Is there a way to present a raw disk and have 2 Virtual Machines see the disk and share the data on the disk? I have present the raw disk to the vm's as a physical disk and the vm's see it but it appears that they are not able to see the data stored from each server. It appears that the raw disk is a separate disk on each vm.
Have the disk connected locally on one VM, then create a share if it's a Windows VM, or created an export and mount it up if it's a Linux VM.
VMFS is your only clustered file system, but not really applicable to what I think you are attempting to accomplish. You might want to elaborate on what it is you are trying to do...
Yep, you're asking for true clustering of that native LUN. Don't think the solution is a compromise in any way. You can achieve what you want to achieve, and it will still be very modular and flexible.