Thanks @guy.davis I'm planning to use the storage for Plex as well.
I guess my main worry is how to manage a large JBOD, say I have 24 disks, I want to be able to keep an eye on their health, also mounting 24 disks individually and balancing the capacity would probably be a pita.
Hence the JBOD array, 1 mount, good monitoring and the allocator evenly distributing the files across the 24 disks.
Say I caught the Chia bug and went to 48 disks, thats a lot of admin.
So I'm looking for something simple that lets me manage and monitor a heap of disks with minimal work.
Cheers
Richard