Furthermore, one of my colleagues pointed out that your setup is not according to the RAC on VMware configuration guide:
http://www.vmware.com/files/pdf/solutions/oracle/Oracle_Databases_VMware_RAC_Deployment_Guide.pdf
The valid options are:
1. VMDK using multi-writer flag
2. Virtual mode RDMs using multi-writer flag
3. Physical mode RDMs using physical bus-sharing.
Consider reconfiguring your setup.
Michael.