Create the tank zpool containing a raidz vdev spread over 3 devices. It is recommended that you use the persistent /dev/disk/by-id/* device names when creating your pool to avoid any device reordering issues latter. Your device names will of course be different.
$ sudo zpool create tank raidz scsi-SATA_Maxtor_7Y250M0_Y638RXME scsi-SATA_Maxtor_7Y250M0_Y638S56E scsi-SATA_Maxtor_7Y250M0_Y638TJFE $ sudo zpool status tank pool: tank state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM tank ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 scsi-SATA_Maxtor_7Y250M0_Y638RXME ONLINE 0 0 0 scsi-SATA_Maxtor_7Y250M0_Y638S56E ONLINE 0 0 0 scsi-SATA_Maxtor_7Y250M0_Y638TJFE ONLINE 0 0 0 errors: No known data errors
Your tank pool will automatically contain a filesystem which is mounted under your root directory. You can create additional filesystems with the zfs create command. They will also be automatically mounted.
$ sudo zfs create tank/fish $ df -h -t zfs Filesystem Size Used Avail Use% Mounted on tank 459G 128K 459G 1% /tank tank/fish 459G 128K 459G 1% /tank/fish
Some other useful zfs subcommands are mount, unmount, destroy, and snapshot. These are all fully described in the zfs man page and should be enough to get you started.