install boot with raid 1 in 3 TB disks

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http://serverfault.com – I'm trying to install /boot in a RAID 1 using 3 TB disks. As the RAID partition do not let you manage partitions than more than 2 TB, CentOS automatically configures the partitions using GPT. My current machine (HP Proliant ML110 G4) does not support EFI/GPT so it uses MBR to boot the system. If I configured the /boot using a standard partition it works but it does not work if I installed the /boot using RAID 1. The system can not boot and it does not throw any error. Is it possible to install /boot in a RAID 1 with 3 TB disks if my system does not support EFI? I'm using CentOS 6.3. (HowTos)