The high availability fire drill detects discrepancies between the VCS configuration and the underlying infrastructure on a node; discrepancies that might prevent a service group from going online on a specific node.
For Process resources, the high availability fire drill checks for:
The existence of a binary executable for the specified process (program.vfd)
The existence of the same binary on all nodes (program.vfd)
For more information refer to the Cluster Server Administrator's Guide.