I have a Windows 2008 Server with 2 HBA's directly connected to an AX150 in SP A0 and SP B0. I disconnected the SP B0 cable, then intentionally selected 'Remove from config' to see what would happen, figuring that there would be a simple way to add it back. I could not find one. I ended up reinstalling PowerPath and rebooting multiple times to get both SP's back online.
I noticed that there was a powermt restore command, but I couldn't get it to work. How do you recover an HBA that you remove?