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Date:      Mon, 8 Feb 1999 07:28:28 -0800 (PST)
From:      "Justin T. Gibbs" <gibbs@FreeBSD.ORG>
To:        adrian@ubergeeks.com, gibbs@FreeBSD.ORG, freebsd-bugs@FreeBSD.ORG, gibbs@FreeBSD.ORG
Subject:   Re: kern/9927
Message-ID:  <199902081528.HAA63783@freefall.freebsd.org>

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Synopsis: the ahc driver doesn't correctly grok switched SCSI channels

State-Changed-From-To: open->suspended
State-Changed-By: gibbs
State-Changed-When: Mon Feb 8 07:23:01 PST 1999
State-Changed-Why: 
The 3940 series of controllers look to the system as two independent
SCSI controllers.  For this reason it is difficult to modify the attach
order to match the BIOS channel configuration setting.  A correct solution
involves allowing CAM drivers to prioritize their channels during the
probe sequence so that they can be sorted prior to attach.  This is not
as trivial a problem to solve as it may seem since you probably want to
do things like detect if a particular channel has the boot drive and
bump its priority.  I plan to look into this at some point, but not in
the immediate future.

In the mean time, man scsi(4) and read the section on hardwiring devices.
You can force the channels to attach in any order with this mechanism.


Responsible-Changed-From-To: freebsd-bugs->gibbs
Responsible-Changed-By: gibbs
Responsible-Changed-When: Mon Feb 8 07:23:01 PST 1999
Responsible-Changed-Why: 
CAM and ahc maintainer.

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