PowerHA SystemMirror

The PowerHA® SystemMirror summary page provides a summary of your system resources, the status of those resources, and links to common management tasks.

Health Summary

This section provides a status summary of the nodes and resource groups across all of your clusters. The number of nodes or resource groups in each category is represented in a chart and an adjacent list.

The following status categories apply to the Summary of node status across all clusters and Summary of resource group status across all clusters sections:

question icon Unknown
The status cannot be attained. Components are in the Unknown category if there is a loss of communication between the IBM® Systems Director server and the controlling node.
ok icon OK
All components are operating properly.
information icon Not Configured
Nodes in this category have either not been added to a cluster or they have been defined as part of a cluster but the cluster configuration process is not completed. To complete the cluster configuration process, synchronize the affected node.
warning iconNot synchronized
Nodes in this category contain changes that were made only on the controlling node; therefore, these changes do not exist on the other nodes of the cluster.
If this state occurs on the controlling node of a cluster, you can correct the problem by doing one of the following tasks:
  • Synchronize the cluster, which propagates the changes that were made on the controlling node to all of the other nodes in the cluster.
  • Discard all of the unsynchronized changes that are on the controlling node.
If this state occurs on another cluster node, changes that were made to that node will be erased during a synchronization process. To avoid that situation, perform the following steps:
  1. Make the Not synchronized node become the controlling node.
  2. Refresh the cluster data to load the current cluster configuration from the perspective of the selected node.
  3. Evaluate the configuration on the node, and determine whether you will keep the changes on this node (by synchronizing the cluster) or discard the changes.
warning icon Warning
Clusters in this category reported one or more conditions that require administrator attention.
offline icon Offline
Nodes in this category do not have active cluster services, are not hosting any managed resources, and are not highly available. To return these nodes to a high availability state, start cluster services by bringing them online.
offline icon Unmanaged
Nodes in this category do not have active cluster services, but all of the formerly managed resources continue to run on them. Nodes in this state are not highly available.

Administrators change the status of nodes to the Unmanaged state so that maintenance can be performed on PowerHA SystemMirror systems without creating downtime for the managed resources on those nodes. To return these nodes to a high availability state, start cluster services on them.

error icon Error
Clusters in this category reported one or more error conditions. User interaction is required.

Cluster Management

Manage Clusters
Provides a link to the Manage Clusters page where you can perform and monitor cluster management tasks.
Create a Cluster
Provides a link to the Create Cluster wizard that can help you complete all of the steps that are necessary to create a cluster.

Resource Group Management

Manage Resource Groups
Provides a link to the Manage Resource Groups page where you can perform and monitor resource groups tasks.
Add a Resource Group
Provides a link to the Add a Resource Group wizard that can help you complete all of the steps that are necessary to create a resource group.