Hitachi XP P9500 User Manual page 403

The correspondence between the paths and path IDs might differ
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depending on whether dynamic reconfiguration of the HDLM device is
performed by executing the dlmcfgmgr utility or by restarting the
host.
You must restart the host after performing an upgrade installation or
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re-installation. LUs will not be added or deleted dynamically if you
execute the dlmcfgmgr utility before restarting the host.
If the HDLM driver configuration definition file (/kernel/drv/
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dlmfdrv.conf) contains the definition of a newly added LU, the
dlmcfgmgr utility makes the HDLM driver recognize the new LU so
that the LU is to be managed by HDLM. If the definition of an existing
LU no longer exists in the HDLM driver configuration file
(dlmfdrv.conf file), the dlmcfgmgr utility deletes the existing LU
from the HDLM driver and excludes it from HDLM management.
The HDLM driver is not dynamically reconfigured for deleted LUs (in
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Solaris 8 or Solaris 9), LUs for which a path has been added or
deleted, and LUs for which a path setting such as the instance number
has been changed. If you have deleted an LU (in Solaris 8 or Solaris
9), or added, deleted, or changed a path, update the configuration by
specifying the reconfiguration option, and then restarting the host.
To remove the LU managed by HDLM from HDLM management, you
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need to restart the host specifying the reconfiguration option. Do not
use the dlmcfgmgr utility.
If you want to specify that some of the newly added LUs are not to be
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managed by HDLM, you need to remove these LUs from HDLM
management before executing the dlmcfgmgr utility. If the newly
added LUs have been removed from HDLM management,
reconfiguration of these LUs is not performed for the HDLM driver.
After HDLM device reconfiguration is performed, executing the
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dlmcfgmgr utility will not dynamically add LUs if one of the following
occurs:
-For the LU, you changed the LUN mapping, the mapping-destination
storage port, or the HBA port on the recognizing host.
-You mapped another logical device to a LUN of the storage port being
used by the configured LU (in Solaris 8 or 9).
-When adding a new LU, you allocated an existing instance number to
the path of the added LU.
-You dynamically added an HBA.
-The major or minor number of the sd or ssd device for an LU to be
newly added matches the major or minor number of an sd or ssd
device previously registered in HDLM.
After HDLM device reconfiguration is performed, executing the
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dlmcfgmgr utility will not dynamically delete LUs if one of the
following occurs:
-For the LU, you changed the LUN mapping, the mapping-destination
storage port, or the HBA port on the recognizing host.
-An upper-level program is using the LU you attempted to delete.
Hitachi Dynamic Link Manager User Guide (for Solaris(R))
Utility Reference
7-17