Removing the service controller: 2145-CG8 or 2145-CF8

You can remove the service controller in a SAN Volume Controller 2145-CG8 or 2145-CF8 node.

Before you begin

DANGER

Multiple power cords. The product might be equipped with multiple power cords. To remove all hazardous voltages, disconnect all power cords. (L003)

or

or

1. Read the safety information to which Preparing to remove and replace parts refers.
2. If you are intending to replace the service controller field-replaceable unit (FRU), use one of the following methods to read and record the WWNN of the node.
   • From the front panel, press the down button until Node: xxxx shows in the display. Press the right button until Node WWNN: nnnnn is displayed. Read and record the last 5-digits of the WWNN.
   • From the cluster vital product data (VPD), record the last five digits of the WWNN or the WWPN of the Fibre Channel ports.

   If you cannot obtain the WWNN with either method, obtain the information from your storage-attached network (SAN) switch.

3. If replacing the service controller: Follow the procedure in MAP 5350: Powering off a node to verify that hosts will not lose access to data in volumes before you power off the node.
4. Optional: Slide the node out on its slide rails to the fully extended position.

   You can leave the Fibre Channel and Ethernet cables connected, if you are using the cable-management arm and if you are not removing the node from the rack. 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.

   Fast path: You can perform this service procedure with the node in place.
5. Locate the recessed, blue service-controller release buttons on each side of the controller. See Figure 1.
   Figure 1. Left release button of a 2145-CG8 or 2145-CF8 service controller

   
6. Gently press both release buttons, shown by  2  in Figure 2, and release the catch while pulling gently forward on the service controller.

   The service controller moves slightly forward.

   Figure 2. Service controller for the 2145-CG8 or 2145-CF8 with attached USB cable

   
   •  1  Service controller
   •  2  Service-controller release buttons
   •  3  USB service-controller cable
   Attention: If you meet any resistance, do not pull harder, or you might damage the release mechanism.

   Stop pressing the release buttons once the service-controller locking mechanism clears the 2145-CG8 or 2145-CF8.

7. Pull the service controller fully out of the frame.

   If you are replacing a hot-swap drive, you can leave the service-controller cable attached to the service controller. Rest the service controller on another surface while removing and replacing the drive to prevent strain on the cable.

8. If you are intending to replace the service controller FRU, detach the USB cable, shown by  3  in Figure 3, from the service controller.
   Figure 3. SAN Volume Controller 2145-CG8 or 2145-CF8 service controller

   
9. 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.