Removing the SAN Volume Controller 2145-CF8 service controller

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 is used in two separate removal and replacement procedures, which each have unique power requirements:

If you are replacing the service controller, this service action requires you to turn off the node and disconnect the USB service-controller cable.
If you are replacing a hot-swap drive, you do not have to turn off the node, and you can leave the service-controller cable attached to the service controller.

To remove the service controller, perform the following steps:

Read the safety information to which Preparing to remove and replace parts refers.
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 and record the five-digit number.
- 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.
If you are intending to replace the service controller FRU, verify that the node data is mirrored and synchronized, and that there are no dependent virtual disks before turning off the node.
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.
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.
If you must remove the node from the rack to work on it, perform the following procedure to turn off the node, remove all cables, and remove the node from the rack:
1. If you have not yet done so, verify that the node data is mirrored and synchronized, and that there are no dependent virtual disks before turning off the node.
  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.
2. Pull back the cable-management arm if you are working from the rear of the rack, or slide the node out of the rack to the fully extended rail position if you are working from the front.
3. 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.
4. 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.
5. Remove the node from the rack and place it on a flat, static-protective surface. See Removing the SAN Volume Controller from a rack.
Locate the recessed, blue service-controller release buttons on each side of the controller. See Figure 1.
Figure 1. Left release button of a SAN Volume Controller 2145-CF8 service controller
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 SAN Volume Controller 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 SAN Volume Controller 2145-CF8.
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. You can suspend the service controller by its cable, or rest it on another surface while removing and replacing the drive.
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-CF8 service controller
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.