IBM SAN Volume Controller, Hardware Maintenance Manual

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10. If you are intending to replace the service controller FRU, label the one that you are removing to
avoid a possible worldwide node name (WWNN) conflict if the service controller is ever reused.
Note: When you replace a service controller, it is normal to change the worldwide node name
(WWNN) of the new service controller to match the one that is being replaced. In this case, you will
have two service controllers with the same WWNN. Clearly label the service controller that you are
removing and indicate that its WWNN is now a duplicate and that it must not be connected to a
SAN before its WWNN is reset.
Removing and replacing the SAN Volume Controller 2145-CF8 service controller
cable
You can remove and replace the USB service-controller cable in the SAN Volume Controller 2145-CF8.
DANGER
Multiple power cords. The product might be equipped with multiple power cords. To remove all
hazardous voltages, disconnect all power cords.
This service action requires you to remove the cover and:
v
Turn the node off.
v Disconnect the power cables.
v
Disconnect or reconnect the USB service-controller data cable.
Perform the following steps to remove or replace the service controller cable.
1.
Read the safety information to which “Preparing to remove and replace parts” on page 20 refers.
2. Follow the procedure in MAP 5350 in the IBM System Storage SAN Volume Controller 2145
Troubleshooting Guide to verify that the node data is mirrored and synchronized, and that there are no
dependent volumes before turning off the node.
3. Slide the node out on its slide rails to the fully extended position.
You can perform most service actions when the node is fully extended from the rack on its slide rails.
If the location of the node in the rack is too high or too low to work comfortably, you can remove the
node from the rack.
4. When the node is completely turned off, remove the cable-retention brackets and disconnect the
power cables, as described in “Removing the cable-retention bracket” on page 29.
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2
3
2
svc00245b
Figure 78. SAN Volume Controller 2145-CF8 service controller
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IBM SAN Volume Controller Hardware Maintenance Guide