Using your plugin I found I can only mount one of my 4 drives:
Two of them show ZFS member (I experimented with FreeNAS at one point but rebuilt the array and everything was hunky dory)
What I am trying to do is recover some data from the disks I have removed (rebuilt onto 2x8TB) as they couldn't be read from backups and TBH not sure which disk the data was on. I think sde was my parity disk, if that is the case would that explain me being unable to mount it? Any idea what I could possibly do with these zfs member disks?