Not sure if it will directly help you but can help in indirectly.

This is 1080 TB (in 12 TB disks) in one server under ZFS:

https://vermaden.wordpress.com/2019/06/19/freebsd-enterprise...

For 100 TB you would get smaller server, like 2U with 12 slots filled with 10/12/14 TB disks for your 'usable' 100 TB space.

For more ZFS and/or FreeBSD storage options check this:

https://vermaden.wordpress.com/2020/02/12/freebsd-enterprise...

Hope that helps.

Regards.