Check your OS very closely, because some 32-bit versions
cannot address partitions larger than 2TB e.g. Basic Disks
under 32-bit XP.
64-bit versions can easily address more than 2TB.
Also, if one does not need to boot from such a partition,
some third-party RAID controllers allow Variable Sector Sizing
("VSS") e.g. Highpoint, which will permit partitions to exceed
2 TB under XP 32-bit.
The problem is complicated by permutations varying by
OS version, RAID type, and 32-v-64 bit logical addressing: