7.0 Panic under network load

I ran a test system with a Dual 1.8Ghz opteron and
HT1000 chipset. I had a traffic generator running
loading the system to about a 50% cpu load. Sometime
in the middle of the night, the box crashed with the
initial message

AD4 FAILURE - device detached

Below are screenshots of the crash debug trace:

http://good-times.webshots.com/album/562770794vGgPAL

There was heavy network activity and very little disk
activity (just the normal system logs I guess).

What could be the problem here?

Barney


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