Wait one minute. If Cluster: cluster_name is displayed, the node has rejoined the cluster. If Cluster:
does not display, see "MAP 5000" in the IBM System Storage SAN Volume Controller Troubleshooting Guide to
determine how to solve this problem or contact the IBM support center.
Replacing the SAN Volume Controller 2145-8A4 service controller
Use the following information to replace the SAN Volume Controller 2145-8A4 service controller.
To replace the service controller, perform the following steps:
1. Gently push the service controller (shown in Figure 86) into the frame until the rear connectors are
fully seated and the service controller front metal work is up to the frame.
2. Connect the power cable to the node and replace the cable-retention bracket. See “Replacing the
cable-retention bracket” on page 39.
Note: If you replaced the service controller as part of concurrent maintenance, you must rewrite the
WWNN on the new service controller. If you do not, and the Fibre Channel switch zoning uses
WWPNs, you cannot add the node back into the cluster until the Fibre Channel switches in the SAN
are re-zoned. Also, the host systems cannot access the Fibre Channel ports on that node until the host
systems are rebooted.
To restore the WWNN, perform the following steps:
a. Determine the WWNN for the node by examining the vital product data (VPD) of the node or the
zoning that is defined in the SAN switch. Record the last five numbers of the WWNN for the
node that you are working on.
b. Start the node by performing a node rescue.
c. Change the node WWNN by performing the following steps:
svc00471
Figure 86. SAN Volume Controller 2145-8A4 service controller
98 IBM SAN Volume Controller Hardware Maintenance Guide
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