I don’t know, if it is possible to help you.
One last try. Let’s try to change the mountpoint of your pool:
1. Export the pool:
2. Set a new mountpoint:
—> If this doesn‘t work, you may need to create the directory first:
3. Import the pool:
4. Look for zpool status:
Show us the output of all commands.
Maybe you don’t need to export/import the pool to change the mountpoint. So, if step 2 doesn’t work, because there is no pool imported, you only need to execute step 2 (and 4).
Regards Hoppel