Adding nodes to an existing system

Before you add a node to an existing system, consider this high-level overview of the requirements and tasks involved.

Before you begin

This task requires that the following conditions are met:

All nodes that are configured in the system are present. Nodes must be installed in pairs. Each pair of nodes is an I/O group.
All errors in the system event log are fixed.
All managed disks (MDisks) are online.
A node with only Fibre Channel over Ethernet (FCoE) ports (all FCoE ports) that is connected to the switch and properly zoned can also be added to an I/O group.

Table 1 lists the models and software version requirements for nodes.

Table 1. Node models and software version requirements
Node model	Required system software version
SAN Volume Controller 2145-SV1	7.7.1.0 or later
SAN Volume Controller 2145-DH8 with a 2145-12F expansion enclosure	7.7.0.0 or later
SAN Volume Controller 2145-DH8 with a 4-port 16G Fibre Channel adapter	7.6.0.0 or later
SAN Volume Controller 2145-DH8 with a 2-port 16G Fibre Channel adapter	7.4.0.0 or later
SAN Volume Controller 2145-DH8	7.3.0.0 or later

Install the system nodes in the rack.
Connect the nodes to the LAN.
Connect the nodes to the SAN fabric. For example, connect to the FC or FCoE ports on the nodes.
Start the nodes.
Zone the node ports in the existing zone. The system zone exists in each fabric with only node ports.
Zone the node ports in the existing system and storage zone. A storage zone contains all of the system node ports and storage system ports that are in the fabric and used to access the physical disks.
For each storage system that is used with the system, use the system management application to map the LUNs that are currently used by the system to all of the WWPNs of the system nodes that you want to add. The nodes must recognize the same LUNs that the existing nodes in the system can recognize before they can be added. If the system nodes cannot recognize the same LUNs, the system is marked degraded.
Add the nodes to the system.
Check the status of the storage systems and MDisks to ensure that status is not marked degraded. If the status is degraded, a configuration problem must be resolved before you can do any further system configuration task. If the problem cannot be resolved, remove the newly added nodes from the clustered system and contact your system support center for assistance.

For specific instructions about adding a node or a replacement node to a clustered system, see the information about adding nodes to a system.