Hi Phil,
So, I fully expected one of those first four combinations to work. I don't know why they didn't. The fsck version dates to 2013, so it might be something related to that. My next step would be to try all of this after booting into a modern environment, like the rescue cd from sysrescuecd.org. Recheck serial numbers and device names again, if you do that.
I tried the first four combinations with latest sysrescuecd, but the results are the same.
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