[CentOS] CentOS 6.6 64-bit won't install on a 3 TB disk

> I'm having an issue getting a C6.6 install to work on a 3 TB dual hard
>drive system, raid 0. I'm hoping that someone here can help.

1: Is this system booting UEFI or BIOS?
2: Is the disk partitioned with MBR or GPT?
3: Is /boot on its own partition?

3TB drives are larger than MBR and BIOS properly support, so they're 
only really expected to work on a system partitioned with GPT and 
booting via UEFI.  And in that case, /boot and /boot/efi need to be 
individual partitions.