Large Partition Problems.

I have a system with a 3ware 9000-12 card with 12 250GB harddrives running fedora core2. I am wanting to use this setup with lvm2 but am having some problems with it. When I use the entire device /dev/sdb I can setup up the entire array ~2.3TB but when I try to partition the array ( I really need to) I can only get a maximum of ~230GB partition and the rest of the space is unusable. Is there anyone out there that has seen this problem or know how to fix it. Thanks

Judd Tracy
[email protected]