From owner-freebsd-scsi@FreeBSD.ORG  Thu Aug  1 20:33:42 2013
Return-Path: <owner-freebsd-scsi@FreeBSD.ORG>
Delivered-To: freebsd-scsi@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTP id 1E1B69D2
 for <freebsd-scsi@freebsd.org>; Thu,  1 Aug 2013 20:33:42 +0000 (UTC)
 (envelope-from ken@kdm.org)
Received: from nargothrond.kdm.org (nargothrond.kdm.org [70.56.43.81])
 (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by mx1.freebsd.org (Postfix) with ESMTPS id DA794295F
 for <freebsd-scsi@freebsd.org>; Thu,  1 Aug 2013 20:33:41 +0000 (UTC)
Received: from nargothrond.kdm.org (localhost [127.0.0.1])
 by nargothrond.kdm.org (8.14.2/8.14.2) with ESMTP id r71KVBHU015812;
 Thu, 1 Aug 2013 14:31:11 -0600 (MDT)
 (envelope-from ken@nargothrond.kdm.org)
Received: (from ken@localhost)
 by nargothrond.kdm.org (8.14.2/8.14.2/Submit) id r71KVBhF015811;
 Thu, 1 Aug 2013 14:31:11 -0600 (MDT) (envelope-from ken)
Date: Thu, 1 Aug 2013 14:31:11 -0600
From: "Kenneth D. Merry" <ken@freebsd.org>
To: Dan Langille <dan@langille.org>
Subject: Re: ahc0 cannot see attached devices
Message-ID: <20130801203111.GA15203@nargothrond.kdm.org>
References: <11DCA597-E79A-4834-9CC9-EBE1AADE99D3@langille.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <11DCA597-E79A-4834-9CC9-EBE1AADE99D3@langille.org>
User-Agent: Mutt/1.4.2i
Cc: freebsd-scsi@freebsd.org
X-BeenThere: freebsd-scsi@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: SCSI subsystem <freebsd-scsi.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-scsi>,
 <mailto:freebsd-scsi-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-scsi>
List-Post: <mailto:freebsd-scsi@freebsd.org>
List-Help: <mailto:freebsd-scsi-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-scsi>,
 <mailto:freebsd-scsi-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 01 Aug 2013 20:33:42 -0000

On Thu, Aug 01, 2013 at 15:48:13 -0400, Dan Langille wrote:
> I am in the process of moving a tape library from one server to another. 
> 
> The old server is running FreeBSD 8.4-RELEASE and using:
> 
> ahc0: <Adaptec 2944 Ultra SCSI adapter> port 0xa800-0xa8ff mem 0xfb7df000-0xfb7dffff irq 20 at device 5.0 on pci1
> 
> 
> The new server is running FreeBSD 9.1-RELEASE-p4 and using:
> 
> ahc0: <Adaptec 2940B Ultra2 SCSI adapter> port 0xe800-0xe8ff mem 0xfebdf000-0xfebdffff irq 21 at device 3.0 on pci4
> 

IIRC, the 2944 is a HVD (High Voltage Differential) card.  The 2940 is a
single ended or LVD card.  You can't connect HVD SCSI devices to a non-HVD
card.

> 
> While the new server boots, I don't see an Adaptec card BIOS prompt / mention pass by on the console.   Is this the first problem to solve?

That is somewhat curious, but what you really need is an HVD card in your
new server.

> If I detach the tape library and attach it to the old server, I do see the expect results (the following paste is missing non-tape related results):
> 
> <QUANTUM DLT8000 0250>             at scbus12 target 4 lun 0 (sa1,pass12)
> <OVERLAND LXB 0524>                at scbus12 target 6 lun 0 (pass14,ch1)

Ken
-- 
Kenneth Merry
ken@FreeBSD.ORG