I had this problem in February of 2014. Basically, the date of the post is the date that I tried to perform the upgrade.
This problem has never been fixed, that I am aware of. At the time that I performed this upgrade I did not have a RAID card in the server.
The only way that I could recover from the problem was to downgrade the server firmware to the prior release. Since then I have not tried to update the firmware. I was hoping to hear about a fix through this thread before wasting my time again.
I am surprised that there is interest in this thread almost 1 year later. I had given up and almost forgot about this thread until I got the notice today.
FWIW, I also posted the same thing on the VMWare support boards and got crickets over there as well.
I wish that I had more to offer, but unfortunately, I don't.
I am hopeful that there is some renewed interest in this and that they will finally work on fixing it.