From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 7 Jun 2001 16:02:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 7 Jun 2001 16:02:22 -0400 Received: from penguins-world.pcsystems.de ([212.63.44.200]:30704 "HELO schottelius.org") by vger.kernel.org with SMTP id ; Thu, 7 Jun 2001 16:02:07 -0400 Message-ID: <3B1FDD9F.49E55D9B@pcsystems.de> Date: Thu, 07 Jun 2001 22:01:35 +0200 From: Nico Schottelius X-Mailer: Mozilla 4.76 [en] (X11; U; Linux 2.4.5 i686) X-Accept-Language: en MIME-Version: 1.0 To: Khalid Aziz CC: Linux Kernel Mailing List Subject: Re: scsi disk defect or kernel driver defect ? In-Reply-To: <3B1FAA63.130E556A@pcsystems.de> <3B1FD67D.8DFDAE58@pcsystems.de> <3B1FDB64.1AB850CF@fc.hp.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Khalid Aziz wrote: > Nico Schottelius wrote: > > > > Hi all! > > > > The problem is solved, if I disconnect the hp streamer > > from the bus. I wonder why there is a problem. > > The aic7880 has two busses: > > > > ultra/ ultrawide. > > > > The ibm hard disk is connected to the uw port and is terminated. > > No other uw device is attached. > > > > The hp streamer is also lonely on the ultra bus. I have > > no documentation for that device, so I don't know > > whether it is terminated nor if it is using parity. > > > > Btw, can somebody explain what the parity bit does to me ? > > > > Or does anybody have a hp c1536 streamer and can help me ? > > Based upon the lspci output you posted earlier, aic7880 has a single > SCSI bus. Oh. That could really be a problem.. I though having two different connectors on the board would make two different buses.. I must have been wrong. > So you must mean two internal connectors. Both of your devices > (HD and Tape) do show up on the same bus during scan. Since you have > connected devices to both connectors on the card, you must terminate > both devices. Okay, so far I understood. > Sounds like you HD might be terminated. It is. > You need to terminate tape drive as well. It seems like it is impossible: > I do not have a C1536 handy, the problem is I do have :) > but if you look at the back of the drive you should see 10 pins aligned > horizontally. No. And that's the real problem. I can see the following: 2 - 1 -0 for the id (every one with two pins), NC (one pin). Under the device is a small claviar. I mean a small think, a bank with small switches on it. reading from left to right: 1 - 2 -3 - 4 -5 -6 -7 -8. If the switch is up, it is on. -- | o | on | | -- -- | | off. | o | -- I hope you understand what I mean to say with thoses ascii figures. Does anybody know what to do with these switches ? Nico ps: oh, you are from hp, that's the reason why you know so much about this device ;) > They should all be labelled on the back panel and most > likely are (from left to right) - TP, 2, 1, 0, NC. TP is the pair of > Term Power Enable pins. Place a jumper over the leftmost two pins to > enable termination on the drive and try again. > > -- > Khalid > > ==================================================================== > Khalid Aziz Linux Development Laboratory > (970)898-9214 Hewlett-Packard > khalid@fc.hp.com Fort Collins, CO > > Disclaimer: I do not speak for HP. These are my personal opinions.