SRM - Possibility of Auto failover and Auto failback (No manual intervention)

1. Auto Failover from Site A to Site B with out manual intervention?
2. Auto Failback from Site B to A with out manual interventaion?
3. What will happen if Single virtual machine fails?
4. What will happen if OS fails in any virtual machine? Only restoring from back up or any other solution?
5. We have EMC VNX identical storage in both sites with mirror view storage replication (Active/Passive). Does this support VMware SRM?

Thanks in advance for your valuable comments and suggestions.