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
- 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.
About this task
Table 1 lists the models and software
version requirements for nodes.
| Node model | Required system SAN Volume Controller 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 |
| SAN Volume Controller 2145-CG8 with two Fibre Channel adapters | 6.4.1.5 or later (any partner systems must have 6.4.0 or later) |
| SAN Volume Controller 2145-CG8 | 6.2.0 or later |
| SAN Volume Controller 2145-CF8 | 5.1.0 or later |
Note: The steps in the following procedure refer to uninterruptible
power supply units. SAN Volume Controller 2145-DH8 and
2145-SV1 do not have an
external uninterruptible power supply unit. These systems have battery modules in the front panel
instead.
Procedure
- Install the SAN Volume Controller nodes, and if applicable the uninterruptible power supply units, in the rack.
- Connect the SAN Volume Controller nodes to the LAN.
- Connect the SAN Volume Controller nodes to the SAN fabric (for example, the FC or FCoE ports).
- Power on the SAN Volume Controller nodes and, if applicable, the uninterruptible power supply units.
- Zone the SAN Volume Controller node ports in the existing SAN Volume Controller zone. The SAN Volume Controller zone exists in each fabric with only node ports.
- Zone the SAN Volume Controller node ports in the existing SAN Volume Controller and storage zone. A storage zone contains all of the SAN Volume Controller 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 SAN Volume Controller system, use the system management application to map the LUNs that are currently used by the system to all of the WWPNs of the SAN Volume Controller nodes that you want to add. The SAN Volume Controller nodes must recognize the same LUNs that the existing nodes in the system can recognize before they can be added. If SAN Volume Controller nodes cannot recognize the same LUNs, the system is marked degraded.
- Add the SAN Volume Controller 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 SAN Volume Controller nodes from the clustered system and contact IBM® Remote Technical Support for assistance.