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It's not clear what you plan give at finish.
One box with two controllers or two box with single ?
It's look like configured password on controller. You can clear ( reset to default) via serial connection.
In the end we would like to have two enclosures with one controller each. We thought it would be easier to flash them together, since they had the same firmware anyway. I have reset the passwords using the serial console before, but I did so again just now, to no avail (same errors). Too bad there is no hardware reset button or anything...
I was able to resolve this issue by pulling out the controllers out and put them in another, working 2540 array, one at a time. This way, they both copy the data from the active controller, causing them to both have the same firmware and nvsram. After that I set the redundancy to simplex and placed them into their own enclosures with wiped disks (so they don't copy an old nvsram backup from disk).