Canceling The Settings For Hdlm; Operations On Hdlm-Managed Devices - Hitachi XP P9500 User Manual

3. Creating an HDLM Environment

3.23 Canceling the Settings for HDLM

Return the HDLM environment to the way it was before HDLM was installed by
following the procedure flow shown in Figure 3-36: Overview of HDLM
Uninstallation.
Figure 3-36: Overview of HDLM Uninstallation
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Perform as required.

3.23.1 Operations on HDLM-Managed Devices

The following procedure must be performed before uninstalling HDLM:
1. Back up all HDLM-managed devices as required (for example, using a tape
backup).
2. Collect all information on the correspondence between logical device file names
for the HDLM devices and LU numbers of the LUs in the storage system.
This step enables you to keep the correspondence between LUs and the logical
device file names for SCSI devices once uninstallation is complete.
3. Cancel HDLM device registration in an application.
An application uses an HDLM device when accessing an LU, so after HDLM is
uninstalled, the application cannot use the same HDLM device to access that LU.
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