This causes a problem with VMware as it's disk usage requirements for install are a bit like Goldilocks - you can't have a disk too small, and you can't have a disk too large, and if you go over either of these boundaries you get VMware either not installing, or installing a default datastore which is a fraction of the size of the underlying disk (like the 1.47Tb datastore in my current 5.47Tb system).
You do know that ESX/ESXi VMFS3 has a maximum usable disk size of 2TB?
You should aim to create your logical RAID disks less than this value. RAID5 is a problem with large disks. Better to create several RAID1 disks.
You can create a VMFS3 volume up to 64TB by adding extents.
SD