HP XP7 Storage - Manual (Page 67)

For details about the cluster software supported by HDLM, see Table 3-5
Supported Cluster Software on page 3-8 in Cluster Software Supported by
HDLM on page 3-7 .
When load balancing is used by cluster software supported by HDLM, HDLM
uses an active host path to access an LU.
For example, in Figure 2-18 Path Switching in a Cluster Configuration on page
2-47 , when HDLM uses a path (A) from the active host to access a device
within the LU, if the path is placed offline, HDLM switches to another path (B)
to continue processing.
The trigger for switching nodes is dependent on the cluster software.
Figure 2-18 Path Switching in a Cluster Configuration
HDLM Functions
2-47
Hitachi Dynamic Link Manager (for Windows®) User Guide