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.

1. Read the safety information to which Preparing to remove and replace parts refers.
2. Follow the procedure in MAP 5350: Powering off a SAN Volume Controller node to verify that the node data is mirrored and synchronized, and that there are no dependent virtual disks (VDisks) 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.
   
5. Optional: If you must remove the node from the rack to work on it, perform the following procedure to remove all cables and remove the node from the rack:
   1. To make sure that you can replace all cables in the same ports from which they were removed, label the port position of each fibre-channel and Ethernet cable; then remove all cables from the back of the node.
      
   2. Remove the node from the rack and place it on a flat, static-protective surface. See Removing the SAN Volume Controller from a rack.
      
6. Remove the top cover. See Removing the top cover.
   
7. Remove the service controller from the SAN Volume Controller 2145-CF8, as described in Removing the SAN Volume Controller 2145-CF8 service controller.
8. Remove or replace the USB service-controller cable.

   To remove the USB service-controller cable, perform the following procedure:

   1. Disconnect the USB cable ( 1  in Figure 1) from the service controller ( 2 ).
      Figure 1. Removing and replacing the USB cable in the SAN Volume Controller 2145-CF8 service controller

      

      •  1  USB cable
      •  2  USB connector
   2. Locate the USB connector ( 1  in Figure 2) on the left side of the SAN Volume Controller 2145-CF8.
      Figure 2. USB service-controller cable connected to the disk controller and USB riser card in the SAN Volume Controller 2145-CF8

      

      •  1  USB connector on the disk controller and USB riser card
      •  2  USB cable
   3. Grasp the blue lockbar ( 2  in Figure 3) and slide it toward the USB riser-card assembly ( 3 ) to the unlock position and remove the USB cable ( 1 ) from the connector.
      Figure 3. USB service-controller cable connector on the USB riser card

      
   4. Remove the cable from the node.

   To replace the USB service-controller cable, perform the following procedure:

   1. To reinstall the cable, carefully thread the USB cable through disk-drive bay 5, routing the larger connector of the cable to the USB connector ( 1  in Figure 2) on the USB riser card.

      Route the cable beneath any red SAS cables that are attached to the disk backplane.

   2. Align the USB service-controller cable ( 1  in Figure 3) with the connector on the USB riser-card assembly ( 3 ) and push it into the connector until it is firmly seated.
   3. Slide the blue lockbar ( 2 ) toward the USB service-controller cable to the locked position until it is seated firmly.
   4. Install the other end of the USB cable in the USB connector ( 2  in Figure 1) on the rear of the service controller.
   5. Carefully install the service controller, as described in Replacing the SAN Volume Controller 2145-CF8 service controller.
      Important: Ensure that the USB cable is pushed back into the empty drive bay, and ensure that the cable is not trapped above or below the bay.
9. After replacing the cable and the service controller, perform the procedure to replace the top cover, as described in Replacing the top cover.

   After performing the procedure, the node is reinstalled in the rack with the power on.