HP Hitachi Dynamic Link Manager Software - Manual (Page 28)

This means that each LU in the storage system is always recognized as
only one LU, regardless of the number of paths that are connected to
SCSI devices.
You can display all the various SCSI devices from the Windows' Device
Manager window.
After the installation of HDLM, an LU recognized by a host is called a host LU
(HLU). The areas in a host LU that correspond to the Devs in a storage
system LU are called host devices (HDev).
On a system using HDLM, in order to access a target LU, a drive letter is first
assigned to the disk that has been integrated by the MPIO driver. Such disks
are displayed in the Windows' Disk Management window.
Figure 2-4 LU Configuration Recognized by the Host After the Installation of
HDLM on page 2-8 shows the LU configuration recognized by a host, after
the installation of HDLM.
Figure 2-4 LU Configuration Recognized by the Host After the Installation
of HDLM
Table 2-3 Components Recognized by the Host on page 2-8 lists the
components recognized by the host.
Table 2-3 Components Recognized by the Host
Components Description
HLU An LU that the host recognizes via the HDLM driver. This
type of LU is called a host LU. Regardless of how many
paths are connected to it, only one host LU is recognized
for each LU in the storage system.
2-8
HDLM Functions
Hitachi Dynamic Link Manager User Guide (for Windows(R))