Have a 435T/9000 with currently 0.5 + 1TB HDD. Want to two 3TB Hitachi drives with RAID1.  Installed everything and upon bootup the two drives only showed 750GB using RAID1, but I was hoping for 3TB!!!    Not sure why I was limited to 750GB?  Has anybody any clue why I was limited to 750GB.  Spoke to Dell and they said they can RAID 2TB.  Does this mean my 3T is not supported by the firmware?  Any suggestions would be most appreciated.