This is a real bummer, because I have 6x 14 TB Seagate Exos NAS drives, and wanted 2-disk redundancy with all drives installed.
But now I'll have to disconnect a drive to use 5 drives with 1-disk redundancy, and leave me with a spare 14TB disk sitting there to serve as a replacement in case of a failure.
QUESTION: Will I be able to later add the 6th disk and have 2-disk redundancy, or will I have to wipe and recreate a new storage pool when RAID-Z2 becomes available?