Expansion rack

This section answers questions that are related to expansion rack in IBM Fusion HCI System.

  1. On a base rack with a 4+2p scale cluster, can we add only 3 storage nodes from the expansion rack with 6 storage nodes to OpenShift® Container Platform and reserve the rest of the nodes for future consumption?
    No. To maintain the scale cluster quorum, on a 4+2p scale cluster, all 6 storage nodes must be added to the cluster.
  2. Is rack Expansion support on Data Foundation cluster.
    Yes, it supports on Data Foundation cluster. The auxiliary rack must have minimum three storage nodes, and all the NVMe disks size must be of same size across all the nodes.
  3. If storage nodes on the initial rack have 4 NVMe drives per node. Can I add nodes with 2 NVMe drives per node to the expansion racks of the cluster?
    Yes, for Data Foundation. The storage nodes in the initial and expansion racks can have different numbers of NVMe drives.

    For example, the initial rack can have 6 NVMe drives in the storage nodes, and the storage nodes in the expansion rack can have 4 NVMe drives.

  4. Can I expand the rack only to increase the compute capacity by using IBM Fusion HCI System expansion multi-rack?
    No, it is not possible to add compute capacity without adding the minimum of six storage nodes. To increase the compute capacity, add them along with minimum required storage nodes.