Chris Wahl of the Wahl Network comments:
Several months ago, I took the time to upgrade all of my Supermicro home lab servers to BIOS version 2.0c. This was required to begin using my Emulex UCNA 10 Gb cards, as documented in the The Easy Button for Supermicro BIOS Upgrades. However, it wasn’t until recently that I noticed that the ability to use DirectPath I/O was no longer available. Yikes!
Great walkthrough for reenabling something that should never have been turned off in the first place. Firmware updates should add features, not take them away.