To add new LUNs dynamically to a new target ID

1. Prior to any dynamic reconfiguration, ensure that the dmp_cache_open tunable is set to on. This setting is the default.

   # vxdmpadm gettune dmp_cache_open

   If the tunable is set to off, set the dmp_cache_open tunable to on.

   # vxdmpadm settune dmp_cache_open=on

2. Identify which LUNs to add to the host. Do one of the following:

   • Use Storage Array Management to identify the Array Volume ID (AVID) for the LUNs.

   • If the array does not report the AVID, use the LUN index.

3. Map/mask the LUNs to the new target IDs on multiple hosts.

4. Scan the operating system device.

   Repeat step 2 and step 3 until you see that all the LUNs have been added.

5. Use VxVM to perform a device scan. You must perform this operation on all nodes in a cluster. Enter one of the following commands:

   • # vxdctl enable

   • # vxdisk scandisks

6. Refresh the DMP device name database using the following command:

   # vxddladm assign names

7. Verify that the LUNs were added correctly by answering the following questions:

   • Do the newly provisioned LUNs appear in the vxdisk list output?

   • Are the configured paths present for each LUN?

   If the answer to any of these questions is "No," return to step 2 and begin the procedure again.

   If the answer to all of the questions is "Yes," the LUNs have been successfully added. You can now add the LUNs to a disk group, create new volumes, or grow existing volumes.

   If the dmp_native_support tunable is set to ON and the new LUN does not have a VxVM label or is not claimed by a TPD driver then the LUN is available for use by LVM.