Yeah that’s what I’m thinking of doing now, backup everything important just in case and continue to work on it.

Thankfully I can identify any disk rather easily with the command you mentioned (used it before to grab a drives serial number which is printed on the drive its self).

The number you’re talking about is in reference to the old disk. I had swapped out the old drive and when I tried to run the command

Pool replace pool device [new_device]

It yelled at me that I needed to reference the old drive as well? So I’m not sure why it didn’t work the way you said it should