Which is better, Split or Monolithic VMware disk in a production enviroment?

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http://serverfault.com – Ok, so I have read a bunch of material on-line and curious as to your thoughts on split vs monolithic disk in a production environment. We are going to be building the VM server on a server that has 4TB of disk space in a RAID10 configuration. We have the OS (Ubuntu ext4) on a monolithic VM and are going to be adding another disk to the VM for the "data". Now since the new disk will have 3.5TB which is the best option, split disks or a monolithic disk? I have read pros and cons of each (Vmware Discussion) but I'm not sure what is the best option because of the disk size we going to be adding (HowTos)