…if you want to use snapshots
Q: What’s the maximum size VMDK you could create in vSphere 5.1 or earlier? A: Most people that have studied for VCP will know the maximum VMDK size is 2TB minus 512 bytes.
Pop Quiz Q: What’s the maximum number of disks per SCSI Controller?
A: It depends.. On your VCP exam, you would have said 15. Correct.
Although if you want to clone or snapshot and quiesce a VM, the maximum is 7 disks per SCSI controller.