About the DiskGroupSnap agent
The DiskGroupSnap agent verifies the VxVM diskgroups and volumes for site awareness and disaster readiness in a campus cluster environment. To perform a fire drill in campus clusters, you must configure a resource of type DiskGroupSnap in the fire drill service group.
To perform fire drill, the application service group must be online at the primary site.
During fire drill, the DiskGroupSnap agent does the following:
For each node in a site, the agent correlates the value of the SystemZones attribute for the application service group to the VxVM site names for that node.
For the diskgroup in the application service group, the agent verifies that the VxVM site tags are defined for the diskgroup.
For the diskgroup in the application service group, the agent verifies that the disks at the secondary site are not tagged with the same VxVM site name as the disks at the primary site.
The agent verifies that all volumes in the diskgroup have a plex at each site.
See Veritas Cluster Server Bundled Agents Reference Guide for more information on the agent.