The high availability fire drill detects discrepancies between the VCS configuration and the underlying infrastructure on a node. These discrepancies might prevent a service group from going online on a specific node.
For DiskGroup resources, the high availability fire drill checks for:
The Veritas Volume Manager license
Visibility from host for all disks in the disk group
The same disks for the disk group on cluster nodes
Equal number of plexes on all sites for the disk group in a campus cluster setup
For more information about using the high availability fire drill see the Cluster Server Administrator's Guide.