin : Linux version 2.4.26 on an i686 machine (5557.45 BogoMips). Note 96.31% of all statistics are fiction.