Before performing an upgrade installation or re-installation of HDLM, you must unmount the HDLM devices that correspond to HDLM-managed devices, and then back up the HDLM-managed devices.
Terminate the processes of all applications that access the disks managed by HDLM.
Unmount the HDLM devices.
If HDLM-managed devices have been mounted by specifying HDLM devices, unmount them.
If HDLM devices are configured to be mounted automatically when the host starts, edit the /etc/fstab file to remove the setting.
An example of how to edit the /etc/fstab file is shown in the following figure:
Comment out the shaded portions by placing a hash mark (#) at the beginning of each line.
If necessary, back up HDLM-managed LUs (for example, to a tape or disk). Follow the instructions of the backup software to back up the LUs.
Perform this operation if necessary.