Cannot create a ZFS Raid

[SCB]

Just built my first Freenas box. Everything is working well, except that in the ZFS volume manager, when I select all four disks I have the options of mirror or stripe, but not raidz. I've tried reinstalling Freenas with no luck. If I configure the storage for mirror, it works and shares great, but I can't configure for Raidz.

I have four SATA WD RED 3TB drives and 8G of RAM.

Any help would be much appreciated.

 

[dlavigne]

That's strange... Which version of FreeNAS? Are you using the slider to select the 4 disks so that they all 4 show up in the same row?