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.

Procedure

  1. Install the IBM Spectrum Virtualize™ nodes, and if applicable the uninterruptible power supply units, in the rack.
  2. Connect the IBM Spectrum Virtualize nodes to the LAN.
  3. Connect the IBM Spectrum Virtualize nodes to the SAN fabric (for example, the FC or FCoE ports).
  4. Power on the IBM Spectrum Virtualize nodes and, if applicable, the uninterruptible power supply units.
  5. Zone the IBM Spectrum Virtualize node ports in the existing IBM Spectrum Virtualize zone. The IBM Spectrum Virtualize zone exists in each fabric with only node ports.
  6. Zone the IBM Spectrum Virtualize node ports in the existing IBM Spectrum Virtualize and storage zone. A storage zone contains all of the IBM Spectrum Virtualize node ports and storage system ports that are in the fabric and used to access the physical disks.
  7. For each storage system that is used with the IBM Spectrum Virtualize system, use the system management application to map the LUNs that are currently used by the system to all of the WWPNs of the IBM Spectrum Virtualize nodes that you want to add. The IBM Spectrum Virtualize nodes must recognize the same LUNs that the existing nodes in the system can recognize before they can be added. If IBM Spectrum Virtualize nodes cannot recognize the same LUNs, the system is marked degraded.
  8. Add the IBM Spectrum Virtualize nodes to the system.
  9. 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 IBM Spectrum Virtualize nodes from the clustered system and contact IBM® Remote Technical Support for assistance.

What to do next

For specific instructions about adding a new node or adding a replacement node to a clustered system, see the information about adding nodes to a system.
Parent topic: Initializing the IBM Spectrum Virtualize system