I'm using a fresh installation of FreeNAS-8.3.0-RELEASE-p1-x64 (r12825) and I've got a problem with the zfs setup.
For example: When I create a new ZFS volume using the GUI with my 2TB harddrive the GUI says Status "UNKNOWN". So I started over and used the commandline to create the pool via
zpool create /dev/ada1
This is working at first, but exporting and importing says "corrupted data" with no way of importing it. I tried other drives - all are failing on the console this way. I tried brand new drives and old drives. Funny thing is, that my other drives are working on on the GUI at first - but exporting and importing is failing too (e.g. during restart).