I have a new Dell 2950 with a Perc 6i raid controller. This server has
4GB of ram and 6 x 750GB sata drives. The raid controller shows the
correct size of available space (about 4.3tb). When I go to install
NW6.5 sp7, it shows about 2tb of disk available for use.

I'm using the Perc 6i driver that comes with SP7 (mega_sas.ham v1.06.05.

How do I get the remainder of the storage space available?