San Volume Controller 2145-8G4 Service - IBM SAN Volume Controller 2145-CG8 Hardware Maintenance Manual

1) On the front-panel display, press and release the down button until the Node panel is
displayed. Then press and release the right button until the Node WWNN: panel is displayed.
2) Press and hold the down button, press and release the select button, and then release the down
button. The display switches into edit mode. Edit WWNN is displayed on line 1. Line 2 of the
display shows the last five numbers of the WWNN that is currently set. The first number is
highlighted.
3) Change the highlighted number to match the number from the VPD or from customer zoning.
Use the up and down buttons to increase or decrease the numbers. The numbers wrap F to 0
or 0 to F. Use the left and right buttons to move between the numbers.
4) When the displayed value matches the numbers in the VPD or customer zoning, press and
release the select button to accept the numbers. The Node WWNN: panel is displayed and the
second line shows the last five numbers of the restored WWNN.
Wait one minute. If Cluster: is displayed on the front panel, this indicates that the node is ready to be
added to the system. 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 2145-8G4 service controller
Use the following information to replace the SAN Volume Controller 2145-8G4 service controller.
To replace the service controller, perform the following steps:
1. Gently push the service controller (shown in Figure 87) into the frame until the rear connectors are
fully seated and the service controller front metal work is up to the frame.
Figure 87. SAN Volume Controller 2145-8G4 service controller
2. Slide the SAN Volume Controller 2145-8G4 back into the rack and check that all cables are still firmly
in place.
3. Connect the power cable to the node and replace the cable-retention bracket. See "Replacing the
cable-retention bracket" on page 39.
Note: The worldwide port names (WWPNs) of the Fibre Channel ports are derived from the
worldwide node name (WWNN) of the service controller. If you do not perform step 4, you might
have to re-zone the Fibre Channel switches if the switch zoning uses WWPN. You must restart the
host systems before they are able to access disks through this node.
4. 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.
Chapter 2. Removing and replacing parts
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