HP Hitachi Dynamic Link Manager Software - Manual (Page 32)

16 Chapter 2 HDLM Functions
Table 2.3 lists the components recognized by the host.
Table 2.3 Components Recognized by Host
Components Description
HLU An LU that the host recognizes via the HDLM driver. It is called a host LU.
Regardless of how many paths exist, only one host LU is recognized for the LU
in the storage system.
HDev A Dev in an LU that the host recognizes via the HDLM driver. It is called a host
device.