This procedure describes removing devices from EMC PowerPath control and enabling DMP on the devices.
Make sure that all paths belonging to the migrating PowerPath devices are in healthy state during the migration.
Plan for application downtime for the following procedure.
To remove devices from EMC PowerPath control and enable DMP
In a VCS environment, stop the VCS service group of the application, which will stop the application.
# varyoffvg vgroupname
# vxdisk rm emcpowerXXXX
Where emcpowerXXXX is the name of the EMC PowerPath device.
# powermt unmanage dev=pp_device_name or # powermt unmanage class=array_class
# powermt display dev=all
# vxdisk scandisks
# vxdmpadm settune dmp_native_support=on
The above command also enables DMP support for LVM root.