All I needed was a simple restart 😓 . I think this finally worked, or at least it seems connected to the drive as a mirror. I attached another support file, just to be sure.
Is there a way I can properly check to see it's been mirrored?
I'm sorry to have wasted time on such a simple issue, but I am very appreciative of
the help you have provided!
A 4 drive mirror is very redundant!
What you can do is "validate" the volume sometime. It is a background task, so it won't interfere with your work. (it uses only 50% of disk throughput availability)
then you know all bits on all drives are identical.