Dynamic Multi-Pathing (DMP) provides a Dynamic Reconfiguration tool to simplify the replacement of new LUNs from an existing target ID. Each LUN is unmapped from the host. DMP issues an operating system device scan and cleans up the operating system device tree.
In a cluster, perform the steps on all the nodes in the cluster.
To replace LUNs dynamically from an existing target ID
For LUNs using AIX LVM over DMP devices, remove the device from the LVM volume group.
# reducevg vgname pvname
The output displays a list of LUNs that are available for replacement. A LUN is available for replacement if there is no open on the LUN, and the state is online or nolabel.
After the removal completes successfully, the Dynamic Reconfiguration tool prompts you to add a LUN.
DMP updates the operating system device tree and the VxVM device tree. The newly-discovered devices are now visible.