I've installed mergerfs but in the mergerfs section I cannot create a new pool. The create dialog has changed quite a bit, there's no way to choose a hard disk like in OMV5 instead there's a 'shared folder' setting. In the shared folder input field I cannot choose a hard drive or anything else. I want to create the pool first before continuing with a shared folder.
How do I create a new pool with my mounted hard disks?