I can Install Vmware Vsphere on a new server with 4.7 TB Lun disk

Hi.

Recently I get a new server, Dell R710, this server have six disks with 1 TB each, I configured a Raid 5 with the 6 disk, now when I try to install ESX 4.1, I see the controller card with 4.7 TB of space, but I can't selec it.