Managing Serviceguard 13th Edition, February 2007

Cluster and Package Maintenance
Reconfiguring a Cluster
Chapter 7332
Create CVM disk groups from the CVM Master Node:
• For CVM 3.5, and for CVM 4.1 without CFS, edit the configuration
ASCII file of the package that uses CVM storage. Add the CVM
storage group in a STORAGE_GROUP statement. Then issue the
cmapplyconf command.
• For CVM 4.1 with CFS, edit the configuration ASCII file of the
package that uses CFS. Fill in the three-part DEPENDENCY
parameter. Then issue the cmapplyconf command.
Similarly, you can delete VxVM or CVM disk groups provided they are
not being used by a cluster node at the time.
NOTE If you are removing a disk group from the cluster configuration, make
sure that you also modify or delete any package control script that
imports and deports this disk group. If you are removing a disk group
managed by CVM without CFS, be sure to remove the STORAGE_GROUP
entries for the disk group from the package ASCII file. If you are
removing a disk group managed by CVM with CFS, be sure to remove
the DEPENDENCY parameter.
Serviceguard manages the VERITAS processes, specifically gab and LLT.
As a result, the administration commands such as gabconfig, llthosts,
and lltconfig should never be used for administering a cluster. It is
safe to use the read-only uses of these commands, such as gabconfig -a.
But an administrative command could potentially crash nodes or an
entire cluster.