You can use the SAN Volume Controller Console to
increase the size of a cluster by adding two nodes to create a new
I/O group.
Attention: If you are adding a node
that was previously removed from a cluster, ensure that either the
following two conditions have been met:
- The WWPN for the removed node is swapped with the node that replaces
it.
- All hosts that accessed the removed node through its WWPNs have
been reconfigured to use the WWPN for the new node.
Failure to do either of these actions can result in data corruption.
Before completing these steps, install the
new nodes and connect them to the fibre-channel.
This task assumes
that you have already launched the SAN Volume Controller Console.
Complete the following steps to add a node
to the cluster:
- Click to determine the I/O
group where the node will be added. The Viewing Input/Output Groups
panel is displayed.
- Record the name or ID of the first I/O group
that has a node count of zero (0). You only need to do this step
for the first node that is added. The second node of the pair uses
the same I/O group number.
- Click . The Viewing Nodes panel
is displayed.
- Select the node that you want to add from the list of available
candidate nodes.
- From the task list, select Add
a Node and click Go. The Adding
a Node to a Cluster panel is displayed.
- Select the node that you want to add to the cluster from
the Available Candidate Nodes list.
- Select the I/O group from the I/O Groups list.
Important: If you are adding a node that was previously
removed from the cluster, you must select the name of the I/O group
from which the node was previously removed. If you are adding a node
that has never been in a cluster, select the name of the I/O group
that you recorded in step
2.
- Click OK.
- Verify that the node is online by refreshing the Viewing
Nodes panel. You might have to close the panel and reopen it to refresh
the panel.
- Click the name of the node that you have added to the cluster.
The Viewing General Details panel is displayed.
- Click the General, Ports and Vital
Product Data tabs and record the following information:
- Node serial number
- Worldwide node name
- All of the worldwide port names
- The name or ID of the I/O group that contains the node
- Click Close to close the panel.
You may need to reconfigure your storage systems
to allow the new I/O group nodes to access them. If the disk controller
uses mapping to present RAID arrays or partitions to the cluster and
the WWNNs or the worldwide port names have changed, you must modify
the port groups that belong to the cluster.