HP Hitachi Dynamic Link Manager Software - Manual (Page 65)

For example, in Figure 2-17 Path Switching in a Cluster Configuration on page
2-45 , 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 2-17 Path Switching in a Cluster Configuration
HDLM Functions
2-45
Hitachi Dynamic Link Manager User Guide (for Windows(R))