This is nothing new. I think you're almost done.
I believe this used to be gharp9a and gharp9b, so I have formatted and remounted this drive as 2 1.4TB partitions as /gharp9a and /gharp9b and created files on each partition to identify them as gharp9a/gharp9b.
I've also re-instated a cronjob on tumulus that will keep the disk "awake" by doing some quick file operations on each partition once every 2-3 minutes.
The directories are owned by obs:obs
Switching from bug to feature request