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From: Don Yuniskis <dgy@rtd.com>
Message-Id: <199701081834.LAA19663@seagull.rtd.com>
Subject: Re: Two AHA1542CF scsi controllers on 2.1.5-RELEASE
To: champlin@virgil.pa.dec.com (Virgil Champlin)
Date: Wed, 8 Jan 1997 11:34:27 -0700 (MST)
Cc: dwhite@resnet.uoregon.edu, freebsd-questions@FreeBSD.ORG
In-Reply-To: <9701081707.AA18018@virgil.pa.dec.com> from "Virgil Champlin" at Jan 8, 97 09:07:25 am
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> >>Make sure the settings for both controllers are unique and don't overlap
> >>any other devices on the system.
> 
> Thanks for the response Doug.  This was my first thought too.  I believe
> I've done this and verified it by simply swapping the IO base address
> (IO_AHA0 and IO_AHA1) settings between the two cards and leaving
> everything else the same.  The other controller will begin to work as
> "aha0" and the first one now times out as "aha1".  -virgil

The "settings" also include IRQ and DRQ -- if these aren't disjoint,
I suspect you'll see much the same symptoms...