Removing and replacing the SAN Volume Controller power-cable assembly

Make sure that power to the SAN Volume Controller is turned off before you remove the power-cable assembly. Turn off the node while ensuring that its data is mirrored and synchronized, as described in MAP 5350: Powering off a SAN Volume Controller node.

1. Check the SAN Volume Controller models 2145-CF8, 2145-8A4, 2145-8G4, 2145-8F4, and 2145-8F2 power LED ( 1  in Figure 1) or the SAN Volume Controller 2145-4F2 power light ( 2 ).
   • If the light is on, go to step 2.
   • If the light is either off or flashing, power has already been removed from the SAN Volume Controller. Go to step 7.
   Figure 1. Power LED on the SAN Volume Controller models 2145-CF8, 2145-8A4, 2145-8G4, and 2145-8F4 or 2145-8F2 operator-information panel and the power light on the SAN Volume Controller 2145-4F2 front panel

   
   •  1  Power LED
   •  2  Power light
   Important: SAN Volume Controller nodes operate in pairs. Both SAN Volume Controller nodes are in the same I/O group. One SAN Volume Controller must be operational if you are servicing the other SAN Volume Controller. If both SAN Volume Controller nodes are not functioning, you cannot access any of the disks in that I/O group.
2. Turn off the node while ensuring that its data is mirrored and synchronized. See MAP 5350: Powering off a SAN Volume Controller node for more information.
   
   Attention: If both SAN Volume Controller nodes are online, removing the power from one SAN Volume Controller causes some performance degradation because I/O operations are automatically rerouted through the other SAN Volume Controller. You must obtain customer agreement before you continue with this procedure.
3. Press and release the SAN Volume Controller models 2145-CF8, 2145-8A4, 2145-8G4, 2145-8F4, and 2145-8F2 power-control button  1  or the SAN Volume Controller 2145-4F2 power switch  2 , as shown in Figure 2. Wait one minute for the SAN Volume Controller to turn off. The other SAN Volume Controller nodes in the cluster might display an error code indicating that a node is missing from the cluster. Ignore this error code; it is automatically resolved when the repair is complete.
   Figure 2. SAN Volume Controller models 2145-CF8, 2145-8A4, 2145-8G4, and 2145-8F4 or 2145-8F2 power-control button and the SAN Volume Controller 2145-4F2 power switch

   
   •  1  Power-control button
   •  2  Power switch
4. For the SAN Volume Controller model 2145-CF8, pull back the cable-management arm, remove any cable ties or hook-and-loop fasteners that might be securing the power cords, and free the power cords from the cable-management arm.
5. For the SAN Volume Controller model 2145-CF8, 2145-8A4, 2145-8G4, or 2145-8F4, remove the cable-retention bracket, as described in Removing the cable-retention bracket.
6. Remove the cable-retention bracket from the 2145 UPS-1U, as described in Removing and replacing the 2145 UPS-1U power cable-retention bracket.
7. Remove the power cord from the back of the SAN Volume Controller node (or both power cords from the back of the SAN Volume Controller 2145-CF8).
8. Replace the power cord (or both power cords for the SAN Volume Controller 2145-CF8) and verify that the cord is seated (or that both power cords are seated).
9. Replace the SAN Volume Controller model 2145-CF8, 2145-8A4, 2145-8G4, or 2145-8F4 cable-retention bracket and the 2145 UPS-1U cable-retention bracket.
10. For the SAN Volume Controller model 2145-CF8, route the power cords on the cable-management arm, secure the power cords with cable ties or hook-and-loop fasteners, and close the cable-management arm.
11. If the SAN Volume Controller does not turn on automatically, press and release the power-control button or switch.
    Note: If the SAN Volume Controller 2145-4F2 is turned off and it is the only SAN Volume Controller 2145-4F2 node that is connected to the 2145 UPS, the 2145 UPS also turns off within five minutes. Before you turn on the SAN Volume Controller 2145-4F2, you must press the power-on button on the 2145 UPS. The 2145 UPS-1U turns off only when its power button is pressed, input power has been lost for more than five minutes, or the SAN Volume Controller node has shut it down following a reported loss of input power.