Hitachi XP P9500 User Manual page 202

If a device name of an enclosure (HDS9980V0_1) is displayed in the
DEVICE column for the device, execute the following command to check
the device name, in the format cUtXdYsZ, corresponding to the device
name of the enclosure.
Note
If the vxdisk command displays the value of HDevName (cUtXdY) output
by the dlnkmgr command's view -path operation, the HDLM device is
recognized by VxVM. Go to step 2. If the vxdisk command does not
display the value of HDevName (cUtXdY) output by the dlnkmgr
command's view -path operation, the HDLM device is not recognized by
VxVM. In this case, perform step 2, then re-execute step 1 to make sure
that the HDLM device is recognized.
2 Execute the vxdmpadm command for the devices displayed by the vxdisk
.
command to make sure that only the HDLM devices are ENABLED.
To check whether the HDLM devices are ENABLED, see the value of
HDevName (cUtXdY) output by the dlnkmgr command's view -path
operation. Also, make sure that all non-HDLM devices are removed from
VxVM management and not displayed.
The following shows an example of executing the command:
Note
3-138
The device name of the enclosure corresponding to the LU might vary
before and after installing HDLM. Make sure that you perform step 1
to check the correspondence between the device name of the
enclosure and the LU.
The load balancing and failover functions will not work normally if the
vxdmpadm command outputs non- HDLM devices (devices that are not
Creating an HDLM Environment
Hitachi Dynamic Link Manager User Guide (for Solaris(R))