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Modifying SLM reporting nodes

If you are moving a LUN or a volume containing LUNs to another HA pair within the same cluster, you should modify the Selective LUN Map (SLM) reporting-nodes list, before initiating the move. This ensures that active/optimized LUN paths are maintained.

Steps

  1. Add the destination node and its partner node to the reporting-nodes list of the aggregate or volume: lun mapping add-reporting-nodes -vserver vserver_name -path lun_path -igroup igroup_name [-destination-aggregate aggregate_name | -destination-volume volume_name]
    If you have a consistent naming convention, you can modify multiple LUN mappings at the same time by using *-igroup instead of igroup.
  2. Rescan the host to discover the newly added paths.
  3. Add the new paths to your MPIO configuration.
  4. Run the command for the needed move operation and wait for completion.
  5. Verify that I/O is being serviced through the Active/Optimized path: lun mapping show -fields reporting-nodes
  6. Remove the previous LUN owner and its partner node from the reporting-nodes list: lun mapping remove-reporting-nodes-remote-nodes -vserver vserver_name -path lun_path -igroup igroup_name
  7. Verify that the LUN has been removed from the existing LUN map: lun mapping show -fields reporting-nodes
  8. Remove stale device entries for the host OS.
  9. Rescan the host to verify removal of old paths.
    See your host documentation for specific steps to rescan your hosts.