Ok - I have tried two 2TB drives (Seagate 7200 and WD Blue) as well as two different adapters...
I am gettiing the same behaviour on all combinations - any idea? When I do a format in the X3 bios it seems like it does something, but when i boot into evox slayer 2.7 (from dvd) it shows all drives (c,e,f,g) as 0 bytes. And when I tell it to do a "full rebuild - upgraded HDD" it looks like it is copying, but again - it won't boot from the drive - it drops into BIOS.
I have also messed with the settings for "all on F, or 137GB on F, and the rest on G".
Matt