Operations required for devices to be managed by HDLM

To prepare a device that is already operating:

If any devices to be managed by HDLM are operating, you need to perform the following procedure.

1. Terminate all processes of applications that are accessing devices to be managed by HDLM.

2. If necessary, back up all devices that are to be managed by HDLM.

3. Unregister the devices.

   If a device to be managed by HDLM is registered in a program, including cluster software (excluding the volume management software), release the registration.

   When accessing a device that is to be managed after HDLM installation, the setting name used until now cannot be used for access because the logical device file name for the HDLM device that HDLM creates is used.

4. Unmount the disks.

   If the disks to be managed by HDLM were mounted by specifying SCSI devices, unmount the disks and then install HDLM in a static environment.

   First, check the current settings. Execute the following command:

   # mount

   The current settings will be output as shown in Figure 1.

   Figure. Execution results of the mount command

   The shaded portion shows the SCSI device to be managed by HDLM. Execute the following command on this SCSI device to unmount it:

   # umount /mntpt

5. If the disks are set to be mounted automatically when the host starts, delete this setting from the /etc/fstab file.

   An example of how to edit the /etc/fstab file is shown in Figure 2.

   Figure. Example of how to edit the /etc/fstab file

   Comment out the shaded portions by placing a hash mark (#) at the beginning of each line.