Turns out that I was missing the p410i controller failure message because the option ROM messages were not being displayed.
1783-Slot 0 Drive Array Controller Failure Command Failure cmd=0h, err=00h, dlu=013:5h
The failure appears to be related to:
http://h20564.www2.hpe.com/hpsc/doc/public/display?docId=mmr_kc-0126313
So the controller starts up fine without the drives or with only one of them installed. I am hesitant to fail the other drive with the hope that the server starts with only one drive.
The article above suggests upgrading the firmware on the controller may fix the problem, but since the server wont boot, I can only do that with an offlline Proliant Service Pack. And since the server is out of warrenty, I don't have a reasonable way to get the Service Pack from HP.
Anyone willing to share their copy of HP SPP version 2014.09?