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Date:      Mon, 25 Mar 2013 15:50:20 -0500
From:      Graham Allan <allan@physics.umn.edu>
To:        freebsd-questions@freebsd.org
Subject:   8.3 hanging on boot, Dell 1950 with mfi and qlogic HBA
Message-ID:  <5150B88C.4050501@physics.umn.edu>

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I feel sure I'm missing something pretty obvious here but I can't figure 
out what.

I have a Dell 1950 which I just installed 8.3 (amd64) onto. It has an 
internal OS drive on mfi (Dell PERC) and a qlogic QLE2462 for external 
SAN connection.

Problem is, the machine hangs on boot if the SAN fiber is connected. It 
boots up fine if disconnected, then I can reconnect the fiber and mount 
the SAN drives.

When booting with fiber connected, it hangs after these messages:
kbd3 at ukbd1
kbd3: ukbd1, generic (0), config:0x0, flags:0x3d0000
ums1: <EP2 Interrupt> on usbus1
ums1: 3 buttons and [XYZ] coordinates ID=0
uhub5: 4 ports with 4 removable, self powered

(which just look like normal device probes) then if I reboot with the 
fiber disconnected, the next lines are:

Trying to mount root from ufs:/dev/mfid0s1a
start_init: trying /sbin/init

Verbose boot doesn't seem to give any additional clues.

I feel convinced it's failing to find or mount the root filesystem - 
I've certainly seen this in the past where an add-in HBA like this 
usurps the internal OS drive, fixable by hard-wiring the bus order in 
/boot/device.hints. That's what I thought of first here, but mfi doesn't 
use CAM (I guess), and the OS drive /dev/mfid0 isn't changing its device 
name...

and of course I'm not getting any root mount errors either.

Is there part of the boot mechanism I'm missing?

Graham
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Graham Allan
School of Physics and Astronomy - University of Minnesota
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