I'm only setting it up as a single-drive unit - the drive is a brand-new Seagate ST2000DL004-HD204UI (2TB) - have tried using both X-Raid2 and Flex-Raid configuration.
I did try an alternative drive - WDC20EARS-OOMVWB0 - this had previously been used in a PC, but I wiped it clean and deleted all partitions etc before trying it in the ReadyNAS.
Everything sets up fine with the NAS, it goes through the SetUp procedure, Testing, Create Volume etc., creates shares, I can change password, set fixed IP address, change host name, etc., but as soon as I reboot the unit all the customised settings are lost. I am then prompted to go through the whole installation/setup routine yet again.
Tech Support are investigating and I have just forwarded them copies of the System Log Files, so will see if they can solve this one!!