Removing HDLM

To remove HDLM:

Note

• If the system initiates path health checking or automatic failback while HDLM is being removed, an error message (KAPL04023) might be output to syslog. However, HDLM operations are not affected.

• If you remove HDLM, the error logs (/var/tmp/hdlminstlog/installhdlm[01-10].log) generated during installation of HDLM are not removed. Delete the /var/tmp/hdlminstlog/installhdlm[01-10].log files as needed.

  For details on the installhdlm[01-10].log files, see KNOWLEDGE_REQUIRED_BEFORE_YOU_INSTALL_HDLM=GUID-69A0FDD9-885B-413A-9759-C700E383C811=3=EN=.html.

1. Log on to Linux as a root user.

2. Stop all processes and services that are using HDLM-managed paths.

   Stop all DBMS, various application processes, and services that are using a path managed by HDLM.

   If Xen is being used, make sure that domainU has been stopped. If domainU has been set to automatically start whenever domain0 starts, temporarily change the setting so that domainU will not start automatically.

3. Unmount all HDLM devices.

   Execute the following command:

   # umount mount-point

4. Change the setting of the environment variable PATH in the root environment setup file.

   Remove /opt/DynamicLinkManager/bin from the environment variable PATH in the environment setup file for the shell used by the root user.

5. Make sure that no HDLM devices are being used.

   Run the following command and make sure either that 0 is displayed for Used for sddlmfdrv or that sddlmfdrv is not displayed.

   # /sbin/lsmod
   Module                  Size  Used by
         :
         :
   sddlmfdrv              254092  0

   If sddlmfdrv is displayed and a value other than 0 is displayed for Used, perform the operation described in OPERATIONS_ON_HDLM-MANAGED_DEVICES=GUID-0907E71E-308B-49CA-AC59-2B75809B1ED2=3=EN=.html, and then perform steps 2 and 3 in REMOVING_HDLM_LEVEL1=GUID-C4EFDC2B-5FAF-446A-B9FA-B67EE4DBA3F8=2=EN=.html so that the HDLM devices can no longer be used.

6. Execute the remove command.

   Execute the following command to remove HDLM:

   # /opt/DynamicLinkManager/remover/removehdlm

7. Make sure that the remove processing has finished.

   Execute the following command to make sure that the remove processing has finished. The following shows the information that is output.

   # rpm -qi HDLM
   package HDLM is not installed

8. Start the processes and services stopped in step 2.

   The cluster software and volume management software will start up after the host starts.

   If you have temporarily changed the settings so that domainU will not automatically start in step 2, restore the previous settings.