Setting Up Storage
Now that you are logged in to the web interface, it is time to set up TrueNAS storage. These instructions describe a simple mirrored pool setup, where half the selected disks are used for storage and the other half for data protection. However, there are many configuration possibilities for your storage environment!
You can read more about these options in Creating Storage Pools. You can also use the ZFS Capacity Calculator and ZFS Capacity Graph to compare configuration options.