Adding a control enclosure to an existing system

To add a control enclosure to an existing system (release 8.7.0 and earlier), you must first install it in the rack.

To add a control enclosure to an existing system, complete the following steps.

1. Install the support rails for the new control enclosure.
2. Install the new control enclosure in the rack.
3. Connect the node canisters to the storage area network (SAN). If a 25 Gbps or faster Ethernet connection is applicable to your system, you can connect through Ethernet.
4. Configure the zoning on the SAN switches to allow Fibre Channel (FC) ports, if applicable, to connect to each other.

   The new node canisters might use RDMA over Ethernet to communicate with other node canisters. When you use RDMA over Ethernet, use the service assistant or the satask chnodeip command to set the node IP of each node in the system.

5. If the control enclosure was previously used as an I/O group in another system, its system data must be cleared before it can be reused. To do so, see Procedure: Removing a control enclosure from a system.

   Otherwise, continue to step 6.

6. Start the management GUI on the existing system.
7. In the management GUI, select Monitoring > System. On the System -- Overview page, select Add Enclosure. When a new enclosure is cabled correctly to the system, the Add Enclosure action automatically displays on the System -- Overview page. If this action does not appear, review the installation instructions to ensure that the new enclosure is cabled correctly. You can also add an enclosure by selecting Add Enclosure from the System Actions menu.
8. Complete the instructions in the Add Enclosures wizard until the control enclosure is added to the system.
9. If exactly two control enclosures are in the system, you must set up a quorum disk or application outside of the system. If the two control enclosures lose communication with each other, the quorum disk prevents both I/O groups from going offline. For more information, see Quorum.