Migrating to DMP from Hitachi Data Link Manager (HDLM)
This procedure describes removing devices from HDLM control and enabling DMP on the devices.
Note: |
DMP cannot co-exist with HDLM; HDLM must be removed from the system. |
Plan for application and system downtime for the following procedure.
To remove devices from Hitachi Data Link Manager (HDLM) and enable DMP
- Stop the applications using the HDLM meta-device
- Unmount any file systems that use the pool on the HDLM device.
In a VCS environment, stop the VCS service group of the application, which will stop the application.
- Export the ZFS pools that use the HDLM device.
# zpool export poolname
- Uninstall the HDLM package.
- Turn on the DMP support for the ZFS pool.
# vxdmpadm settune dmp_native_support=on
- Reboot the system.
- After the reboot, DMP controls the devices. If there were any ZFS pools on HDLM devices they are migrated onto DMP devices.
- Mount the file systems.
- Restart the applications.